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If* QORQ BUREAU OF MINES 
 
 I U S^OS INFORMATION CIRCULAR/1 990 
 
 £>sJ73 
 2^3 9 
 
 Electrical Accidents in Mining 
 (1980-85) 
 
 Fatal and Nonfatal Accidents 
 Underground and on the Surface 
 at Underground Coal and Metal- 
 Nonmetal Mines 
 
 By A. Oyler 
 
 U.S. BUREAU OF MINES 
 1910-1990 
 
 THE MINERALS SOURCE 
 
 %U OF ^ 
 
Mission: Asthe Nation's principal conservation 
 agency, the Department of the Interior has respon- 
 sibility for most of our nationally-owned public 
 lands and natural and cultural resources. This 
 includes fostering wise use of our land and water 
 resources, protecting our fish and wildlife, pre- 
 serving the environmental and cultural values of 
 our national parks and historical places, and pro- 
 viding for the enjoyment of life through outdoor 
 recreation. The Department assesses our energy 
 and mineral resources and works to assure that 
 their development is in the best interests of all 
 our people. The Department also promotes the 
 goals of the Take Pride in America campaign by 
 encouraging stewardship and citizen responsibil- 
 ity for the public lands and promoting citizen par- 
 ticipation in their care. The Department also has 
 a major responsibility for American Indian reser- 
 vation communities and for people who live in 
 Island Territories under U.S. Administration. 
 
Information Circular 9259 
 
 H 
 
 Electrical Accidents in Mining 
 (1980-85) 
 
 Fatal and Nonfatal Accidents 
 Underground and on the Surface 
 at Underground Coal and Metal- 
 Nonmetal Mines 
 
 By A. Oyler 
 
 UNITED STATES DEPARTMENT OF THE INTERIOR 
 Manuel Lujan, Jr., Secretary 
 
 BUREAU OF MINES 
 T S Ary, Director 
 
& & 
 
 ^ ^ 
 
 ">■<$> 
 
 Library of Congress Cataloging in Publication Data: 
 
 Oyler, Anne Marie 
 
 Electrical accidents in mining, 1980-85 : fatal and nonfatal accidents underground 
 and on the surface at underground coal and metal-nonmetal mines / Anne M. 
 Oyler. 
 
 p. cm. - (Bureau of Mines information circular; 9259) 
 
 Includes bibliographical references. 
 
 Supt. of Docs, no.: I 28.27:9259. 
 
 1. Mining accidents-United States. 2. Mining safety-United States. I. Title. 
 II. Series: Information circular (United States. Bureau of Mines); 9259. 
 
 TN295.U4 [HD7269.M61U6] 622 s-dc20 [363.11'%22'0973] 
 
 90-1703 CIP 
 
CONTENTS 
 
 Page 
 
 Abstract 1 
 
 Introduction 2 
 
 Electrical accidents in underground coal mines 2 
 
 Fatalities 2 
 
 Nonfatal accidents 2 
 
 Electrical accidents at the surface at underground coal mines 11 
 
 Fatalities 11 
 
 Nonfatal accidents 11 
 
 Electrical accidents in underground metal-nonmetal mines 17 
 
 Fatalities 17 
 
 Nonfatal accidents 17 
 
 Electrical accidents at the surface at underground metal-nonmetal mines 22 
 
 Fatalities 22 
 
 Nonfatal accidents 22 
 
 Cost information 27 
 
 Conclusions 45 
 
 References 46 
 
 Bibliography 46 
 
 Appendix A— Description of information categories and definition of nonfatal accidents as used 
 
 in this report 47 
 
 Appendix B.- Visual representations of information 48 
 
 ILLUSTRATIONS 
 
 1. Fatal and nonfatal electrical accidents in underground coal mines, 1980-85 3 
 
 2. Fatal and nonfatal electrical accidents at the surface at underground coal mines, 1980-85 12 
 
 3. Fatal and nonfatal electrical accidents in underground metal-nonmetal mines, 1980-85 18 
 
 4. Fatal and nonfatal electrical accidents at the surface at underground metal-nonmetal mines, 1980-85 ... 23 
 
 B-l. Fatal electrical accidents in underground coal mines, 1980-85 49 
 
 B-2. Nonfatal electrical accidents in underground coal mines, 1980-85 52 
 
 B-3. Fatal electrical accidents at the surface at underground coal mines, 1980-85 56 
 
 B-4. Nonfatal electrical accidents at the surface at underground coal mines, 1980-85 58 
 
 B-5. Nonfatal electrical accidents in underground metal-nonmetal mines, 1980-85 62 
 
 B-6. Nonfatal electrical accidents at the surface at underground metal-nonmetal mines, 1980-85 65 
 
 TABLES 
 
 1. Electrical fatalities versus total fatalities in underground coal mines 2 
 
 2. Summary of fatal electrical accidents in underground coal mines 4 
 
 3. Years of experience at specific job when fatal electrical accident occurred in underground coal mines ... 5 
 
 4. Times when electrical fatalities occurred in underground coal mines 5 
 
 5. Electrical nonfatal accidents versus total nonfatal accidents in underground coal mines 5 
 
 6. Summary of nonfatal electrical accidents in underground coal mines 6 
 
 7. Years of experience at specific job when nonfatal electrical accident occurred in underground coal 
 
 mines 10 
 
 8. Times when electrical nonfatal accidents occurred in underground coal mines 10 
 
 9. Total days lost per year as a result of nonfatal electrical accidents in underground coal mines 10 
 
 10. Electrical fatalities versus total fatalities at the surface at underground coal mines 11 
 
 11. Summary of fatal electrical accidents at the surface at underground coal mines 11 
 
 12. Years of experience at specific job when fatal accident occurred at the surface at underground coal 
 
 mines 13 
 
 13. Times when electrical fatalities occurred at the surface at underground coal mines 13 
 
 14. Electrical nonfatal accidents versus total nonfatal accidents at the surface at underground coal mines ... 13 
 
 15. Summary of nonfatal electrical accidents at the surface at underground coal mines 14 
 
TABLES-Continued 
 
 Page 
 
 16. Years of experience at specific job when nonfatal electrical accident occurred at the surface at 
 
 underground coal mines 16 
 
 17. Times when electrical nonfatal accidents occurred at the surface at underground coal mines 16 
 
 18. Total days lost per year as a result of nonfatal electrical accidents at the surface at underground coal 
 
 mines 16 
 
 19. Electrical fatalities versus total fatalities in underground metal-nonmetal mines 17 
 
 20. Summary of fatal electrical accidents in underground metal-nonmetal mines 17 
 
 21. Electrical nonfatal accidents versus total nonfatal accidents in underground metal-nonmetal mines 18 
 
 22. Summary of nonfatal electrical accidents in underground metal-nonmetal mines 19 
 
 23. Years of experience at specific job when nonfatal electrical accident occurred in underground 
 
 metal-nonmetal mines 21 
 
 24. Times when electrical nonfatal accidents occurred in underground metal-nonmetal mines 21 
 
 25. Total days lost per year as a result of nonfatal electrical accidents in underground metal-nonmetal 
 
 mines 21 
 
 26. Electrical fatalities versus total fatalities at the surface at underground metal-nonmetal mines 22 
 
 27. Summary of fatal electrical accidents at the surface at underground metal-nonmetal mines 22 
 
 28. Years of job experience at specific job when fatal electrical accident occurred at the surface at 
 
 underground metal-nonmetal mines 24 
 
 29. Times when electrical fatal accidents occurred at the surface at underground metal-nonmetal mines .... 24 
 
 30. Electrical nonfatal accidents versus total nonfatal accidents at the surface at underground 
 
 metal-nonmetal mines 24 
 
 31. Summary of nonfatal electrical accidents at the surface at underground metal-nonmetal mines 25 
 
 32. Years of experience at specific job when nonfatal electrical accident occurred at the surface at 
 
 underground metal-nonmetal mines 26 
 
 33. Times when electrical nonfatal accidents occurred at the surface at underground metal-nonmetal 
 
 mines 26 
 
 34. Total days lost per year as a result of nonfatal electrical accidents at the surface at underground 
 
 metal-nonmetal mines 26 
 
 35. Cost information relative to electrical accidents in underground coal mines, 1980 27 
 
 36. Cost information relative to electrical accidents in underground coal mines, 1981 28 
 
 37. Cost information relative to electrical accidents in underground coal mines, 1982 29 
 
 38. Cost information relative to electrical accidents in underground coal mines, 1983 30 
 
 39. Cost information relative to electrical accidents in underground coal mines, 1984 31 
 
 40. Cost information relative to electrical accidents in underground coal mines, 1985 32 
 
 41. Cost information relative to electrical accidents at the surface at underground coal mines, 1980 32 
 
 42. Cost information relative to electrical accidents at the surface at underground coal mines, 1981 33 
 
 43. Cost information relative to electrical accidents at the surface at underground coal mines, 1982 34 
 
 44. Cost information relative to electrical accidents at the surface at underground coal mines, 1983 35 
 
 45. Cost information relative to electrical accidents at the surface at underground coal mines, 1984 36 
 
 46. Cost information relative to electrical accidents at the surface at underground coal mines, 1985 37 
 
 47. Cost information relative to electrical accidents in underground metal-nonmetal mines, 1980 37 
 
 48. Cost information relative to electrical accidents in underground metal-nonmetal mines, 1981 38 
 
 49. Cost information relative to electrical accidents in underground metal-nonmetal mines, 1982 38 
 
 50. Cost information relative to electrical accidents in underground metal-nonmetal mines, 1983 39 
 
 51. Cost information relative to electrical accidents in underground metal-nonmetal mines, 1984 40 
 
 52. Cost information relative to electrical accidents in underground metal-nonmetal mines, 1985 40 
 
 53. Cost information relative to electrical accidents at the surface at underground metal-nonmetal mines, 
 
 1980 40 
 
 54. Cost information relative to electrical accidents at the surface at underground metal-nonmetal mines, 
 
 1981 41 
 
 55. Cost information relative to electrical accidents at the surface at underground metal-nonmetal mines, 
 
 1982 41 
 
TABLES-Continued 
 
 ui 
 
 Page 
 
 56. Cost information relative to electrical accidents at the surface at underground metal-nonmetal mines, 
 
 1983 42 
 
 57. Cost information relative to electrical accidents at the surface at underground metal-nonmetal mines, 
 
 1984 43 
 
 58. Cost information relative to electrical accidents at the surface at underground metal-nonmetal mines, 
 
 1985 44 
 
ELECTRICAL ACCIDENTS IN MINING (1980-85) 
 
 Fatal and Nonfatal Accidents Underground 
 
 and on the Surface at Underground Coal 
 
 and Metal-Nonmetal Mines 
 
 By A. Oyler 1 
 
 ABSTRACT 
 
 The U.S. Bureau of Mines has compiled data on the major causes of fatal and nonfatal electrical 
 accidents related to mining, and their associated costs, for the 1980-85 period. Specific electrical problem 
 areas were identified, allowing future research to be focused on reducing the frequency of these 
 occurrences. Recommendations for reducing the number of electrical accidents and injuries are 
 provided. 
 
 The four mining sectors for which data were gathered and compiled are (1) underground coal mines, 
 (2) surface at underground coal mines, (3) underground metal-nonmetal mines, and (4) surface at 
 underground metal-nonmetal mines. Nine categories of information pertaining to specific aspects of the 
 accident are used in this report: activity engaged in when the accident occurred, source of injury, job 
 title, mining method, location, machine, nature of injury, accident type, and part of body affected. The 
 number of years of experience at the specific job the employee was performing when the accident 
 occurred, time of accident, and in the case of nonfatal accidents, the total days lost per year, are also 
 summarized. 
 
 'Computer programmer, Pittsburgh Research Center, U.S. Bureau of Mines, Pittsburgh, PA. 
 
INTRODUCTION 
 
 The data contained in this report were accessed from 
 the Mine Safety and Health Administration (MSHA) 
 accident-injury data base. This data base contains infor- 
 mation on all U.S. mine accidents that have occurred since 
 1972 for coal mines and 1974 for metal-nonmetal mines. 
 
 The data base has 50 categories of information per- 
 taining to specific aspects of each accident. Brief defini- 
 tions of the nine categories selected for use in this report 
 are given in appendix A, along with definitions of nonfatal 
 accidents. Appendix B contains bar charts reflecting the 
 data presented in this report. 
 
 The cost information was gathered from an accident 
 cost indicator model (ACIM) (1-2), } The model lists 
 industry-, family-, and public-sector-related costs of the 
 accidents for 1980 through 1985 for each mining sector. 
 
 An investigation by MSHA provided information on 
 coal mine electrical fatalities for the 1970-82 period. The 
 information categories used included accident type and 
 location, victim status, controlling company name, system 
 voltage type, district code, date accident occurred, mine 
 
 identification code, and accident narrative descriptions. To 
 allow future research to be focused on reducing the fre- 
 quency of fatal and nonfatal electrical accidents related to 
 mining, the U.S. Bureau of Mines decided to do further 
 work to include the following nine categories of accident 
 information: activities engaged in when the accident oc- 
 curred, source of injury, job title, mining method, location, 
 machine, nature of injury, accident type, and part of body 
 affected. Data on the number of years of experience at 
 the specific job, time of accident, and total days lost per 
 year for nonfatal accidents were included in the Bureau's 
 analysis. 
 
 Other differences between the MSHA investigation and 
 this report include the following: (1) this report deals 
 not only with electrical fatalities but with nonfatal acci- 
 dents as well, (2) metal-nonmetal mines were included, 
 (3) different categories of information have been acces- 
 sed from the data base, (4) the data are presented in a 
 different format and bar charts have been added, and (5) 
 the period of time is 1980 through 1985. 
 
 ELECTRICAL ACCIDENTS IN UNDERGROUND COAL MINES 
 
 Figure 1 is a graphical presentation of electrical acci- 
 dents in underground coal mines for the 1980-85 period. 
 Observations concerning fatal and nonfatal accidents fol- 
 low, with the pertinent information relative to each cat- 
 egory summarized in tabular form. 
 
 FATALITIES 
 
 Of 474 total fatalities that occurred in underground coal 
 mines from 1980 through 1985, 32 or 6.8% were electrical 
 in nature (table 1). Nineteen of these incidents occurred 
 while the victim was performing electrical maintenance and 
 repair. The source of injury in most instances was elec- 
 trical apparatus (13 of 32 cases), followed by conductors, 
 cables, and trolley poles (12 of 32 cases). All victims suf- 
 fered a fatal electrocution. In 62% of these accidents, the 
 employee had less than 5 years of experience at the spe- 
 cific job being performed when the accident occurred (20 
 of 32 cases). The average age of the victims was 34. 
 
 Tables 2 through 4 summarize the pertinent information 
 relative to the fatal electrical accidents recorded in the 
 1980-85 period. 
 
 NONFATAL ACCIDENTS 
 
 Of the 66,995 nonfatal accidents that occurred in 
 underground coal mines from 1980 to 1985, 1,146 or 
 
 approximately 2% were electrical in nature (table 5). 
 Electrical repair and maintenance was the activity engaged 
 in 38% of the time when the nonfatal incident occurred 
 (439 of 1,146 cases). The two most common sources of 
 injury were electrical apparatus (478 of 1,146 cases), and 
 conductors, cables, trolley poles (466 of 1,146 cases). 
 Electrical arc burns resulted 53% of the time and the hand 
 was the part of the body most likely to be affected (349 of 
 1,146 cases). In 64% of these accidents, the employee had 
 less than 5 years of experience at the specific job being 
 performed when the accident occurred (742 of 1,146 
 cases). The average age of the victims was 35. 
 
 Tables 6 through 9 summarize the pertinent information 
 relative to the nonfatal electrical accidents recorded in 
 underground coal mines. 
 
 Table 1 .-Electrical fatalities versus total 
 fatalities in underground coal mines 
 
 _____ 
 
 1980 . . 
 
 1981 . . 
 
 1982 . . 
 
 1983 . . 
 
 1984 . . 
 
 1985 . . 
 Total 
 
 Electrical 
 
 Total 
 
 fatalities 
 
 fatalities 
 
 10 
 
 94 
 
 8 
 
 112 
 
 4 
 
 83 
 
 4 
 
 44 
 
 3 
 
 96 
 
 3 
 
 45 
 
 32 
 
 474 
 
 Italic numbers in parentheses refer to items in the list of references 
 preceding the appendixes at the end of this report. 
 
</> 
 
 Q 
 H 
 
 <X 
 
 O 
 
 o: 
 lu 
 as 
 
 z: 
 3 
 
 350T 
 
 300-- 
 
 250" 
 
 200" 
 
 158- 
 
 188- 
 
 50-- 
 
 KEY 
 Fatal 
 
 Y///A Nonfatal 
 
 1988 1981 1982 1983 1984 1985 
 
 Figure 1. -Fatal and nonfatal electrical accidents in underground coal mines, 1980-85. 
 
Table 2.-Summary of fatal electrical accidents in underground coal mines 
 
 1980 
 
 1981 
 
 1982 
 
 1983 
 
 1984 
 
 1985 
 
 Total 
 
 Activity when accident occurred: 
 
 Maintain, repair electrical equipment 
 
 Handle supplies, material 
 
 Move power cable 
 
 Rerail equipment 
 
 Inspect machinery 
 
 Drill face, rib, side 
 
 Walk, run 
 
 Bolt roof 
 
 Operate rock dust machine 
 
 Operate shuttle car operation 
 
 Inspect mine storage bins 
 
 Idle 
 
 Source of injury: 
 
 Electrical apparatus 
 
 Conductors, cables, trolley poles . . . 
 
 Transformers, converters 
 
 Underground mining machines .... 
 
 Mine jeep, jitney 
 
 Job title: 
 
 Electrician 
 
 Laborer, muck machine operator . . . 
 
 Maintenance foreman 
 
 Roof bolter 
 
 Mechanic 
 
 Labor foreman 
 
 Mine foreman 
 
 Blaster 
 
 Drill operator 
 
 Motorman 
 
 Wireman 
 
 Section foreman 
 
 Master electrician 
 
 Laborer, propman 
 
 Shuttle car operator 
 
 Mining method: 
 
 Continuous 
 
 Conventional-stope 
 
 Not defined 
 
 Longwall 
 
 Location: 
 
 Face 
 
 Other 
 
 Intersection 
 
 Not defined 
 
 Machine: 
 
 Unknown 
 
 Roof bolter 
 
 Continuous miner, tunnel borer .... 
 
 Shuttle car 
 
 Pump 
 
 Man trip, man car, jeep, personnel 
 carrier, etc 
 
 Cutting machine (mining only), chain 
 cutter 
 
 Rock drill, jackleg, jackhammer, 
 drifter, etc 
 
 Mine car, nipper truck, timber truck 
 (underground only) 
 
 Rock duster 
 
 Conveyor, all types; belt feeder .... 
 
 Plow shearer, longwall machine .... 
 
 Machine, not elsewhere classified . . . 
 
 Large shop tools: lathe, drill, 
 
 press, etc 
 
 Nature of injury: 
 
 Electric shock, electrocution 
 
 Accident type: 
 
 Electric current 
 
 Part of body affected: Body systems . 
 
 3 
 
 5 
 
 3 
 
 3 
 
 2 
 
 3 
 
 19 
 
 
 1 
 
 
 
 
 
 
 
 
 
 2 
 
 
 1 
 
 
 
 
 
 
 
 
 
 2 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 4 
 
 4 
 
 2 
 
 1 
 
 1 
 
 1 
 
 13 
 
 5 
 
 3 
 
 1 
 
 1 
 
 2 
 
 
 
 12 
 
 1 
 
 
 
 
 
 1 
 
 
 
 2 
 
 4 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 2 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 2 
 
 2 
 
 1 
 
 2 
 
 
 
 
 
 7 
 
 1 
 
 1 
 
 1 
 
 
 
 
 
 1 
 
 4 
 
 1 
 
 
 
 1 
 
 1 
 
 1 
 
 
 
 4 
 
 1 
 
 1 
 
 
 
 
 
 1 
 
 
 
 3 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 2 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 2 
 
 1 
 
 
 
 
 
 
 
 1 
 
 
 
 2 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 7 
 
 6 
 
 3 
 
 1 
 
 
 
 
 
 17 
 
 3 
 
 1 
 
 
 
 1 
 
 2 
 
 1 
 
 8 
 
 
 
 1 
 
 1 
 
 1 
 
 1 
 
 1 
 
 5 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 2 
 
 3 
 
 4 
 
 1 
 
 1 
 
 1 
 
 3 
 
 13 
 
 6 
 
 2 
 
 2 
 
 1 
 
 
 
 
 
 11 
 
 
 
 2 
 
 1 
 
 
 
 2 
 
 
 
 5 
 
 1 
 
 
 
 
 
 2 
 
 
 
 
 
 3 
 
 3 
 
 2 
 
 3 
 
 2 
 
 
 
 2 
 
 12 
 
 2 
 
 
 
 
 
 
 
 1 
 
 
 
 3 
 
 1 
 
 2 
 
 
 
 
 
 
 
 
 
 3 
 
 
 
 2 
 
 1 
 
 
 
 
 
 
 
 3 
 
 
 
 
 
 
 
 1 
 
 1 
 
 
 
 2 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 1 
 
 10 
 
 8 
 
 4 
 
 4 
 
 3 
 
 3 
 
 32 
 
 10 
 
 8 
 
 4 
 
 4 
 
 3 
 
 3 
 
 32 
 
 10 
 
 8 
 
 4 
 
 4 
 
 3 
 
 3 
 
 32 
 
Table 3.-Years of experience 1 at specific job when fatal electrical 
 accident occurred in underground coal mines 
 
 Year 0-5 6-10 11-15 16-20 Over 20 
 
 1980 7 2 1 
 
 1981 6 1 1 
 
 1982 3 1 
 
 1983 4 
 
 1984 1 2 
 
 1985 _3 
 
 Total 20 9 1 1 1_ 
 
 'Data do not represent total mining experience of employees, only experience at the specific 
 job being performed when accident occurred. 
 
 Table 4.-Times when electrical fatalities occurred in underground coal mines 
 
 1980 1981 
 
 1982 
 
 1983 1984 1985 
 
 Total 
 
 11:01 a.m. to 1:01 p.m. 
 
 1:01 to 3:01 p.m 
 
 3:01 to 5:01 p.m 
 
 5:01 to 7:01 p.m 
 
 7:01 to 9:01 p.m 
 
 9:01 to 11:01 p.m 
 
 11:01 p.m. to 1:01 a.m. 
 
 1:01 to 3:01 a.m 
 
 3:01 to 5:01 a.m 
 
 5:01 to 7:01 a.m 
 
 7:01 to 9:01 a.m 
 
 9:01 to 11:01 a.m 
 
 Unknown 
 
 2 
 
 
 
 
 
 
 
 
 
 2 
 
 4 
 
 2 
 
 1 
 
 
 
 
 
 
 
 1 
 
 4 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 2 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 2 
 
 3 
 
 1 
 
 
 
 
 
 
 
 
 
 4 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 1 
 
 1 
 
 
 
 1 
 
 
 
 3 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 1 
 
 2 
 
 1 
 
 
 
 
 
 
 
 4 
 
 1 
 
 1 
 
 1 
 
 
 
 
 
 
 
 3 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 2 
 
 
 
 
 
 2 
 
 NOTE.-From 1980 through 1985, 16 of 30 accidents occurred in the afternoon. In 2 cases, 
 times were not listed and are shown as unknown. 
 
 Table 5.-Electrical nonfatal accidents versus total nonfatal accidents 
 in underground coal mines 
 
 Year 
 
 Electrical nonfatal 
 accidents 
 
 Total nonfatal 
 accidents 
 
 1980 .. 
 
 1981 . . 
 
 1982 .. 
 
 1983 .. 
 
 1984 .. 
 
 1985 . . 
 Total 
 
 303 
 243 
 240 
 120 
 122 
 118 
 
 16,398 
 
 13,257 
 
 12,610 
 
 8,172 
 
 8,740 
 
 7,818 
 
 1,146 
 
 66,995 
 
Table 6.-Summary of nonfatal electrical accidents in underground coal mines 
 
 1980 
 
 1981 
 
 1982 
 
 1983 
 
 1984 
 
 1985 
 
 Total 
 
 Activity when accident occurred: 
 
 Maintain, repair electrical equipment 
 
 Handle supplies, material 
 
 Maintain machine 
 
 Move power cable 
 
 Rerail equipment 
 
 Operate, locomotive 
 
 Operate, ride man trip 
 
 Inspect machinery 
 
 Use handtools 
 
 Escaping a hazard 
 
 Use continuous miner 
 
 Operate shuttle car 
 
 Operate locomotive 
 
 Idle 
 
 Weld, cut 
 
 Bolt roof 
 
 Unknown 
 
 Operate load-haul-dump 
 
 Bolt roof, insert bolt 
 
 Walk, run 
 
 Observe operations 
 
 Other 
 
 Ride equipment 
 
 Use powered handtools 
 
 Cleanup 
 
 Handle timber 
 
 Operate jitney 
 
 Supervise 
 
 Operate conveyor belt 
 
 Operate loading machine 
 
 Get on-off equipment 
 
 Hand load , 
 
 Bolt roof, drilling 
 
 Drill face, rib, side 
 
 Hang tubes, ropes, wire, pipe 
 
 Use cutting machine 
 
 Operate underground equipment . . , 
 
 Inspect mine storage bins 
 
 Couple mine cars 
 
 Move equipment 
 
 Grinder 
 
 Handle explosives 
 
 Lay track, roadbed 
 
 Sprag, block mine cars 
 
 Bar down face, roof 
 
 Caging 
 
 Cement work , 
 
 Horseplay 
 
 Bolt roof, tramming 
 
 Operate rock dust machine 
 
 Crawling, kneeling 
 
 Operate longwall equipment 
 
 Set, relocate pipes 
 
 Source of injury: 
 
 Electrical apparatus 
 
 Conductors, cables, trolley poles . . 
 
 Flame, fire, smoke 
 
 Transformers, converters 
 
 Floor, bottom 
 
 Underground mining machines 
 
 Mine jeep, jitney 
 
 Acids, alkalies (wet cement) 
 
 118 
 
 99 
 
 88 
 
 53 
 
 51 
 
 30 
 
 439 
 
 27 
 
 27 
 
 40 
 
 16 
 
 10 
 
 8 
 
 128 
 
 18 
 
 14 
 
 14 
 
 8 
 
 16 
 
 15 
 
 85 
 
 20 
 
 14 
 
 11 
 
 5 
 
 7 
 
 12 
 
 69 
 
 18 
 
 14 
 
 16 
 
 4 
 
 2 
 
 6 
 
 60 
 
 17 
 
 
 
 16 
 
 6 
 
 
 
 
 
 39 
 
 11 
 
 6 
 
 6 
 
 4 
 
 4 
 
 4 
 
 35 
 
 6 
 
 6 
 
 11 
 
 3 
 
 
 
 9 
 
 35 
 
 4 
 
 3 
 
 4 
 
 5 
 
 5 
 
 9 
 
 30 
 
 10 
 
 10 
 
 4 
 
 3 
 
 1 
 
 
 
 28 
 
 3 
 
 5 
 
 2 
 
 2 
 
 5 
 
 1 
 
 18 
 
 4 
 
 2 
 
 2 
 
 1 
 
 2 
 
 4 
 
 15 
 
 
 
 8 
 
 
 
 
 
 4 
 
 2 
 
 14 
 
 4 
 
 3 
 
 1 
 
 1 
 
 3 
 
 1 
 
 13 
 
 7 
 
 
 
 3 
 
 1 
 
 1 
 
 
 
 12 
 
 4 
 
 3 
 
 1 
 
 
 
 2 
 
 2 
 
 12 
 
 1 
 
 1 
 
 5 
 
 1 
 
 1 
 
 1 
 
 10 
 
 2 
 
 2 
 
 
 
 
 
 2 
 
 3 
 
 9 
 
 2 
 
 2 
 
 
 
 1 
 
 2 
 
 1 
 
 8 
 
 1 
 
 3 
 
 1 
 
 1 
 
 2 
 
 
 
 8 
 
 2 
 
 3 
 
 
 
 
 
 1 
 
 
 
 6 
 
 2 
 
 2 
 
 1 
 
 
 
 
 
 1 
 
 6 
 
 4 
 
 1 
 
 
 
 
 
 
 
 
 
 5 
 
 2 
 
 2 
 
 1 
 
 
 
 
 
 
 
 5 
 
 
 
 2 
 
 1 
 
 2 
 
 
 
 
 
 5 
 
 2 
 
 
 
 1 
 
 
 
 
 
 1 
 
 4 
 
 2 
 
 1 
 
 1 
 
 
 
 
 
 
 
 4 
 
 2 
 
 
 
 1 
 
 
 
 
 
 1 
 
 4 
 
 2 
 
 
 
 
 
 
 
 
 
 1 
 
 3 
 
 1 
 
 1 
 
 
 
 
 
 
 
 1 
 
 3 
 
 
 
 2 
 
 1 
 
 
 
 
 
 
 
 3 
 
 2 
 
 
 
 
 
 
 
 
 
 
 
 2 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 2 
 
 
 
 1 
 
 1 
 
 
 
 
 
 
 
 2 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 2 
 
 
 
 
 
 1 
 
 1 
 
 
 
 
 
 2 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 2 
 
 
 
 
 
 2 
 
 
 
 
 
 
 
 2 
 
 
 
 
 
 
 
 1 
 
 1 
 
 
 
 2 
 
 
 
 
 
 1 
 
 1 
 
 
 
 
 
 2 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 113 
 
 110 
 
 108 
 
 53 
 
 57 
 
 37 
 
 478 
 
 132 
 
 95 
 
 91 
 
 46 
 
 51 
 
 51 
 
 466 
 
 11 
 
 11 
 
 11 
 
 6 
 
 3 
 
 14 
 
 56 
 
 7 
 
 5 
 
 5 
 
 3 
 
 1 
 
 3 
 
 24 
 
 8 
 
 4 
 
 3 
 
 2 
 
 2 
 
 
 
 19 
 
 2 
 
 1 
 
 6 
 
 2 
 
 2 
 
 4 
 
 17 
 
 5 
 
 3 
 
 3 
 
 1 
 
 1 
 
 1 
 
 14 
 
 1 
 
 4 
 
 
 
 
 
 1 
 
 1 
 
 7 
 
Table S.-Summary of nonfatal electrical accidents in underground eoal mines-Continued 
 
 1980 
 
 1981 
 
 1982 
 
 1983 
 
 1984 
 
 1985 
 
 Total 
 
 Source of injury-Continued 
 
 Underground narrow-gage railcars . . . 
 
 Posts, caps, timbers 
 
 Belt conveyors 
 
 Metal (pipes, wire, nails, etc.) 
 
 Apparel 
 
 Machines, office 
 
 Side, rib 
 
 Motors 
 
 Metal covers, guards, gates, roof bolt 
 plates 
 
 Pumps, fans, compressors, engines . . 
 
 Broken rock, coal waste 
 
 Explosives 
 
 Elevators, cages, skips 
 
 Wrench 
 
 Noise 
 
 Back, roof, hanging wall, underground 
 
 Powered handtools 
 
 Roof bolts 
 
 Grinder, polisher, buffer 
 
 Bodily motion 
 
 Liquids 
 
 Power saw 
 
 Chains, ropes, cables, not conveyor . . 
 
 Cribbing 
 
 Chemicals 
 
 Handtools (not powered) 
 
 Nonpowered vehicles 
 
 Hoisting apparatus 
 
 Molten metal 
 
 Forklifts, stackers 
 
 Job title: 
 
 Mechanic 
 
 Electrician 
 
 Laborer, muck machine operator 
 
 Motorman 
 
 Shuttle car operator 
 
 Roof bolter 
 
 Labor foreman 
 
 Maintenance foreman 
 
 Continuous miner operator 
 
 Continuous miner helper 
 
 Unknown 
 
 Scoop car operator 
 
 Conveyor man 
 
 Mine foreman 
 
 Cutting machine operator 
 
 Master electrician 
 
 Roof bolt helper 
 
 Section foreman 
 
 Wireman 
 
 Fire boss 
 
 Trackman 
 
 Trainee 
 
 Superintendent 
 
 Laborer, propman 
 
 Loading machine operator 
 
 Rock duster 
 
 Assistant mine foreman 
 
 Jackster 
 
 Pumper 
 
 Stopping builder 
 
 3 
 2 
 
 3 
 2 
 1 
 2 
 1 
 
 1 
 1 
 2 
 1 
 1 
 
 
 1 
 1 
 1 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 65 
 
 46 
 
 31 
 
 ,27 
 
 12 
 
 11 
 
 16 
 
 7 
 
 8 
 
 9 
 
 5 
 
 3 
 
 6 
 
 4 
 
 3 
 
 4 
 
 5 
 
 1 
 
 4 
 
 1 
 
 2 
 
 4 
 
 2 
 
 3 
 
 1 
 
 2 
 
 
 
 1 
 
 1 
 
 1 
 
 
 
 1 
 2 
 
 
 1 
 1 
 
 
 
 
 
 
 1 
 1 
 1 
 
 
 
 
 
 1 
 1 
 
 
 
 
 
 
 
 
 
 
 
 42 
 
 38 
 
 24 
 
 11 
 
 12 
 
 11 
 
 14 
 
 11 
 
 6 
 
 6 
 
 2 
 
 10 
 
 4 
 
 5 
 
 4 
 
 2 
 
 2 
 
 4 
 
 3 
 
 3 
 
 4 
 
 3 
 
 2 
 
 2 
 
 1 
 
 1 
 
 4 
 
 
 
 2 
 
 3 
 
 2 
 
 
 
 
 1 
 1 
 
 
 2 
 
 
 2 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 1 
 1 
 1 
 
 
 
 
 
 
 
 
 34 
 
 46 
 
 16 
 
 33 
 
 10 
 
 12 
 
 10 
 
 5 
 
 4 
 
 2 
 
 13 
 
 3 
 
 6 
 
 2 
 
 1 
 
 5 
 
 1 
 
 3 
 
 2 
 
 4 
 
 1 
 
 2 
 
 2 
 
 3 
 
 1 
 
 1 
 
 1 
 
 3 
 
 5 
 
 1 
 
 
 
 1 
 
 
 
 1 
 1 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 1 
 1 
 
 
 
 
 
 22 
 28 
 9 
 9 
 8 
 2 
 6 
 6 
 4 
 1 
 2 
 3 
 
 1 
 
 
 
 
 1 
 2 
 2 
 
 
 
 1 
 4 
 1 
 
 1 
 
 
 
 
 1 
 1 
 
 
 
 
 1 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 28 
 30 
 7 
 4 
 5 
 8 
 2 
 4 
 2 
 2 
 
 2 
 2 
 2 
 1 
 2 
 2 
 
 1 
 
 1 
 
 
 
 1 
 4 
 
 1 
 
 
 
 
 
 2 
 
 
 
 
 
 
 
 
 
 
 
 1 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 1 
 1 
 
 23 
 16 
 7 
 3 
 10 
 6 
 2 
 6 
 4 
 5 
 4 
 4 
 4 
 1 
 4 
 
 1 
 3 
 
 1 
 
 
 2 
 2 
 2 
 
 
 1 
 
 
 
 214 
 
 204 
 
 94 
 
 87 
 
 57 
 
 50 
 
 50 
 
 39 
 
 28 
 
 25 
 
 26 
 
 25 
 
 22 
 
 15 
 
 13 
 
 13 
 
 11 
 
 11 
 
 11 
 
 11 
 
 10 
 
 9 
 
 8 
 
 10 
 
 7 
 
 12 
 
 6 
 
 6 
 
 9 
 
 5 
 
Table 6.-Summary of nonfatal electrical accidents in underground coal mines-Continued 
 
 1980 
 
 1981 
 
 1982 
 
 1983 
 
 1984 
 
 1985 
 
 Total 
 
 Job title-Continued 
 
 Drill operator 
 
 Supplyman 
 
 Rock driller 
 
 Electrical helper 
 
 Longwall shear operator 
 
 Utility man 
 
 Belt cleaner 
 
 Blaster 
 
 Welder, cement man 
 
 Master mechanic 
 
 Beltman 
 
 Brakeman, rope rider 
 
 Tractor operator 
 
 Brattice man 
 
 Jack setter 
 
 Rodman 
 
 Boom operator 
 
 Yard foreman 
 
 Safety representative 
 
 Timberman 
 
 Battery station operator 
 
 Truck driver 
 
 Electrical engineer 
 
 Waterline man 
 
 Scoop tram operator 
 
 Transportation trainee 
 
 Mining method: 
 
 Continuous 
 
 Not defined 
 
 Conventional-stope 
 
 Longwall 
 
 Other 
 
 Shortwall 
 
 Hand 
 
 Location: 
 
 Other 
 
 Face 
 
 Not defined 
 
 Intersection 
 
 Shop 
 
 Vertical shaft 
 
 Inclined shaft 
 
 Nature of injury: 
 
 Electrical arc burn 
 
 Electrical burn (contact burn) . 
 
 Electrical shock (electrocution) 
 
 Burn or scald (heat) 
 
 Multiple injuries 
 
 Asphyxia 
 
 Bruise 
 
 Sprain, strain 
 
 Chemical burns 
 
 Laceration, cut, puncture 
 
 Unclassified, not determined . 
 
 Fracture 
 
 Poisoning 
 
 Dislocation 
 
 Scratches, abrasions 
 
 Hearing loss or impairment . . 
 
 Dust in eyes 
 
 Other 
 
 1 
 
 
 
 1 
 
 1 
 
 1 
 
 1 
 
 5 
 
 
 
 2 
 
 1 
 
 
 
 
 
 2 
 
 5 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 1 
 
 1 
 
 1 
 
 
 
 1 
 
 
 
 4 
 
 2 
 
 
 
 
 
 
 
 1 
 
 1 
 
 4 
 
 1 
 
 1 
 
 1 
 
 
 
 1 
 
 
 
 4 
 
 2 
 
 
 
 1 
 
 
 
 1 
 
 
 
 4 
 
 1 
 
 
 
 1 
 
 
 
 
 
 1 
 
 3 
 
 3 
 
 
 
 
 
 
 
 
 
 
 
 3 
 
 1 
 
 1 
 
 1 
 
 
 
 
 
 
 
 3 
 
 2 
 
 
 
 
 
 1 
 
 1 
 
 
 
 4 
 
 
 
 
 
 
 
 1 
 
 1 
 
 
 
 2 
 
 
 
 
 
 
 
 1 
 
 1 
 
 
 
 2 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 2 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 192 
 
 147 
 
 113 
 
 70 
 
 70 
 
 61 
 
 653 
 
 57 
 
 55 
 
 91 
 
 29 
 
 33 
 
 30 
 
 295 
 
 40 
 
 28 
 
 26 
 
 10 
 
 9 
 
 13 
 
 126 
 
 6 
 
 8 
 
 1 
 
 8 
 
 4 
 
 7 
 
 34 
 
 6 
 
 5 
 
 7 
 
 3 
 
 6 
 
 7 
 
 34 
 
 2 
 
 
 
 
 
 
 
 
 
 
 
 2 
 
 
 
 
 
 2 
 
 
 
 
 
 
 
 2 
 
 142 
 
 120 
 
 88 
 
 45 
 
 51 
 
 47 
 
 493 
 
 67 
 
 42 
 
 40 
 
 23 
 
 21 
 
 27 
 
 220 
 
 38 
 
 36 
 
 67 
 
 29 
 
 22 
 
 26 
 
 218 
 
 37 
 
 34 
 
 29 
 
 19 
 
 21 
 
 13 
 
 153 
 
 8 
 
 4 
 
 8 
 
 2 
 
 5 
 
 1 
 
 28 
 
 7 
 
 4 
 
 4 
 
 1 
 
 2 
 
 4 
 
 22 
 
 4 
 
 3 
 
 4 
 
 1 
 
 
 
 
 
 12 
 
 164 
 
 134 
 
 124 
 
 53 
 
 78 
 
 60 
 
 613 
 
 54 
 
 43 
 
 51 
 
 39 
 
 17 
 
 17 
 
 221 
 
 38 
 
 29 
 
 44 
 
 10 
 
 14 
 
 22 
 
 157 
 
 6 
 
 3 
 
 6 
 
 4 
 
 2 
 
 11 
 
 32 
 
 10 
 
 7 
 
 2 
 
 3 
 
 4 
 
 1 
 
 27 
 
 5 
 
 9 
 
 5 
 
 2 
 
 1 
 
 5 
 
 27 
 
 10 
 
 2 
 
 2 
 
 1 
 
 
 
 
 
 15 
 
 3 
 
 6 
 
 2 
 
 1 
 
 3 
 
 
 
 15 
 
 2 
 
 4 
 
 
 
 2 
 
 1 
 
 1 
 
 10 
 
 4 
 
 2 
 
 
 
 1 
 
 
 
 
 
 7 
 
 2 
 
 
 
 1 
 
 1 
 
 1 
 
 1 
 
 6 
 
 2 
 
 1 
 
 1 
 
 1 
 
 
 
 
 
 5 
 
 1 
 
 1 
 
 
 
 1 
 
 1 
 
 
 
 4 
 
 1 
 
 1 
 
 1 
 
 
 
 
 
 
 
 3 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
Table 6.-Summary of nonfatal electrical accidents in underground coal mines-Continued 
 
 1980 
 
 1981 
 
 1982 
 
 1983 
 
 1984 
 
 1985 
 
 Total 
 
 Accident type: 
 
 Rash burns, electric 
 
 Electric current 
 
 Contact with hot substance 
 
 Inhalation of toxics 
 
 Fall from machine 
 
 Struck against stationary object . . . 
 
 Absorption of toxics 
 
 Struck, not elsewhere classified . . . 
 
 Struck by flying object 
 
 Struck against moving object 
 
 Fall against object 
 
 Fall to working surface 
 
 Unknown 
 
 Struck by falling object 
 
 Overexertion 
 
 Bodily reaction 
 
 Rash burns, welding 
 
 Caught in moving stationary object 
 Part of body: 
 
 Hand 
 
 Body systems 
 
 Multiple injuries 
 
 Eyes 
 
 Rngers 
 
 Upper extremities, multiple 
 
 Wrist 
 
 Leg 
 
 Arm 
 
 Face, multiple parts 
 
 Face 
 
 Forearm 
 
 Back 
 
 Head, multiple parts 
 
 Knee 
 
 Shoulders 
 
 Elbow 
 
 Neck 
 
 Head 
 
 Thigh 
 
 Nose 
 
 Internal ear 
 
 Ankle 
 
 Lower leg 
 
 Hips 
 
 Chest 
 
 Trunk, multiple injuries 
 
 Lower leg 
 
 Upper arm 
 
 Leg, multiple injuries 
 
 Body parts 
 
 Unclassified 
 
 176 
 
 136 
 
 122 
 
 51 
 
 79 
 
 60 
 
 624 
 
 83 
 
 74 
 
 97 
 
 52 
 
 32 
 
 40 
 
 378 
 
 9 
 
 3 
 
 6 
 
 5 
 
 3 
 
 11 
 
 37 
 
 6 
 
 11 
 
 5 
 
 3 
 
 3 
 
 5 
 
 33 
 
 8 
 
 5 
 
 2 
 
 1 
 
 2 
 
 
 
 18 
 
 3 
 
 3 
 
 3 
 
 1 
 
 
 
 
 
 10 
 
 1 
 
 3 
 
 
 
 2 
 
 1 
 
 1 
 
 8 
 
 4 
 
 1 
 
 1 
 
 
 
 1 
 
 
 
 7 
 
 2 
 
 1 
 
 1 
 
 1 
 
 1 
 
 
 
 6 
 
 3 
 
 2 
 
 
 
 
 
 
 
 
 
 5 
 
 3 
 
 
 
 
 
 2 
 
 
 
 
 
 5 
 
 1 
 
 1 
 
 1 
 
 1 
 
 
 
 
 
 4 
 
 1 
 
 1 
 
 
 
 
 
 
 
 1 
 
 3 
 
 2 
 
 
 
 
 
 
 
 
 
 
 
 2 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 2 
 
 
 
 2 
 
 
 
 
 
 
 
 
 
 2 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 92 
 
 75 
 
 79 
 
 34 
 
 33 
 
 36 
 
 349 
 
 44 
 
 39 
 
 49 
 
 13 
 
 16 
 
 27 
 
 188 
 
 38 
 
 40 
 
 33 
 
 25 
 
 23 
 
 17 
 
 176 
 
 52 
 
 29 
 
 27 
 
 15 
 
 12 
 
 11 
 
 146 
 
 15 
 
 13 
 
 16 
 
 10 
 
 14 
 
 6 
 
 74 
 
 9 
 
 9 
 
 8 
 
 11 
 
 6 
 
 11 
 
 54 
 
 3 
 
 5 
 
 3 
 
 
 
 4 
 
 1 
 
 16 
 
 7 
 
 2 
 
 2 
 
 1 
 
 1 
 
 2 
 
 15 
 
 5 
 
 1 
 
 3 
 
 4 
 
 2 
 
 
 
 15 
 
 4 
 
 5 
 
 1 
 
 
 
 2 
 
 2 
 
 14 
 
 3 
 
 4 
 
 2 
 
 1 
 
 2 
 
 2 
 
 14 
 
 6 
 
 2 
 
 
 
 2 
 
 1 
 
 2 
 
 13 
 
 6 
 
 4 
 
 
 
 
 
 1 
 
 
 
 11 
 
 4 
 
 2 
 
 3 
 
 
 
 
 
 
 
 9 
 
 2 
 
 4 
 
 2 
 
 
 
 1 
 
 
 
 9 
 
 4 
 
 2 
 
 2 
 
 
 
 
 
 
 
 8 
 
 3 
 
 
 
 2 
 
 2 
 
 
 
 
 
 7 
 
 1 
 
 
 1 
 
 
 
 2 
 
 
 
 5 
 
 1 
 
 
 2 
 
 1 
 
 
 
 
 
 5 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 3 
 
 1 
 
 
 
 
 
 
 
 
 
 
 2 
 
 
 
 
 
 
 
 
 
 
 1 
 
 2 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 2 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
10 
 
 Table 7.-Years of experience 1 at specific job when nonfatal electrical 
 accident occurred in underground coal mines 
 
 Year 0-5 6-10 11-15 16-20 Over 20 Unknown 
 
 1980 228 44 13 3 8 7 
 
 1981 170 51 8 1 6 7 
 
 1982 147 52 15 2 5 19 
 
 1983 69 36 2 13 
 
 1984 58 41 8 3 12 
 
 1985 70 32 J) 2 5 
 
 Total 742 256 55 11 1$) 63 
 
 'Data do not represent total mining experience of employees, only experience at the specific 
 job being performed when accident occurred. 
 
 Table 8.-Times when electrical nonfatal accidents occurred 
 in underground coal mines 
 
 1980 1981 
 
 1982 1983 1984 1985 
 
 Total 
 
 11:01 a.m. to 1:01 p.m. 
 
 1:01 to 3:01 p.m 
 
 3:01 to 5:01 p.m 
 
 5:01 to 7:01 p.m 
 
 7:01 to 9:01 p.m 
 
 9:01 to 11:01 p.m. . . . 
 11:01 p.m. to 1:01 a.m. 
 
 1:01 to 3:01 a.m 
 
 3:01 to 5:01 a.m 
 
 5:01 to 7:01 a.m 
 
 7:01 to 9:01 a.m 
 
 9:01 to 11:01 a.m. . . . 
 Unknown 
 
 22 
 
 20 
 
 20 
 
 7 
 
 6 
 
 5 
 
 80 
 
 28 
 
 25 
 
 24 
 
 9 
 
 12 
 
 12 
 
 110 
 
 31 
 
 21 
 
 18 
 
 9 
 
 7 
 
 7 
 
 93 
 
 30 
 
 15 
 
 21 
 
 16 
 
 14 
 
 15 
 
 111 
 
 21 
 
 19 
 
 19 
 
 11 
 
 10 
 
 9 
 
 89 
 
 18 
 
 21 
 
 17 
 
 4 
 
 8 
 
 8 
 
 76 
 
 23 
 
 18 
 
 18 
 
 5 
 
 4 
 
 6 
 
 74 
 
 19 
 
 13 
 
 27 
 
 13 
 
 14 
 
 13 
 
 99 
 
 23 
 
 22 
 
 18 
 
 11 
 
 10 
 
 10 
 
 94 
 
 22 
 
 15 
 
 12 
 
 9 
 
 11 
 
 10 
 
 79 
 
 30 
 
 21 
 
 19 
 
 15 
 
 9 
 
 10 
 
 104 
 
 28 
 
 28 
 
 19 
 
 9 
 
 9 
 
 8 
 
 101 
 
 8 
 
 5 
 
 8 
 
 2 
 
 8 
 
 5 
 
 36 
 
 NOTE.-From 1980 through 1985, 589 of 1,110 accidents occurred in the a.m. In 36 cases, the 
 times were not listed and are shown here as unknown. 
 
 Table 9.-Total days lost per year as a result of nonfatal electrical 
 accidents in underground coal mines 
 
 Year Accidents 
 
 1980 303 
 
 1981 243 
 
 1982 240 
 
 1983 120 
 
 1984 122 
 
 1985 118 
 
 Total 1,146 
 
 Days lost 
 
 4,169 
 3,146 
 3,541 
 2,226 
 4,302 
 1,925 
 
 19,309 
 
11 
 
 ELECTRICAL ACCIDENTS AT THE SURFACE AT UNDERGROUND COAL MINES 
 
 Figure 2 is a graphical presentation of fatal and nonfatal 
 electrical accidents at the surface at underground coal 
 mines including associated shops, yards, and tipples when 
 located at the mine. 
 
 FATALITIES 
 
 Of the 45 total fatalities that occurred at the surface at 
 underground coal mines including associated shops, yards, 
 and tipples when located at the mine, 8 or 18% were elec- 
 trical as shown in table 10. Five of these incidents oc- 
 curred while the victim was performing electrical mainte- 
 nance and repair. The source of injury in most instances 
 was electrical apparatus (five of eight cases). All victims 
 suffered a fatal electrocution. In three of the cases, the 
 employee had less than 5 years of experience at the spe- 
 cific job being performed when the accident occurred. In 
 three cases, the employee had from 11 to 15 years of expe- 
 rience at that specific job. The average age of the victims 
 was 37. 
 
 Tables 11 through 13 summarize the pertinent informa- 
 tion relative to the fatal accidents recorded at the surface 
 at underground coal mines. 
 
 NONFATAL ACCIDENTS 
 
 Of the 5,489 nonfatal accidents that occurred at the 
 surface at underground coal mines, 125 or 2.3% were 
 electrical in nature as shown in table 14. Electrical repair 
 
 and maintenance was the activity most commonly engaged 
 in when the nonfatal incident occurred (69 of 125 cases). 
 In 67 of 125 cases, the source of injury was electrical ap- 
 paratus and in 24 of 125 cases, conductors, cables, and 
 trolley poles were the source. Electrical arc burns resulted 
 in 62 of 125 cases with the hands being the part of the 
 body most subject to injury. Mechanics and electricians 
 led in the number of nonfatal electrical injuries incurred 
 during this time period, with the most frequently injured 
 part of the body being the hand. In almost 50% of these 
 accidents, the employee had less than 5 years of experience 
 at the specific job being performed when the accident 
 occurred (63 of 125 cases). The average age of the victims 
 was 37. 
 
 Tables 15 through 18 summarize the pertinent informa- 
 tion relative to nonfatal accidents at the surface at under- 
 ground coal mines. 
 
 Table 10.-Electrical fatalities versus total fatalities 
 at the surface at underground coal mines 
 
 "Year 
 
 1980 . . 
 
 1981 . . 
 
 1982 . . 
 
 1983 . . 
 
 1984 . . 
 
 1985 . . 
 Total 
 
 Electrical 
 
 Total 
 
 fatalities 
 
 fatalities 
 
 
 
 8 
 
 1 
 
 9 
 
 2 
 
 12 
 
 2 
 
 7 
 
 1 
 
 2 
 
 2 
 
 7 
 
 45 
 
 Table 1 1 .-Summary of fatal electrical accidents at the surface at underground coal mines 
 
 1980 
 
 1981 
 
 1982 
 
 1983 
 
 1984 
 
 1985 
 
 Total 
 
 Activity when accident occurred: 
 
 Maintain, repair electrical equipment 
 
 Handle supplies, material 
 
 Maintain machine 
 
 Getting on-off equipment 
 
 Source of injury: 
 
 Electrical apparatus . 
 
 Conductors, cables, trolley poles . . . 
 
 Transformers, converters 
 
 Job title: 
 
 Electrician 
 
 Mechanic 
 
 Master electrician 
 
 Mine foreman 
 
 Truck driver 
 
 Tipple operator 
 
 Machine: 
 
 Not recorded in MSHA data base . . . 
 
 Machine, not elsewhere classified . . . 
 
 Fan 
 
 Ore haulage truck, off-highway 
 
 Nature of injury: Electric shock, 
 
 electrocution ^ ^.__,^_ 
 
 Accident type: Electric current , 
 
 Part of body: Body systems , 
 
 
 
 1 
 
 1 
 
 1 
 
 1 
 
 1 
 
 5 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 1 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 1 
 
 1 
 
 1 
 
 1 
 
 5 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 2 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 1 
 
 1 
 
 
 
 
 
 
 
 2 
 
 
 
 
 
 
 
 
 
 1 
 
 1 
 
 2 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 1 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 1 
 
 1 
 
 1 
 
 4 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 2 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 1 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 2 
 
 2 
 
 1 
 
 2 
 
 8 
 
 
 
 1 
 
 2 
 
 2 
 
 1 
 
 2 
 
 8 
 
 
 
 1 
 
 2 
 
 2 
 
 1 
 
 2 
 
 8 
 
12 
 
 en 
 
 I- 
 z: 
 
 LU 
 Q 
 t-i 
 (_> 
 
 O 
 
 a: 
 
 uj 
 
 CD 
 
 KEY 
 Fatal 
 
 /^^] Nonfatal 
 
 1988 1381 1982 1983 1984 1985 
 
 Figure 2.-Fatal and nonfatal electrical accident* at the surface at underground coal mines, 1980-85. 
 
13 
 
 Table 12.-Years of experience 1 at specific job when fatal accident occurred 
 at the surface at underground coal mines 
 
 Year — —-——- q. 5 g_ 10 11 _ 15 16-2Q per 20 
 
 1980 
 
 1981 1 
 
 1982 1 1 
 
 1983 1 1 
 
 1984 1 
 
 1985 J) 1 1_ 
 
 Total 3 3 1 1 
 
 1 Data do not represent total mining experience of employees, only experience at the specific 
 job being performed when accident occurred. 
 
 Table 13.-Times when electrical fatalities occurred at the surface 
 at underground coal mines 
 
 1980 
 
 1981 1982 1983 1984 
 
 1985 
 
 Total 
 
 11:01 a.m. to 1:01 p.m. 
 
 1:01 to 3:01 p.m 
 
 3:01 to 5:01 p.m 
 
 5:01 to 7:01 p.m 
 
 7:01 to 9:01 p.m 
 
 9:01 to 11:01 p.m. . . . 
 11:01 p.m. to 1:01 a.m. 
 
 1:01 to 3:01 a.m 
 
 3:01 to 5:01 a.m 
 
 5:01 to 7:01 a.m 
 
 7:01 to 9:01 a.m 
 
 9:01 to 11:01 a.m. . . . 
 Unknown 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 2 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 2 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 NOTE.-From 1980 through 1985, 6 of 8 accidents occurred in the afternoon. 
 
 Table 14.- Electrical nonfatal accidents versus total nonfatal accidents at the 
 surface at underground coal mines 
 
 Year 
 
 Electrical nonfatal 
 accidents 
 
 Total nonfatal 
 accidents 
 
 1980 .. 
 
 1981 .. 
 
 1982 .. 
 
 1983 .. 
 
 1984 .. 
 
 1985 .. 
 Total 
 
 31 
 27 
 20 
 13 
 18 
 16 
 
 1,400 
 
 1,124 
 
 1,018 
 
 617 
 
 693 
 
 637 
 
 125 
 
 5,489 
 
14 
 
 Table 1 5.-Summary of nonfatal electrical accidents at the surface at underground coal mines 
 
 1980 
 
 1981 
 
 1982 
 
 1983 
 
 1984 
 
 1985 
 
 Total 
 
 Activity when accident occurred: 
 
 Maintain, repair electrical equipment . . 
 
 Maintain machine 
 
 Handle supplies, material 
 
 Use handtools 
 
 Rerail equipment 
 
 Operate locomotive 
 
 Inspect machinery 
 
 Move power cable 
 
 Operate surface equipment 
 
 Idle 
 
 Escaping a hazard 
 
 Cleanup 
 
 Operate mill equipment 
 
 Operate power shovel 
 
 Operate jitney 
 
 Weld, cut 
 
 Walk, run 
 
 Move equipment 
 
 Use powered handtools 
 
 Not defined 
 
 Source of injury: 
 
 Electrical apparatus 
 
 Conductors, cables, trolley poles 
 
 Acids, alkalies (wet cement) 
 
 Ground (surface) 
 
 Flame, fire, smoke 
 
 Transformers, converters 
 
 Underground narrow-gage railcars 
 
 Motors 
 
 Mine jeep, jitney 
 
 Metal (pipe, wire, nails, etc.) 
 
 Surface mining machines 
 
 Generators 
 
 Noxious gases, not elsewhere classified 
 
 Cranes, derricks 
 
 Space heaters 
 
 Passenger cars, trucks 
 
 Metal covers, guards, gates, roof bolt 
 plates 
 
 Machines, not elsewhere classified, 
 
 office machines 
 
 Job title: 
 
 Mechanic 
 
 Electrician 
 
 Laborer 
 
 Maintenance foreman 
 
 Mine foreman 
 
 Motorman 
 
 Unknown 
 
 Shuttle car operator 
 
 Superintendent 
 
 Master electrician 
 
 Outside foreman 
 
 Communications repair 
 
 Roof bolter 
 
 Labor foreman 
 
 Drill helper 
 
 Inspector 
 
 Brattice man 
 
 Machinist 
 
 Fire boss 
 
 Belt man 
 
 Welder 
 
 Loading machine operator 
 
 Electrical engineer 
 
 Scoop car operator 
 
 Trackman 
 
 Truck driver 
 
 Machine: 
 
 Not recorded in MSHA data base 
 
 Locomotive, rail-mounted; lorry car . . . 
 
 19 
 
 16 
 
 6 
 
 8 
 
 12 
 
 8 
 
 69 
 
 7 
 
 1 
 
 5 
 
 1 
 
 1 
 
 
 
 15 
 
 1 
 
 3 
 
 4 
 
 
 
 2 
 
 2 
 
 12 
 
 
 
 2 
 
 
 
 
 
 1 
 
 2 
 
 5 
 
 2 
 
 
 
 2 
 
 
 
 
 
 
 
 4 
 
 1 
 
 1 
 
 
 
 
 
 
 
 1 
 
 3 
 
 
 
 
 
 
 
 
 
 
 
 2 
 
 2 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 2 
 
 
 
 
 
 1 
 
 1 
 
 
 
 
 
 2 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 12 
 
 17 
 
 10 
 
 6 
 
 11 
 
 11 
 
 67 
 
 9 
 
 6 
 
 2 
 
 2 
 
 3 
 
 2 
 
 24 
 
 2 
 
 1 
 
 2 
 
 1 
 
 
 
 
 
 6 
 
 1 
 
 1 
 
 
 
 
 
 2 
 
 1 
 
 5 
 
 
 
 1 
 
 2 
 
 1 
 
 
 
 
 
 4 
 
 1 
 
 
 
 1 
 
 
 
 
 
 1 
 
 3 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 2 
 
 2 
 
 
 
 
 
 
 
 
 
 
 
 2 
 
 2 
 
 
 
 
 
 
 
 
 
 
 
 2 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 2 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 13 
 
 2 
 
 3 
 
 3 
 
 3 
 
 5 
 
 29 
 
 5 
 
 4 
 
 5 
 
 1 
 
 5 
 
 5 
 
 25 
 
 3 
 
 2 
 
 4 
 
 3 
 
 3 
 
 2 
 
 17 
 
 1 
 
 3 
 
 
 
 1 
 
 2 
 
 
 
 7 
 
 1 
 
 4 
 
 
 
 
 
 
 
 
 
 5 
 
 
 
 2 
 
 1 
 
 1 
 
 
 
 1 
 
 5 
 
 1 
 
 3 
 
 
 
 
 
 1 
 
 
 
 5 
 
 
 
 2 
 
 1 
 
 
 
 1 
 
 
 
 4 
 
 3 
 
 
 
 
 
 
 
 
 
 
 
 3 
 
 
 
 
 
 
 
 1 
 
 1 
 
 1 
 
 3 
 
 
 
 2 
 
 
 
 
 
 
 
 
 
 2 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 2 
 
 
 
 1 
 
 1 
 
 
 
 
 
 
 
 2 
 
 
 
 
 
 2 
 
 
 
 
 
 
 
 2 
 
 
 
 
 
 2 
 
 
 
 
 
 
 
 2 
 
 
 
 
 
 
 
 
 
 1 
 
 1 
 
 2 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 16 
 
 12 
 
 9 
 
 4 
 
 12 
 
 9 
 
 62 
 
 4 
 
 3 
 
 4 
 
 2 
 
 
 
 2 
 
 15 
 
Table 15.-Summary of nonfatal electrical accidents at the surface at underground coal mines-Continued 
 
 15 
 
 1980 
 
 1981 
 
 1982 
 
 1983 
 
 1984 
 
 1985 
 
 Total 
 
 Machine-Continued 
 
 Nonpowered handtools 3 5 1 1 10 
 
 Man trip, man car, jeep, personnel 
 
 carrier, etc 4 2 1 7 
 
 Conveyor, all types; belt feeder 2 1 2 5 
 
 Machine, not elsewhere classified 2 1 1 4 
 
 Front-end loader, tractor-shovel, 
 
 highlift, skip-loader, etc 2 1 3 
 
 Load-haul-dump, scoop, tram, ram 
 
 car, etc 1 1 1 3 
 
 Welder 1 1 1 3 
 
 Powered handtools 1 1 2 
 
 Crane, derrick 2 2 
 
 Service truck, pickup truck (not ore 
 
 haulage) 1 1 2 
 
 Rock duster 1 1 
 
 Continuous miner, tunnel borer 1 1 
 
 Fan 1 1 
 
 Jumbo carriage-mounted drills on rails, 
 
 tracks, tires 1 1 
 
 Compressor 1 1 
 
 Pump 1 1 
 
 Cutting machine mining only, chain 
 
 cutter 1 1 
 
 Nature of injury: 
 
 Electrical arc burn 12 17 10 6 9 9 63 
 
 Electrical burn (contact burn) 8 4 1 4 4 21 
 
 Electrical shock (electrocution) 5 1 3 2 1 2 14 
 
 Chemical burn 2 1 2 1 6 
 
 Burn or scald (heat) 2 3 1 6 
 
 Multiple injuries 1 1 2 4 
 
 Laceration, cut, puncture 1 1 1 1 4 
 
 Sprain, strain 1 1 2 
 
 Bruise 1 
 
 Poisoning 1 
 
 Dust in eyes 1 
 
 Fracture 1« 
 
 Unclassified 1 
 
 Accident type: 
 
 Rash burns, electric 12 17 8 6 9 9 61 
 
 Electric current 13 5 4 3 6 6 37 
 
 Absorption of toxics 2 1 2 1 6 
 
 Contact with hot substance 2 3 1 6 
 
 Struck against stationary object 1 1 2 
 
 Fall from ladder 1 1 2 
 
 Struck by flying object 1 1 2 
 
 Fall from machine 2 2 
 
 Caught in, under, or between a moving 
 
 and a stationary object 1 
 
 Fall to working surface 1 
 
 Flash burns, welding 1 
 
 Fall down raise, shaft 1 
 
 Struck by, not elsewhere classified 1 
 
 Inhalation of toxics 1 
 
 Fall against object 1 
 
 Part of body: 
 
 Hand 7 9 6 2 2 5 31 
 
 Multiple injuries 6 6 5 1 4 4 26 
 
 Eyes 4 5 3 2 1 2 17 
 
 Body systems 5 1 3 3 1 2 15 
 
 Upper extremities, multiple 2 2 2 4 1 11 
 
 Fingers 1 1 3 1 6 
 
 Arm 1 1 2 1 5 
 
 Back 1 1 1 3 
 
 Wrist 1 1 2 
 
 Face 2 2 
 
 Forearm 2 2 
 
 Leg 1 
 
 Ankle 1 
 
 Head 1 
 
 Nose 1 
 
 Knee Q 1 
 
16 
 
 Table 16.-Years of experience 1 at specific job when nonfatal electrical 
 accident occurred at the surface at underground coal mines 
 
 Year 0-5 6-10 11-15 16-20 Over 20 Not listed 
 
 1980 15 10 2 1 3 
 
 1981 14 7 1 1 1 3 
 
 1982 12 3 1 1 1 2 
 
 1983 5 7 1 
 
 1984 9 4 4 1 
 
 1985 _8 3 2 1 2 
 
 Total 63 34 U 4 3 10 
 
 ! Data do not represent total mining experience of employees, only experience at the specific 
 job being performed when accident occurred. 
 
 Table 17. -Times when electrical nonfatal accidents occurred at the surface 
 at underground coal mines 
 
 1980 1981 1982 1983 1984 1985 
 
 Total 
 
 11:01 a.m. to 1:01 p.m. 
 
 1:01 to 3:01 p.m 
 
 3:01 to 5:01 p.m 
 
 5:01 to 7:01 p.m 
 
 7:01 to 9:01 p.m 
 
 9:01 to 11:01 p.m. 
 
 11:01 p.m. to 1:01 a.m. 
 
 1:01 to 3:01 a.m 
 
 3:01 to 5:01 a.m 
 
 5:01 to 7:01 a.m 
 
 7:01 to 9:01 a.m 
 
 9:01 to 11:01 a.m 
 
 Unknown 
 
 2 
 
 5 
 
 6 
 
 2 
 
 2 
 
 1 
 
 18 
 
 7 
 
 5 
 
 3 
 
 1 
 
 3 
 
 
 
 19 
 
 4 
 
 3 
 
 1 
 
 
 
 2 
 
 4 
 
 14 
 
 3 
 
 1 
 
 1 
 
 
 
 2 
 
 2 
 
 9 
 
 2 
 
 1 
 
 
 
 2 
 
 
 
 2 
 
 7 
 
 2 
 
 2 
 
 
 
 
 
 1 
 
 1 
 
 6 
 
 1 
 
 
 
 
 
 1 
 
 1 
 
 
 
 3 
 
 
 
 
 
 4 
 
 1 
 
 
 
 
 
 5 
 
 
 
 1 
 
 2 
 
 
 
 2 
 
 
 
 5 
 
 1 
 
 2 
 
 1 
 
 1 
 
 1 
 
 2 
 
 8 
 
 4 
 
 3 
 
 2 
 
 3 
 
 1 
 
 3 
 
 16 
 
 4 
 
 4 
 
 
 
 2 
 
 3 
 
 
 
 13 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 2 
 
 NOTE.-From 1980 through 1985, 63 of 123 accidents occurred in the morning. In 2 cases, times 
 were not listed and are shown as unknown. 
 
 Table 18.-Total days lost per year as a result of nonfatal electrical accidents 
 at the surface at underground coal mines 
 
 Year 
 
 1980 
 
 1981 
 
 1982 
 
 1983 
 
 1984 
 
 1985 
 
 Total 
 
 Accidents 
 
 Days lost 
 
 31 
 27 
 20 
 13 
 18 
 16 
 
 429 
 366 
 233 
 185 
 553 
 339 
 
 125 
 
 2,105 
 
17 
 
 ELECTRICAL ACCIDENTS IN UNDERGROUND METAL-NONMETAL MINES 
 
 Figure 3 is a graphical presentation of electrical fatal 
 and nonfatal accidents in underground metal-nonmetal 
 mines. 
 
 FATALITIES 
 
 Of 110 fatalities that occurred in underground metal- 
 nonmetal mines from 1980 through 1985, 2% were elec- 
 trical in nature (table 19). One fatality occurred while an 
 electrician was performing electrical repair and mainte- 
 nance on electrical apparatus; the other victim was a miner 
 engaging in the welding and cutting of electrical apparatus. 
 Both victims suffered electrocution. Both individuals had 
 less than 5 years of experience at the specific job they were 
 performing when the fatality occurred and both accidents 
 occurred in the morning. One victim had been employed 
 in that specific capacity for only 24 weeks. The other 
 individual had 2 years 24 weeks of experience in that ca- 
 pacity. The average age of the victims was 29. Table 20 
 summarizes the pertinent information in this category. 
 
 NONFATAL ACCIDENTS 
 
 Of the 14,959 nonfatal accidents that occurred in un- 
 derground metal-nonmetal mines, less than 1% were elec- 
 trical in nature as identified in table 21. Electrical repair 
 and maintenance was the activity most commonly engaged 
 in when the nonfatal incident occurred (39 of 91 cases). 
 
 In 38 of 91 cases, the source of injury was electrical ap- 
 paratus and in 26 of 91 cases, conductors, cables, and 
 trolley poles were the source of the injury. Electricians 
 incurred the greatest number of injuries (20 of 91 cases). 
 Twenty-nine nonfatal electrical shocks occurred during this 
 time period and 28 electrical arc burns. Again, as in all 
 previous categories, the part of the body most frequently 
 injured in nonfatal accidents was the hand. Also, as in all 
 previous categories, the majority of the employees injured 
 had less than 5 years experience at the specific job they 
 were performing when the injury occurred (64% or 58 of 
 91 cases). The average age of the victims was 35. 
 
 Tables 22 through 25 summarize the pertinent informa- 
 tion relative to nonfatal electrical accidents in underground 
 metal-nonmetal mines. 
 
 Table 19.-Electrical fatalities versus total fatalities 
 in underground metal-nonmetal mines 
 
 "Year 
 
 1980 . . 
 
 1981 . . 
 
 1982 . . 
 
 1983 . . 
 
 1984 . . 
 
 1985 . . 
 Total 
 
 Electrical 
 
 Total 
 
 fatalities 
 
 fatalities 
 
 
 
 20 
 
 1 
 
 29 
 
 
 
 23 
 
 1 
 
 11 
 
 
 
 14 
 
 
 
 13 
 
 110 
 
 Table 20.-Summary of fatal electrical accidents in underground metal-nonmetal mines 
 
 1980 
 
 1981 
 
 1982 
 
 1983 
 
 1984 
 
 1985 
 
 Total 
 
 Activity when accident occurred: 
 
 Weld, cut 
 
 Maintain, repair electrical equipment 
 Source of injury: Electrical apparatus . 
 Job title: 
 
 Miner 
 
 Electrician 
 
 Mining method: 
 
 Other 
 
 Conventional, stope 
 
 Location: Other underground 
 
 Machine: 
 
 Welder 
 
 Unknown 
 
 Nature of injury: Electric shock, 
 
 electrocution 
 
 Accident type: Electric current 
 
 Part of body: Body systems 
 
18 
 
 cr> 
 
 35t 
 
 30-- 
 
 LU 
 
 
 Q 
 
 
 
 20 
 
 o 
 
 
 <r 
 
 
 LL. 
 
 
 o 
 
 
 IV 
 
 15 
 
 LU 
 
 
 OQ 
 
 
 10-- 
 
 5" 
 
 
 
 8 
 
 KEY 
 Fatal 
 
 '////A Nonfatal 
 
 
 
 1980 1981 1982 1983 1984 1985 
 
 Figure 3.- Fata I and nonfatal electrical accidents in underground metal-nonmetal mines, 1980-85. 
 
 Table 21 .-Electrical nonfatal accidents versus total nonfatal accidents 
 in underground metal-nonmetal mines 
 
 Year Becfrteai nonfatal Total nonfatal 
 accidents accidents 
 
 1980 26 4,525 
 
 1981 31 4,138 
 
 1982 11 2,207 
 
 1983 7 1,522 
 
 1984 11 1,356 
 
 1985 5 1,211 
 
 Total 91 14,959 
 
Table 22.-Summary of nonfatal electrical accidents in underground metal-nonmetal mines 
 
 19 
 
 1980 
 
 1981 
 
 1982 
 
 1983 
 
 1984 
 
 1985 
 
 Total 
 
 Activity when accident occurred: 
 
 Maintain, repair electrical equipment 
 
 Handle supplies, material 
 
 Maintain machine 
 
 Rerail equipment 
 
 Welding, cutting 
 
 Caging 
 
 Operate locomotive 
 
 Idle 
 
 Drill face, rib, side 
 
 Escaping a hazard 
 
 Operate slusher 
 
 Get on-off equipment 
 
 Use handtools 
 
 Use bull dozer 
 
 Walk, run 
 
 Use continuous miner 
 
 Operate-ride mantrip 
 
 Use powered handtools 
 
 Bolt roof 
 
 Bolt roof, insert bolt 
 
 Couple mine cars 
 
 Operate underground equipment . . . 
 
 Move power cable 
 
 Climb raise, shaft 
 
 Use blow gun 
 
 Observe operations 
 
 Use cutting machine 
 
 Source of injury: 
 
 Electrical apparatus 
 
 Conductors, cables, trolley poles . . . 
 
 Underground mining machines 
 
 Machines, office machines 
 
 Flame, fire, smoke 
 
 Elevators, cages, skips 
 
 Acids, alkalies (wet cement) 
 
 Surface mining machines 
 
 Vehicles 
 
 Passenger cars, trucks 
 
 Transformers, converters 
 
 Metal (pipe, wire, nails, etc.) 
 
 Powered handtools 
 
 Drill, percussive 
 
 Molten metal 
 
 Floor, bottom 
 
 Coal and petroleum products 
 
 Apparel 
 
 Broken rock, coal waste 
 
 Welder 
 
 Miscellaneous 
 
 Job title: 
 
 Electrician 
 
 Mechanic 
 
 Miner 
 
 Motorman 
 
 Laborer, muck machine operator . . . 
 
 Labor foreman 
 
 Blaster 
 
 Utility man 
 
 Trainee 
 
 Unknown 
 
 Mine foreman 
 
 Mechanic, repairman 
 
 Master electrician 
 
 Continuous miner 
 
 Jackster 
 
 Maintenance foreman 
 
 Grizzly man 
 
 Welder, cement man , 
 
 Master mechanic 
 
 Shuttle car operator 
 
 Beltman , 
 
 10 
 
 12 
 
 5 
 
 3 
 
 6 
 
 3 
 
 39 
 
 2 
 
 2 
 
 2 
 
 1 
 
 
 
 
 
 7 
 
 3 
 
 2 
 
 
 
 1 
 
 
 
 
 
 6 
 
 1 
 
 2 
 
 
 
 
 
 1 
 
 
 
 4 
 
 1 
 
 
 
 1 
 
 2 
 
 
 
 
 
 4 
 
 2 
 
 1 
 
 
 
 
 
 
 
 
 
 3 
 
 2 
 
 1 
 
 
 
 
 
 
 
 
 
 3 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 2 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 2 
 
 
 
 2 
 
 
 
 
 
 
 
 
 
 2 
 
 1 
 
 1 
 
 
 
 
 
 
 
 
 
 2 
 
 
 
 1 
 
 1 
 
 
 
 
 
 
 
 2 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 11 
 
 17 
 
 3 
 
 3 
 
 4 
 
 
 
 38 
 
 7 
 
 8 
 
 5 
 
 
 
 5 
 
 1 
 
 26 
 
 
 
 1 
 
 1 
 
 
 
 
 
 1 
 
 3 
 
 
 
 
 
 1 
 
 2 
 
 
 
 
 
 3 
 
 1 
 
 1 
 
 
 
 
 
 
 
 1 
 
 3 
 
 2 
 
 
 
 
 
 
 
 
 
 
 
 2 
 
 1 
 
 1 
 
 
 
 
 
 
 
 
 
 2 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 2 
 
 
 
 
 
 
 
 
 
 
 
 2 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 6 
 
 4 
 
 4 
 
 1 
 
 3 
 
 2 
 
 20 
 
 2 
 
 4 
 
 
 
 2 
 
 1 
 
 
 
 9 
 
 3 
 
 3 
 
 2 
 
 
 
 
 
 
 
 8 
 
 1 
 
 5 
 
 
 
 
 
 1 
 
 
 
 7 
 
 2 
 
 2 
 
 1 
 
 
 
 1 
 
 
 
 6 
 
 1 
 
 1 
 
 
 
 2 
 
 
 
 
 
 4 
 
 1 
 
 
 
 1 
 
 
 
 
 
 1 
 
 3 
 
 
 
 1 
 
 
 
 
 
 1 
 
 1 
 
 3 
 
 1 
 
 2 
 
 
 
 
 
 
 
 
 
 3 
 
 1 
 
 1 
 
 
 
 
 
 
 
 1 
 
 3 
 
 1 
 
 2 
 
 
 
 
 
 
 
 
 
 3 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 2 
 
 1 
 
 
 
 
 
 
 
 1 
 
 
 
 2 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 2 
 
 
 
 2 
 
 
 
 
 
 
 
 
 
 2 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
20 
 
 Table 22.-Summary of nonfatal electrical accidents In underground metal-nonmetal mines-Continued 
 
 1980 
 
 1981 
 
 1982 
 
 1983 
 
 1984 
 
 1985 
 
 Total 
 
 Job title-Continued 
 
 Mucking machine 
 
 Pumper 
 
 Barge attendant 
 
 Oiler, greaseman 
 
 Cutting machine operator 
 
 Drift miner 
 
 Wireman 
 
 Loading machine operator 
 
 Machine: 
 
 Unknown 
 
 Machine, not elsewhere classified .... 
 
 Welder 
 
 Pump 
 
 Rock drill, jackleg, jackhammer, 
 
 drifter, etc 
 
 Nonpowered handtools 
 
 Roof bolter 
 
 Man trip, man car, jeep, personnel 
 
 carrier, etc 
 
 Powered handtools 
 
 Hydraulic, electric core drills 
 
 Load-haul-dump, scoop tram, 
 
 ram car, etc 
 
 Continuous miner, tunnel borer 
 
 Locomotive, rail-mounted; lorry car . . 
 Service truck, pickup, utility truck 
 
 (not ore haulage) 
 
 Dozer, crawler tractor 
 
 Pneumatic-blasting agent loader .... 
 Ore-haulage truck, off-highway or 
 
 underground 
 
 Cutting machine (mining only), chain 
 
 cutter 
 
 Skip, elevator, cage 
 
 Shuttle car 
 
 Conveyor, all types; belt feeder 
 
 Loading machine, gathering-arm, etc . 
 Slusher, scraper hoist, scram, etc ... . 
 Jumbo carriage-mounted drills on rails 
 
 tracks, tires 
 
 Fan 
 
 Sizing machine 
 
 Nature of injury: 
 
 Electrical shock (electrocution) 
 
 Electrical arc burn 
 
 Electrical burn (contact burn) 
 
 Asphyxia 
 
 Burn or scald (heat) 
 
 Chemical burn 
 
 Multiple injuries 
 
 Laceration, cut, puncture 
 
 Sprain, strain 
 
 Bruise 
 
 Scratches, abrasions 
 
 Fracture 
 
 Other, not elsewhere classified 
 
 Part of body: 
 
 Body systems 
 
 Hand 
 
 Eyes 
 
 Multiple injuries 
 
 Upper extremities, multiple 
 
 Ankle 
 
 Fingers 
 
 Arm 
 
 Wrist 
 
 Forearm 
 
 Foot 
 
 Body parts, not elsewhere classified . . 
 
 Shoulders 
 
 Knee 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 5 
 
 1 
 
 3 
 
 2 
 
 11 
 
 
 
 
 
 
 
 3 
 
 1 
 
 
 
 4 
 
 
 
 
 
 1 
 
 2 
 
 
 
 
 
 3 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 2 
 
 
 
 
 
 
 
 
 
 1 
 
 1 
 
 2 
 
 
 
 
 
 2 
 
 
 
 
 
 
 
 2 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 2 
 
 1 
 
 
 
 
 
 
 
 
 
 3 
 
 2 
 
 1 
 
 
 
 
 
 
 
 
 
 3 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 2 
 
 2 
 
 
 
 
 
 
 
 
 
 4 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 2 
 
 1 
 
 
 
 
 
 
 
 
 
 3 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 4 
 
 12 
 
 5 
 
 4 
 
 3 
 
 1 
 
 29 
 
 8 
 
 8 
 
 4 
 
 2 
 
 6 
 
 
 
 28 
 
 5 
 
 6 
 
 2 
 
 1 
 
 1 
 
 2 
 
 17 
 
 3 
 
 1 
 
 
 
 
 
 
 
 
 
 4 
 
 2 
 
 
 
 
 
 
 
 
 
 1 
 
 3 
 
 1 
 
 1 
 
 
 
 
 
 1 
 
 
 
 3 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 7 
 
 13 
 
 5 
 
 4 
 
 3 
 
 1 
 
 33 
 
 3 
 
 4 
 
 2 
 
 1 
 
 1 
 
 1 
 
 12 
 
 5 
 
 3 
 
 1 
 
 1 
 
 2 
 
 
 
 12 
 
 1 
 
 2 
 
 1 
 
 1 
 
 4 
 
 1 
 
 10 
 
 2 
 
 3 
 
 2 
 
 
 
 1 
 
 1 
 
 9 
 
 2 
 
 1 
 
 
 
 
 
 
 
 
 
 3 
 
 1 
 
 1 
 
 
 
 
 
 
 
 
 
 2 
 
 1 
 
 1 
 
 
 
 
 
 
 
 
 
 2 
 
 2 
 
 
 
 
 
 
 
 
 
 
 
 2 
 
 1 
 
 1 
 
 
 
 
 
 
 
 
 
 2 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 . 1 
 
21 
 
 Table 23.-Years of experience 1 at specific job when nonfatal electrical accident 
 occurred in underground metal-nonmetal mines 
 
 Year 0-5 6-10 11-15 16-20 Over 20 Unknown 
 
 1980 18 4 2 2 
 
 1981 19 7 1 2 2 
 
 1982 10 1 
 
 1983 6 1 
 
 1984 5 3 1 2 
 
 1985 __0 3 CI 2 
 
 Total 58 17 2 1 4 9 
 
 'Data do not represent total mining experience of employees, only experience at the specific 
 job being performed when accident occurred. 
 
 Table 24.-Times when electrical nonfatal accidents occurred 
 in underground metal-nonmetal mines 
 
 1980 1981 
 
 1982 1983 
 
 1984 
 
 1985 
 
 Total 
 
 11:01 a.m. to 1:01 p.m 1 3 4 1 2 3 14 
 
 1:01 to 3:01 p.m 2 5 1 8 
 
 3:01 to 5:01 p.m 3 1 2 1 7 
 
 5:01 to 7:01 p.m 1 2 1 3 7 
 
 7:01 to 9:01 p.m 1 2 1 4 
 
 9:01 to 11:01 p.m 1 1 
 
 11:01 p.m. to 1:01 a.m 1 1 
 
 1:01 to 3:01 a.m 2 3 2 7 
 
 3:01 to 5:01 a.m 1 1 1 1 4 
 
 5:01 to 7:01 a.m 1 1 2 
 
 7:01 to 9:01 a.m 3 6 1 3 13 
 
 9:01 to 11:01 a.m 8 7 3 18 
 
 Unknown 2 1 1 1 5 
 
 NOTE.-From 1980 through 1985, 55 of 86 accidents occurred in the morning, 
 were not listed and are shown as unknown. 
 
 In 5 cases times 
 
 Table 25.-Total days lost per year as a result of nonfatal electrical accidents 
 in underground metal-nonmetal mines 
 
 Year Accidents Days lost 
 
 1980 26 215 
 
 1981 31 520 
 
 1982 11 267 
 
 1983 7 39 
 
 1984 11 71 
 
 1985 5 237 
 
 Total 91 1,349 
 
22 
 
 ELECTRICAL ACCIDENTS AT THE SURFACE 
 AT UNDERGROUND METAL-NONMETAL MINES 
 
 Figure 4 is a graphical presentation of electrical acci- 
 dents in underground metal-nonmetal mines at the surface, 
 including associated shops, yards, and tipple when located 
 at the mine. 
 
 FATALITIES 
 
 Of 17 fatalities that occurred in surface at underground 
 metal-nonmetal mines, four were electrical in nature as 
 identified (table 26). Each accident occurred while the 
 victim was performing electrical maintenance and repair. 
 All victims suffered electrocution. Three of the four indi- 
 viduals had less than 5 years of experience at the specific 
 job they were performing when the accident occurred. 
 The average age of the victims was 39. Tables 27 through 
 29 summarize the pertinent information in this category. 
 
 NONFATAL ACCIDENTS 
 
 Of the 2,281 nonfatal accidents that occurred at the 
 surface at underground metal-nonmetal mines, 34 or 1.5% 
 were electrical in nature (table 30). Electrical repair and 
 maintenance was the activity most commonly engaged in 
 when the nonfatal incident occurred (19 of 34 cases). 
 
 Electrical apparatus was the most common source of injury 
 (20 of 34 cases) and electrical arc burns were the 
 predominant injury. This is the first category in which 
 multiple injuries outnumbered hand injuries as the part of 
 the body most commonly injured. In 59% of these acci- 
 dents, the employees had less than 5 years of experience 
 at the specific job they were performing when the accident 
 occurred (20 of 34 cases). The average age of the victims 
 was 39. 
 
 Tables 31 through 34 summarize the pertinent informa- 
 tion relative to nonfatal electrical accidents at the surface 
 of underground metal-nonmetal mines. 
 
 Table 26.-Electrical fatalities versus total fatalities at the 
 surface at underground metal-nonmetal mines 
 
 __ 
 
 1980 . . 
 
 1981 . . 
 
 1982 . . 
 
 1983 . . 
 
 1984 . . 
 
 1985 . . 
 Total 
 
 Electrical 
 
 Total 
 
 fatalities 
 
 fatalities 
 
 
 
 3 
 
 
 
 2 
 
 1 
 
 3 
 
 1 
 
 1 
 
 1 
 
 5 
 
 1 
 
 3 
 
 17 
 
 Table 27.-Summary of fatal electrical accidents at the surface at underground metal-nonmetal mines 
 
 1980 
 
 1981 
 
 1982 
 
 1983 
 
 1984 
 
 1985 
 
 Total 
 
 Activity when accident occurred: 
 
 Maintain, repair electrical equipment 
 Source of injury: 
 
 Electrical apparatus 
 
 Generators 
 
 Conductors, cables, trolley poles . . . 
 Job title: 
 
 Electrician 
 
 Watchman 
 
 Machine: 
 
 Not recorded in MSHA data base . . . 
 
 Skip, elevator, cage 
 
 Nature of injury: Electric shock, 
 
 electrocution 
 
 Accident type: Electric current 
 
 Part of body: Body systems 
 
 
 
 
 
 1 
 
 1 
 
 
 
 
 
 2 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 1 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 1 
 
 1 
 
 1 
 
 
 
 3 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 1 
 
 
 
 
 
 1 
 
 
 
 1 
 
 1 
 
 3 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 1 
 
 1 
 
 1 
 
 4 
 
 
 
 
 
 1 
 
 1 
 
 1 
 
 1 
 
 4 
 
 
 
 
 
 1 
 
 1 
 
 1 
 
 1 
 
 4 
 
23 
 
 en 
 
 21 
 
 Ld 
 Q 
 
 <-> 
 
 14 
 
 12" 
 
 10" 
 
 8-- 
 
 Q£ 6' 
 
 Ld 
 
 
 
 ^l V/A 
 
 1 1 
 F 
 
 KEY 
 Fatal 
 
 Y///A Nonfatal 
 
 1980 
 
 1981 
 
 1982 
 
 1983 
 
 1984 
 
 1985 
 
 Figure 4.-Fatal and nonfatal electrical accidents at the surface at underground metal-nonmetal mines, 1980-85. 
 
24 
 
 Table 28.-Years of job experience 1 at specific job when fatal electrical accident 
 occurred at the surface at underground metal-nonmetal mines 
 
 Years 0-5 6-10 11-15 16-20 Over~20 
 
 1980 
 
 1981 
 
 1982 1 
 
 1983 1 
 
 1984 1 
 
 1985 _0 1 
 
 Total 3 1 
 
 x Data do not represent total mining experience of employees, only experience at the specific 
 job being performed when accident occurred. 
 
 Table 29.-Times when electrical fatal accidents occurred at the surface 
 at underground metal-nonmetal mines 
 
 1980 1981 1982 1983 1984 1985 Total 
 
 11:01 a.m. to 1:01 p.m 
 
 1:01 to 3:01 p.m 1 1 
 
 3:01 to 5:01 p.m 1 1 
 
 5:01 to 7:01 p.m 
 
 7:01 to 9:01 p.m 
 
 9:01 to 11:01 p.m 
 
 11:01 p.m. to 1:01 a.m 
 
 1:01 to 3:01 a.m 
 
 3:01 to 5:01 a.m 
 
 5:01 to 7:01 a.m 
 
 7:01 to 9:01 a.m 
 
 9:01 to 11:01 a.m 1 1 2_ 
 
 NOTE.-From 1980 through 1985, 2 accidents occurred in the morning and 2 accidents occurred 
 in the afternoon. 
 
 Table 30.-Electrical nonfatal accidents versus total nonfatal accidents at the 
 surface at underground metal-nonmetal mines 
 
 Year Electrical nonfatal Total nonfatal 
 accidents accidents 
 
 1980 13 651 
 
 1981 9 711 
 
 1982 7 322 
 
 1983 2 191 
 
 1984 2 215 
 
 1985 1 191 
 
 Total 34 2,281 
 
Table 31 .-Summary of nonfatal electrical accidents at the surface at underground metal-nonmetal mines 
 
 25 
 
 1980 
 
 1981 
 
 1982 
 
 1983 
 
 1984 
 
 1985 
 
 Total 
 
 Activity when accident occurred: 
 
 Maintain, repair electrical equipment . 
 
 Handle supplies, material 
 
 Maintain machine 
 
 Caging 
 
 Install and maintain ventilation 
 
 Use powered handtools 
 
 Idle 
 
 Move equipment 
 
 Operate surface equipment 
 
 Source of injury: 
 
 Electrical apparatus 
 
 Acids, alkalies (wet cement) 
 
 Conductors, cables, trolley poles .... 
 
 Drill, rotary 
 
 Movable ladders 
 
 Surface mining machines 
 
 Job title: 
 
 Electrician 
 
 Mechanic 
 
 Tipple operator 
 
 Stopping builder 
 
 Electrical helper 
 
 Maintenance foreman 
 
 Mine foreman 
 
 Drill operator 
 
 Truck driver 
 
 Laborer 
 
 Boney operator 
 
 Hoistman 
 
 Carpenter 
 
 Machine: 
 
 Not recorded in MSHA data base .... 
 
 Skip, elevator, cage 
 
 Service truck, pickup, utility truck 
 (not ore haulage) 
 
 Nonpowered handtools 
 
 Crane, derrick 
 
 Machine, not elsewhere classified .... 
 
 Pump 
 
 Jumbo carriage-mounted drills on rails, 
 tracks, tires 
 
 Compressor 
 
 Pneumatic blasting agent loader .... 
 
 Fan 
 
 Powered handtools 
 
 Load-haul-dump, scoop tram, 
 
 ram car, etc 
 
 Nature of injury: 
 
 Electrical arc burn 
 
 Chemical burns 
 
 Electrical shock (electrocution) 
 
 Electrical burn (contact burn) 
 
 Amputation 
 
 Accident type: 
 
 Rash burns, electric 
 
 Electric shock 
 
 Absorption of toxics 
 
 Part of body: 
 
 Multiple injuries 
 
 Eyes 
 
 Body systems 
 
 Hand 
 
 Face 
 
 Upper extremities, multiple 
 
 Fingers 
 
 Neck 
 
 Face, multiple parts 
 
 Chest 
 
 19 
 6 
 2 
 2 
 
 20 
 
 7 
 4 
 1 
 1 
 1 
 
 11 
 8 
 2 
 2 
 2 
 2 
 
 17 
 3 
 
 2 
 2 
 2 
 
 1 
 1 
 
 1 
 1 
 1 
 1 
 1 
 
 15 
 
 7 
 7 
 4 
 
 1 
 
 15 
 12 
 
 7 
 
 8 
 
 7 
 7 
 4 
 2 
 2 
 1 
 1 
 1 
 1 
 
26 
 
 Table 32.- Years of experience 1 at specific job when nonfatal accident occurred 
 at the surface at underground metal-nonmetal mines 
 
 Year 
 
 0-5 
 
 6-10 
 
 11-15 
 
 16-20 
 
 Over 20 
 
 Unknown 
 
 1980 6 2 2 3 
 
 1981 7 1 1 
 
 1982 6 1 
 
 1983 1 1 
 
 1984 1 1 
 
 1985 _0 1 
 
 Total 20 4 3 1 2 4_ 
 
 'Data do not represent total mining experience of employees, only experience at the specific 
 job being performed when accident occurred. 
 
 Table 33 -Times when electrical nonfatal accidents occurred at the 
 surface at underground metal-nonmetal mines 
 
 1980 1981 1982 1983 1984 1985 
 
 Total 
 
 11:01 a.m. to 1:01 p.m. 
 
 1:01 to 3:01 p.m 
 
 3:01 to 5:01 p.m 
 
 5:01 to 7:01 p.m 
 
 7:01 to 9:01 p.m 
 
 9:01 to 11:01 p.m. . . . 
 11:01 p.m. to 1:01 a.m. 
 
 1:01 to 3:01 a.m 
 
 3:01 to 5:01 a.m 
 
 5:01 to 7:01 a.m 
 
 7:01 to 9:01 a.m 
 
 9:01 to 11:01 a.m. . . . 
 Unknown 
 
 5 
 
 1 
 
 1 
 
 
 
 
 
 1 
 
 2 
 
 1 
 
 
 
 
 
 1 
 
 
 
 2 
 
 1 
 
 1 
 
 
 
 
 
 
 
 
 
 2 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 3 
 
 1 
 
 
 
 
 
 2 
 
 3 
 
 1 
 
 1 
 
 
 
 
 
 1 
 
 
 
 
 
 
 
 
 
 
 
 NOTE.-From 1980 through 1985, 18 of 33 accidents occurred in the morning. In 1 case, the 
 time was not listed and is shown as unknown. 
 
 Table 34.-Total days lost per year as a result of nonfatal electrical accidents 
 at the surface at underground metal-nonmetal mines 
 
 Year Accidents Days lost 
 
 1980 13 562 
 
 1981 9 359 
 
 1982 7 224 
 
 1983 2 112 
 
 1984 2 175 
 
 1985 1 3_ 
 
 Total 34 1,435 
 
27 
 
 COST INFORMATION 
 
 This section provides estimates of the costs of work- 
 related injuries for 1980 through 1985 for the following 
 four mining sectors: 
 
 Underground coal mines 
 
 Surface at underground coal mines 
 
 Underground metal-nonmetal mines 
 
 Surface at underground metal-nonmetal mines 
 
 The cost information for each year for these m inin g 
 sectors, including the costs of all fatalities, the costs of all 
 nonfatal accidents, and the combined costs of fatal and 
 nonfatal accidents are given in tables 35 through 58. 
 
 Table 35.-Cost information relative to electrical accidents in underground coal mines, 1980 
 
 Cost to- Element sum 
 
 FATALITIES (10) 
 
 Industry: 
 
 State Worker Compensation benefits $990,526 
 
 Postaccident production loss 794,181 
 
 Primary medical treatment 
 
 Union death or disability benefits 269,174 
 
 Fatal accident investigation 10,844 
 
 Total ^ . 2,064,725 
 
 Family: Loss of wages 2,632,499 
 
 Public sector: 
 
 Federal Social Security benefits 2,423,543 
 
 Fatal accident investigation 40,586 
 
 Total 2,464,129 
 
 Grand total 7,161,353 
 
 NONFATAL ACCIDENTS (303) 
 
 Industry: 
 
 State Worker Compensation benefits $203,521 
 
 Postaccident production loss 
 
 Primary medical treatment 209,813 
 
 Union death or disability benefits 8,520 
 
 Fatal accident investigation 
 
 Total 421,854 
 
 Family: Loss of wages 129,560 
 
 Public sector: 
 
 Federal Social Security benefits 6,021 
 
 Fatal accident investigation 
 
 Total 6,021 
 
 Grand total 557,435 
 
 COMBINED FATAL AND NONFATAL ACCIDENTS (313) 
 
 Industry: 
 
 State Worker Compensation benefits $1,194,047 
 
 Postaccident production loss 794,181 
 
 Primary medical treatment 209,813 
 
 Union death or disability benefits 277,694 
 
 Fatal accident investigation 10,844 
 
 Total 2,486,579 
 
 Family: Loss of wages 2,762,059 
 
 Public sector: 
 
 Federal Social Security benefits 2,429,564 
 
 Fatal accident investigation 40,586 
 
 Total 2,470,150 
 
 Grand total 7,718,788 
 
 % of total 
 
 13.8 
 11.1 
 
 .0 
 3.8 
 
 .2 
 
 28.8 
 36.8 
 
 33.8 
 .6 
 
 34.4 
 
 100.0 
 
 36.5 
 .0 
 
 37.6 
 
 1.5 
 
 .0 
 
 75.7 
 23.2 
 
 1.1 
 .0 
 
 1.1 
 
 100.0 
 
 13.8 
 
 10.3 
 
 2.7 
 
 3.6 
 
 .1 
 
 32.2 
 35.8 
 
 31.5 
 .5 
 
 32.0 
 
 100.0 
 
28 
 
 Table 36.-Cost information relative to electrical accidents in underground coal mines, 1981 
 
 Cost to- Element sum 
 
 FATALITIES (8) 
 
 Industry: 
 
 State Worker Compensation benefits $559,914 
 
 Postaccident production loss 2,469,647 
 
 Primary medical treatment 
 
 Union death or disability benefits 430,000 
 
 Fatal accident investigation 10,901 
 
 Total 3,470,462 
 
 Family: Loss of wages 3,146,706 
 
 Public sector: 
 
 Federal Social Security benefits 1,759,078 
 
 Fatal accident investigation 41,058 
 
 Total 1,800,136 
 
 Grand total 8,417,304 
 
 NONFATAL ACCIDENTS (243) 
 
 Industry: 
 
 State Worker Compensation benefits $158,692 
 
 Postaccident production loss 
 
 Primary medical treatment 178,795 
 
 Union death or disability benefits 8,581 
 
 Fatal accident investigation 
 
 Total 346,068 
 
 Family: Loss of wages 149,280 
 
 Public sector: 
 
 Federal Social Security benefits 
 
 Fatal accident investigation 
 
 Total 
 
 Grand total 557,435 ~ 
 
 COMBINED FATAL AND NONFATAL ACCIDENTS (251) 
 
 Industry: 
 
 State Worker Compensation benefits $718,606 
 
 Postaccident production loss 2,469,647 
 
 Primary medical treatment 178,795 
 
 Union death or disability benefits 438,581 
 
 Fatal accident investigation 10,901 
 
 Total 3,816,530 
 
 Family: Loss of wages 3,195,986 
 
 Public sector: 
 
 Federal Social Security benefits 1,759,078 
 
 Fatal accident investigation 41,058 
 
 Total 1,800,136 
 
 Grand total 8,912,652 
 
 % of total 
 
 6.7 
 29.3 
 
 .0 
 5.1 
 
 .1 
 
 41.2 
 37.4 
 
 20.9 
 .5 
 
 21.4 
 
 100.0 
 
 32.0 
 .0 
 
 36.1 
 
 1.8 
 
 .0 
 
 69.9 
 30.1 
 
 .0 
 .0 
 
 .0 
 
 100.0 
 
 8.1 
 
 27.7 
 
 2.0 
 
 4.9 
 
 .1 
 
 42.8 
 37.0 
 
 19.7 
 .5 
 
 20.2 
 
 100.0 
 
29 
 
 Table 37.-Cost information relative to electrical accidents in underground coal mines, 1982 
 
 Cost to- Element sum 
 
 FATALITIES (4) 
 
 Industry: 
 
 State Worker Compensation benefits $488,951 
 
 Postaccident production loss 1 ,033,751 
 
 Primary medical treatment 
 
 Union death or disability benefits , 230,133 
 
 Fatal accident investigation 5,779 
 
 Total 1,758,614 
 
 Family: Loss of wages 1,361,826 
 
 Public sector: 
 
 Federal Social Security benefits 545,572 
 
 Fatal accident investigation 19,256 
 
 Total 564,828 
 
 Grand total 3,685,268 ~ 
 
 NONFATAL ACCIDENTS (240) 
 
 Industry: 
 
 State Worker Compensation benefits $199,713 
 
 Postaccident production loss 
 
 Primary medical treatment 142,31 1 
 
 Union death or disability benefits 8,123 
 
 Fatal accident investigation 
 
 Total 350,147 
 
 Family: Loss of wages 162,120 
 
 Public sector: 
 
 Federal Social Security benefits 12,266 
 
 Fatal acclders* investigation 
 
 Total 12,266 
 
 Grand total 524,533 
 
 COMBINED FATAL AND NONFATAL ACCIDENTS (244) 
 
 Industry: 
 
 State Worker Compensation benefits $688,664 
 
 Postaccident production loss 1,033,751 
 
 Primary medical treatment 142,31 1 
 
 Union death or disability benefits 238,256 
 
 Fatal accident investigation 5,779 
 
 Total 2,108,761 
 
 Family: Loss of wages 1 ,523,946 
 
 Public sector: 
 
 Federal Social Security benefits 557,838 
 
 Fatal accident investigation 19,256 
 
 Total 577,094 
 
 Grand total 4,209,801 
 
 % of total 
 
 13.2 
 28.1 
 
 .0 
 6.2 
 
 .2 
 
 47.7 
 37.0 
 
 14.8 
 .5 
 
 15.3 
 
 100.0 
 
 38.1 
 .0 
 
 27.1 
 
 1.5 
 
 .0 
 
 66.8 
 30.9 
 
 2.3 
 .0 
 
 2.3 
 
 100.0 
 
 16.4 
 
 24.6 
 
 3.4 
 
 5.7 
 
 .1 
 
 50.1 
 36.2 
 
 13.3 
 .5 
 
 13.7 
 
 100.0 
 
30 
 
 Table 38.-Cost information relative to electrical accidents in underground coal mines, 1983 
 
 Cost to- Element sum 
 
 FATALITIES (4) 
 Industry: 
 
 State Worker Compensation benefits $584,562 
 
 Postaccident production loss 2,823,489 
 
 Primary medical treatment 
 
 Union death or disability benefits 215,000 
 
 Fatal accident investigation 5,700 
 
 Total 3,628,751 
 
 Family: Loss of wages 1 ,052,688 
 
 Public sector: 
 
 Federal Social Security benefits 1,735,376 
 
 Fatal accident investigation 20,585 
 
 Total 1,755,961 
 
 Grand total 6,437,400 
 
 NONFATAL ACCIDENTS (120) 
 
 Industry: 
 
 State Worker Compensation benefits $132,415 
 
 Postaccident production loss 
 
 Primary medical treatment 104,730 
 
 Union death or disability benefits 3,373 
 
 Fatal accident investigation 
 
 Total 240,518 
 
 Family: Loss of wages 99,91 1 
 
 Public sector: 
 
 Federal Social Security benefits 22,162 
 
 Fatal accident investigation 
 
 Total 22,162 
 
 Grand total 362,591 
 
 COMBINED FATAL AND NONFATAL ACCIDENTS (124) 
 
 Industry: 
 
 State Worker Compensation benefits $716,977 
 
 Postaccident production loss 2,823,489 
 
 Primary medical treatment 104,730 
 
 Union death or disability benefits 218,373 
 
 Fatal accident investigation 5,700 
 
 Total 3,869,269 
 
 Family: Loss of wages 1,152,599 
 
 Public sector: 
 
 Federal Social Security benefits 1 ,757,538 
 
 Fatal accident investigation 20,585 
 
 Total 1 ,778,123 
 
 Grand total 6,799,991 
 
 % of total 
 
 9.0 
 43.9 
 
 .0 
 3.3 
 
 .1 
 
 56.3 
 16.4 
 
 27.0 
 .3 
 
 27.3 
 
 100.0 
 
 36.5 
 .0 
 
 28.9 
 .9 
 .0 
 
 66.3 
 27.6 
 
 6.1 
 .0 
 
 6.1 
 
 100.0 
 
 56.9 
 
 41.5 
 
 1.5 
 
 3.2 
 
 .1 
 
 56.9 
 17.0 
 
 25.8 
 .3 
 
 26.1 
 
 100.0 
 
31 
 
 Table 39.-Cost information relative to electrical accidents in underground coal mines, 1984 
 
 Cost to- Element sum 
 
 FATALITIES (3) 
 
 Industry: 
 
 State Worker Compensation benefits $346,684 
 
 Postaccident production loss 696,053 
 
 Primary medical treatment 
 
 Union death or disability benefits 161,250 
 
 Fatal accident investigation 4,188 
 
 Total 1,208,175 
 
 Family: Loss of wages 1,161,305 
 
 Public sector: 
 
 Federal Social Security benefits 1 ,340,422 
 
 Fatal accident investigation 13,990 
 
 Total 1,354,412 
 
 Grand total 3,723,892 
 
 NONFATAL ACCIDENTS (122) 
 
 Industry: 
 
 State Worker Compensation benefits $302,269 
 
 Postaccident production loss 
 
 Primary medical treatment 77,907 
 
 Union death or disability benefits 2,441 
 
 Fatal accident investigation 
 
 Total 382,617 
 
 Family: Loss of wages 197,953 
 
 Public sector: 
 
 Federal Social Security benefits 36,061 
 
 Fatal accident investigation 
 
 Total 36,061 
 
 Grand total 616,631 
 
 COMBINED FATAL AND NONFATAL ACCIDENTS (125) 
 
 Industry: 
 
 State Worker Compensation benefits $648,953 
 
 Postaccident production loss 696,053 
 
 Primary medical treatment 77,907 
 
 Union death or disability benefits 163,691 
 
 Fatal accident investigation 4,188 
 
 Total 1 ,590,792 
 
 Family: Loss of wages 1,359,258 
 
 Public sector: 
 
 Federal Social Security benefits 1 ,376,483 
 
 Fatal accident investigation 13,990 
 
 Total 1,390,473 
 
 Grand total 4,340,523 
 
 % of total 
 
 9.3 
 18.7 
 
 .0 
 4.3 
 
 .1 
 
 32.4 
 31.2 
 
 36.0 
 .4 
 
 36.4 
 
 100.0 
 
 49.1 
 .0 
 
 12.6 
 .4 
 .0 
 
 62.1 
 32.1 
 
 5.8 
 .0 
 
 5.8 
 
 100.0 
 
 15.0 
 
 16.0 
 
 1.8 
 
 3.8 
 
 .1 
 
 36.6 
 31.3 
 
 31.7 
 .3 
 
 32.0 
 
 100.0 
 
32 
 
 Table 40.-Cost information relative to electrical accidents in underground coal mines, 1985 
 
 Cost to- Element sum 
 
 FATALITIES (3) 
 Industry: 
 
 State Worker Compensation benefits $412,273 
 
 Postaccident production loss 400,683 
 
 Primary medical treatment 
 
 Union death or disability benefits 193,500 
 
 Fatal accident investigation 5,154 
 
 Total 1,011,610 
 
 Family: Loss of wages 1,122,732 
 
 Public sector: 
 
 Federal Social Security benefits 766,558 
 
 Fatal accident investigation 19,287 
 
 Total 785,845 
 
 Grand total 2,920,187 
 
 NONFATAL ACCIDENTS (118) 
 
 Industry: 
 
 State Worker Compensation benefits $127,450 
 
 Postaccident production loss 
 
 Primary medical treatment 90,476 
 
 Union death or disability benefits 4,198 
 
 Fatal accident investigation 
 
 Total 222,124 
 
 Family: Loss of wages 91,066 
 
 Public sector: 
 
 Federal Social Security benefits 10,452 
 
 Fatal accident investigation 
 
 Total 10,452 
 
 Grand total 323,642 
 
 COMBINED FATAL AND NONFATAL ACCIDENTS (121) 
 
 Industry: 
 
 State Worker Compensation benefits $539,723 
 
 Postaccident production loss 400,683 
 
 Primary medical treatment 90,476 
 
 Union death or disability benefits 197,698 
 
 Fatal accident investigation 5,154 
 
 Total 1,233,734 
 
 Family: Loss of wages 1,213,798 
 
 Public sector: 
 
 Federal Social Security benefits 777,010 
 
 Fatal accident investigation 19,287 
 
 Total 796,297 
 
 Grand total 3,243,829 
 
 % of total 
 
 14.2 
 13.7 
 
 .0 
 6.6 
 
 .2 
 
 34.7 
 38.4 
 
 26.3 
 .7 
 
 26.9 
 
 100.0 
 
 39.4 
 .0 
 
 28.0 
 
 1.3 
 
 .0 
 
 68.6 
 28.1 
 
 3.2 
 
 .0 
 
 3.2 
 
 100.0 
 
 16.6 
 
 12.4 
 
 2.8 
 
 6.1 
 
 .2 
 
 38.0 
 37.4 
 
 24.0 
 .6 
 
 24.5 
 
 100.0 
 
 Table 41 .-Cost information relative to electrical accidents 1 at the surface at underground coal mines, 1980 
 
 Cost to- Element sum 
 
 Industry: 
 
 State Worker Compensation benefits $19,196 
 
 Postaccident production loss 
 
 Primary medical treatment 20,873 
 
 Union death or disability benefits 721 
 
 Fatal accident investigation 
 
 Total 40,790 
 
 Family: Loss of wages 21,929 
 
 Public sector: 
 
 Federal Social Security benefits 
 
 Fatal accident investigation 
 
 Total 
 
 Grand total 62,719 ~ 
 
 ! 31 nonfatal accidents; no fatal accidents. 
 
 % of total 
 
 30.6 
 .0 
 
 33.3 
 
 1.1 
 
 .0 
 
 65.0 
 35.0 
 
 .0 
 .0 
 
 .0 
 
 100.0 
 
33 
 
 Table 42.-Cost information relative to electrical accidents at the surface at underground coal mines, 1981 
 
 Cost to- Element sum 
 
 FATALITIES (1) 
 Industry: 
 
 State Worker Compensation benefits $149,088 
 
 Postaccident production loss 
 
 Primary medical treatment 
 
 Union death or disability benefits 53,750 
 
 Fatal accident investigation 2,101 
 
 Total 204,939 
 
 Family: Loss of wages 161,495 
 
 Public sector: 
 
 Federal Social Security benefits 363,297 
 
 Fatal accident investigation 5,153 
 
 Total 368,450 
 
 Grand total 734,884 
 
 NONFATAL ACCIDENTS (27) 
 
 Industry: 
 
 State Worker Compensation benefits 19,197 
 
 Postaccident production loss 
 
 Primary medical treatment 9,056 
 
 Union death or disability benefits 584 
 
 Fatal accident investigation 
 
 Total 28,837 
 
 Family: Loss of wages 17,674 
 
 Public sector: 
 
 Federal Social Security benefits 
 
 Fatal accident investigation 
 
 Total 6 
 
 Grand total 46,511 
 
 COMBINED FATAL AND NONFATAL ACCIDENTS (28) 
 
 Industry: 
 
 State Worker Compensation benefits 168,285 
 
 Postaccident production loss 
 
 Primary medical treatment 9,056 
 
 Union death or disability benefits 54,344 
 
 Fatal accident investigation 2,101 
 
 Total 233,776 
 
 Family: Loss of wages 179,169 
 
 Public sector: 
 
 Federal Social Security benefits 363,297 
 
 Fatal accident investigation 5,153 
 
 Total 368,450 
 
 Grand total 781,395 
 
 % of total 
 
 20.3 
 
 .0 
 
 .0 
 
 7.3 
 
 .3 
 
 27.9 
 22.0 
 
 49.4 
 .7 
 
 50.1 
 
 100.0 
 
 62.0 
 .0 
 
 19.5 
 
 1.3 
 
 .0 
 
 62.0 
 38.0 
 
 .0 
 .0 
 
 100.0 
 
 21.5 
 
 .0 
 
 1.2 
 
 7.0 
 
 .3 
 
 29.9 
 22.9 
 
 46.5 
 .7 
 
 47.2 
 
 100.0 
 
34 
 
 Table 43.-Cost information relative to electrical accidents at the surface at underground coal mines, 1982 
 
 Cost to- Element sum 
 
 FATALITIES (2) 
 
 Industry: 
 
 State Worker Compensation benefits $265,295 
 
 Postaccident production loss 
 
 Primary medical treatment 
 
 Union death or disability benefits 107,500 
 
 Fatal accident investigation 3,598 
 
 Total 376,393 
 
 Family: Loss of wages 256,591 
 
 Public sector: 
 
 Federal Social Security benefits 620,009 
 
 Fatal accident investigation 10,936 
 
 Total 630,945 ~ 
 
 Grand total 1 ,263,929 
 
 NONFATAL ACCIDENTS (20) 
 
 Industry: 
 
 State Worker Compensation benefits 12,013 
 
 Postaccident production loss 
 
 Primary medical treatment 6,286 
 
 Union death or disability benefits 632 
 
 Fatal accident investigation 
 
 Total 181)31 
 
 Family: Loss of wages 11 ,678 
 
 Public sector: 
 
 Federal Social Security benefits 
 
 Fatal accident investigation 
 
 Total 
 
 Grand total 30,609 
 
 COMBINED FATAL AND NONFATAL ACCIDENTS (22) 
 
 Industry: 
 
 State Worker Compensation benefits 277,308 
 
 Postaccident production loss 
 
 Primary medical treatment 6,286 
 
 Union death or disability benefits 108,132 
 
 Fatal accident investigation 3,598 
 
 Total 395,324 
 
 Family: Loss of wages 268,269 
 
 Public sector: 
 
 Federal Social Security benefits 620,009 
 
 Fatal accident investigation 10,936 
 
 Total 630,945 
 
 Grand total 1,294,538 
 
 % of total 
 
 21.0 
 
 .0 
 
 .0 
 
 8.5 
 
 .3 
 
 29.8 
 20.3 
 
 49.1 
 .8 
 
 49.9 
 
 100.0 
 
 39.2 
 .0 
 
 20.5 
 
 2.1 
 
 .0 
 
 61.8 
 38.2 
 
 .0 
 .0 
 
 .0 
 
 100.0 
 
 21.4 
 
 .0 
 
 .5 
 
 8.4 
 
 .3 
 
 30.6 
 20.7 
 
 47.9 
 .8 
 
 48.7 
 
 100.0 
 
35 
 
 Table 44.-Cost information relative to electrical accidents at the surface at underground coal mines, 1983 
 
 Cost to- Element sum 
 
 FATALITIES (2) 
 Industry: 
 
 State Worker Compensation benefits $236,712 
 
 Postaccident production loss 
 
 Primary medical treatment 
 
 Union death or disability benefits 107,500 
 
 Fatal accident investigation 2,439 
 
 Total 346,651 
 
 Family: Loss of wages 1,016,102 
 
 Public sector: 
 
 Federal Social Security benefits 217,679 
 
 Fatal accident investigation 8,083 
 
 Total 225,762 
 
 Grand total 1,588,515 
 
 NONFATAL ACCIDENTS (13) 
 
 Industry: 
 
 State Worker Compensation benefits 10,283 
 
 Postaccident production loss 
 
 Primary medical treatment 2,474 
 
 Union death or disability benefits 354 
 
 Fatal accident investigation 
 
 Total 13,111 
 
 Family: Loss of wages 9,592 
 
 Public sector: 
 
 Federal Social Security benefits 
 
 Fatal accident investigation 
 
 Total 6 
 
 Grand total 22,703 
 
 COMBINED FATAL AND NONFATAL ACCIDENTS (15) 
 
 Industry: 
 
 State Worker Compensation benefits 246,995 
 
 Postaccident production loss 
 
 Primary medical treatment 2,474 
 
 Union death or disability benefits 107,854 
 
 Fatal accident investigation 2,439 
 
 Total 359,762 
 
 Family: Loss of wages 1,025,694 
 
 Public sector: 
 
 Federal Social Security benefits 217,679 
 
 Fatal accident investigation 8,083 
 
 Total 225,762 
 
 Grand total 1,611,218 
 
 % of total 
 
 14.9 
 
 .0 
 
 .0 
 
 6.8 
 
 .2 
 
 21.8 
 64.0 
 
 13.7 
 .5 
 
 14.2 
 
 100.0 
 
 45.3 
 .0 
 
 10.9 
 
 1.6 
 
 .0 
 
 57.8 
 42.2 
 
 .0 
 .0 
 
 100.0 
 
 15.3 
 
 .0 
 
 .2 
 
 6.7 
 
 .2 
 
 22.3 
 63.7 
 
 13.5 
 .5 
 
 14.0 
 
 100.0 
 
36 
 
 Table 45.-Cost information relative to electrical accidents at the surface at underground coal mines, 1984 
 
 Cost to- Element sum 
 
 FATALITIES (1) 
 
 Industry: 
 
 State Worker Compensation benefits $151,342 
 
 Postaccident production loss 
 
 Primary medical treatment 
 
 Union death or disability benefits 53,750 
 
 Fatal accident investigation 2,158 
 
 Total 207,250 
 
 Family: Loss of wages 384,618 
 
 Public sector: 
 
 Federal Social Security benefits 194,568 
 
 Fatal accident investigation 7,750 
 
 Total 202,318 
 
 Grand total 794,186 
 
 NONFATAL ACCIDENTS (18) 
 
 Industry: 
 
 State Worker Compensation benefits 35,835 
 
 Postaccident production loss 
 
 Primary medical treatment 9,768 
 
 Union death or disability benefits 921 
 
 Fatal accident investigation 
 
 Total 46,524 
 
 Family: Loss of wages 19,602 
 
 Public sector: 
 
 Federal Social Security benefits 12,187 
 
 Fatal accident investigation 
 
 Total 12,187 
 
 Grand total 78,313 
 
 COMBINED FATAL AND NONFATAL ACCIDENTS (19) 
 
 Industry: 
 
 State Worker Compensation benefits 187,177 
 
 Postaccident production loss 
 
 Primary medical treatment 9,768 
 
 Union death or disability benefits 54,671 
 
 Fatal accident investigation 2,158 
 
 Total 253,774 
 
 Family: Loss of wages 404,220 
 
 Public sector: 
 
 Federal Social Security benefits 206,755 
 
 Fatal accident investigation 7,750 
 
 Total 214,505 
 
 Grand total 872,499 
 
 % of total 
 
 19.1 
 
 .0 
 
 .0 
 
 6.8 
 
 .3 
 
 26.1 
 48.4 
 
 24.5 
 1.0 
 
 25.5 
 
 100.0 
 
 45.8 
 .0 
 
 12.5 
 
 1.2 
 
 .0 
 
 59.4 
 25.0 
 
 15.6 
 .0 
 
 15.6 
 
 100.0 
 
 21.5 
 
 .0 
 
 1.1 
 
 6.3 
 
 .2 
 
 29.1 
 46.3 
 
 23.7 
 .9 
 
 24.6 
 
 100.0 
 
37 
 
 Table 46.-Cost information relative to electrical accidents at the surface at underground coal mines, 1985 
 
 Cost to- Element sum 
 
 FATALITIES (2) 
 Industry: 
 
 State Worker Compensation benefits $255,289 
 
 Postaccident production loss 
 
 Primary medical treatment 
 
 Union death or disability benefits 129,000 
 
 Fatal accident investigation 2,906 
 
 Total 387,195 
 
 Family: Loss of wages 1,219,632 
 
 Public sector: 
 
 Federal Social Security benefits 143,343 
 
 Fatal accident investigation 11,178 
 
 Total 154,521 
 
 Grand total 1,761,348 
 
 NONFATAL ACCIDENTS (16) 
 
 Industry: 
 
 State Worker Compensation benefits 100,649 
 
 Postaccident production loss 
 
 Primary medical treatment 14,210 
 
 Union death or disability benefits 210 
 
 Fatal accident investigation 
 
 Total 115,069 
 
 Family: Loss of wages 71,662 
 
 Public sector: 
 
 Federal Social Security benefits 
 
 Fatal accident investigation 
 
 Total 
 
 Grand total 186,731 
 
 COMBINED FATAL AND NONFATAL ACCIDENTS (18) 
 
 Industry: 
 
 State Worker Compensation benefits 355,938 
 
 Postaccident production loss 
 
 Primary medical treatment 14,210 
 
 Union death or disability benefits 129,210 
 
 Fatal accident investigation 2,906 
 
 Total 502,365 
 
 Family: Loss of wages 1 ,291 ,294 
 
 Public sector: 
 
 Federal Social Security benefits 143,343 
 
 Fatal accident investigation 11,178 
 
 Total 154,521 
 
 Grand total 1,948,079 
 
 % of total 
 
 14.5 
 
 .0 
 
 .0 
 
 7.3 
 
 .2 
 
 22.0 
 69.2 
 
 8.2 
 .6 
 
 8.8 
 
 100.0 
 
 53.9 
 
 .0 
 
 7.6 
 
 .1 
 
 .0 
 
 61.6 
 38.4 
 
 .0 
 .0 
 
 100.0 
 
 18.3 
 
 .0 
 
 .7 
 
 6.6 
 
 .1 
 
 25.8 
 66.3 
 
 7.4 
 .6 
 
 7.9 
 
 100.0 
 
 Table 47.-Cost information relative to electrical accidents 1 in underground metal-nonmetal mines, 1980 
 
 Cost to- Element sum 
 Industry: 
 
 State Worker Compensation benefits $7,624 
 
 Postaccident production loss 
 
 Primary medical treatment 31,851 
 
 Union death or disability benefits 632 
 
 Fatal accident investigation 
 
 Total 40,107 
 
 Family: Loss of wages 11 ,586 
 
 Public sector: 
 
 Federal Social Security benefits 
 
 Fatal accident investigation 
 
 Total 
 
 Grand total 51 ,693 
 
 '26 nonfatal accidents; no fatal accidents. 
 
 % of total 
 
 30.6 
 .0 
 
 61.6 
 
 1.2 
 
 .0 
 
 77.6 
 22.4 
 
 .0 
 .0 
 
 100.0 
 
38 
 
 Table 48.-Cost information relative to electrical accidents in underground metal-nonmetal mines, 1981 
 
 Cost to- Element sum 
 
 FATALITIES (1) 
 
 Industry: 
 
 State Worker Compensation benefits $0 
 
 Postaccident production loss 
 
 Primary medical treatment 
 
 Union death or disability benefits 53,750 
 
 Fatal accident investigation 1,881 
 
 Total 55,631 
 
 Family: Loss of wages 690,152 
 
 Public sector: 
 
 Federal Social Security benefits 
 
 Fatal accident investigation 5,744 
 
 Total 5,744 
 
 Grand total 751 ,527 
 
 NONFATAL ACCIDENTS (31) 
 
 Industry: 
 
 State Worker Compensation benefits 23,359 
 
 Postaccident production loss 
 
 Primary medical treatment 7,258 
 
 Union death or disability benefits 708 
 
 Fatal accident investigation 
 
 Total 31,325 
 
 Family: Loss of wages 23,152 
 
 Public sector: 
 
 Federal Social Security benefits 
 
 Fatal accident investigation 
 
 Total 
 
 Grand total 54,477 
 
 COMBINED FATAL AND NONFATAL ACCIDENTS (32) 
 
 Industry: 
 
 State Worker Compensation benefits 23,359 
 
 Postaccident production loss 
 
 Primary medical treatment 7,258 
 
 Union death or disability benefits 54,458 
 
 Fatal accident investigation 1,881 
 
 Total 86,956 
 
 Family: Loss of wages 713,304 
 
 Public sector: 
 
 Federal Social Security benefits 
 
 Fatal accident investigation 5,744 
 
 Total 5,744 
 
 Grand total 806,004 
 
 % of total 
 
 .0 
 .0 
 .0 
 7.2 
 .2 
 
 7.4 
 91.8 
 
 .0 
 .8 
 
 0.8 
 
 100.0 
 
 57.5 
 .0 
 
 13.3 
 
 1.3 
 
 .0 
 
 57.5 
 42.5 
 
 .0 
 .0 
 
 .0 
 
 100.0 
 
 2.9 
 .0 
 .9 
 
 6.8 
 .2 
 
 10.8 
 88.5 
 
 .0 
 .7 
 
 7.9 
 
 100.0 
 
 Table 49.-Cost information relative to electrical accidents 1 in underground metal-nonmetal mines, 1982 
 
 Cost to- Element sum 
 Industry: 
 
 State Worker Compensation benefits $13,001 
 
 Postaccident production loss 
 
 Primary medical treatment 8,857 
 
 Union death or disability benefits 38 
 
 Fatal accident investigation 
 
 Total 21,896 
 
 Family: Loss of wages 13,077 
 
 Public sector: 
 
 Federal Social Security benefits 
 
 Fatal accident investigation 
 
 Total 
 
 Grand total 34,973 
 
 11 nonfatal accidents; no fatal accidents. 
 
 % of total 
 
 37.2 
 .0 
 
 25.3 
 .1 
 .0 
 
 62.6 
 37.4 
 
 .0 
 .0 
 
 100.0 
 
39 
 
 Table 50.-Cost information relative to electrical accidents in underground metal-nonmetal mines, 1983 
 
 Cost to- Element sum 
 
 FATALITIES (1) 
 Industry: 
 
 State Worker Compensation benefits $89,333 
 
 Postaccident production loss 
 
 Primary medical treatment 
 
 Union death or disability benefits 53,750 
 
 Fatal accident investigation 1,130 
 
 Total 144,213 
 
 Family: Loss of wages 304,573 
 
 Public sector: 
 
 Federal Social Security benefits 398,346 
 
 Fatal accident investigation 4,161 
 
 Total 402,507 
 
 Grand total 851,293 
 
 NONFATAL ACCIDENTS (7) 
 
 Industry: 
 
 State Worker Compensation benefits 1,181 
 
 Postaccident production loss 
 
 Primary medical treatment 9,008 
 
 Union death or disability benefits 460 
 
 Fatal accident investigation (5 
 
 Total 10,649 
 
 Family: Loss of wages 3,288 
 
 Public sector: 
 
 Federal Social Security benefits 
 
 Fatal accident investigation 
 
 Total 6 
 
 Grand total 13,937 
 
 COMBINED FATAL AND NONFATAL ACCIDENTS (8) 
 
 Industry: 
 
 State Worker Compensation benefits 90,514 
 
 Postaccident production loss 
 
 Primary medical treatment 9,008 
 
 Union death or disability benefits 54,210 
 
 Fatal accident investigation 1,130 
 
 Total 154,862 
 
 Family: Loss of wages 307,861 
 
 Public sector: 
 
 Federal Social Security benefits 398,346 
 
 Fatal accident investigation 4,161 
 
 Total 402,507 
 
 Grand total 865,230 
 
 % of total 
 
 10.5 
 
 .0 
 
 .0 
 
 6.3 
 
 .1 
 
 16.9 
 35.8 
 
 46.8 
 .5 
 
 47.3 
 
 100.0 
 
 8.5 
 
 .0 
 
 64.6 
 
 3.3 
 .0 
 
 76.4 
 23.6 
 
 .0 
 .0 
 
 100.0 
 
 10.5 
 
 .0 
 
 1.0 
 
 6.3 
 
 .1 
 
 17.9 
 35.6 
 
 46.0 
 .5 
 
 46.5 
 
 100.0 
 
40 
 
 Table 51 .-Cost information relative to electrical accidents 1 in underground metal-nonmetal mines, 1 984 
 
 Cost to- Element sum 
 
 Industry: 
 
 State Worker Compensation benefits $3,920 
 
 Postaccident production loss 
 
 Primary medical treatment 4,095 
 
 Union death or disability benefits 248 
 
 Fatal accident investigation 
 
 Total 8,263 
 
 Family: Loss of wages 3,598 
 
 Public sector: 
 
 Federal Social Security benefits 
 
 Fatal accident investigation CD 
 
 Total 
 
 Grand total 11,861 
 
 : 11 nonfatal accidents; no fatal accidents. 
 
 % of total 
 
 33.0 
 .0 
 
 34.5 
 
 2.1 
 
 .0 
 
 69.7 
 30.3 
 
 .0 
 .0 
 
 .0 
 
 100.0 
 
 Table 52.-Cost information relative to electrical accidents 1 in underground metal-nonmetal mines, 1 985 
 
 Cost to- Element sum 
 
 Industry: 
 
 State Worker Compensation benefits $18,145 
 
 Postaccident production loss 
 
 Primary medical treatment 6,938 
 
 Union death or disability benefits 42 
 
 Fatal accident investigation 
 
 Total 25,125 
 
 Family: Loss of wages 9,231 
 
 Public sector: 
 
 Federal Social Security benefits 
 
 Fatal accident investigation 
 
 Total 
 
 Grand total 34,356 ~ 
 
 l 5 nonfatal accidents; no fatal accidents. 
 
 % of total 
 
 52.8 
 .0 
 
 20.2 
 .1 
 .0 
 
 73.1 
 26.9 
 
 .0 
 .0 
 
 .0 
 
 100.0 
 
 Table 53.-Cost information relative to electrical accidents 1 at the surface at underground metal-nonmetal mines, 1 980 
 
 Cost to- Element sum % of total 
 
 Industry: 
 
 State Worker Compensation benefits $36,428 64.1 
 
 Postaccident production loss .0 
 
 Primary medical treatment 10,142 17.9 
 
 Union death or disability benefits 150 .3 
 
 Fatal accident investigation (3 .0 
 
 Total 46,720 82.3 
 
 Family: Loss of wages 10,069 17.7 
 
 Public sector: 
 
 Federal Social Security benefits .0 
 
 Fatal accident investigation .0 
 
 Total .0 
 
 Grand total 56,789 100.0 ~ 
 
 1 13 nonfatal accidents; no fatal accidents. 
 
41 
 
 Table 54.-Cost information relative to electrical accidents 1 at the surface at underground metal-nonmetal mines, 1981 
 
 Cost to- Element sum % of total 
 Industry: 
 
 State Worker Compensation benefits $20,207 54.0 
 
 Postaccident production loss .0 
 
 Primary medical treatment 1,643 4.4 
 
 Union death or disability benefits 319 .9 
 
 Fatal accident investigation .0 
 
 Total 22,169 59.3 
 
 Family: Loss of wages 15,240 40.7 
 
 Public sector: 
 
 Federal Social Security benefits .0 
 
 Fatal accident investigation .0 
 
 Total .0 
 
 Grand total 37,409 100.0~ 
 
 *9 nonfatal accidents; no fatal accidents. 
 
 Table 55-Cost information relative to electrical accidents at the surface at underground metal-nonmetal mines, 1982 
 
 Cost to- Element sum % of total 
 
 FATALITIES (1) 
 
 Industry: 
 
 State Worker Compensation benefits $75,146 8.5 
 
 Postaccident production loss .0 
 
 Primary medical treatment .0 
 
 Union death or disability benefits 53,750 6.1 
 
 Fatal accident investigation 1,609 .2 
 
 Total 130,505 t4l3 
 
 Family: Loss of wages 745,075 84.7 
 
 Public sector: 
 
 Federal Social Security benefits .0 
 
 Fatal accident investigation 3,864 .4 
 
 Total 3,864 A 
 
 Grand total 879,444 100.0~ 
 
 NONFATAL ACCIDENTS (7) 
 
 Industry: 
 
 State Worker Compensation benefits 14,973 55.9 
 
 Postaccident production loss .0 
 
 Primary medical treatment 2,200 8.2 
 
 Union death or disability benefits 226 .8 
 
 Fatal accident investigation .0 
 
 Total 17,399 64.9 
 
 Family: Loss of wages 9,422 35.1 
 
 Public sector: 
 
 Federal Social Security benefits .0 
 
 Fatal accident investigation .0 
 
 Total .0 
 
 Grand total 26,821 100.0 
 
 COMBINED FATAL AND NONFATAL ACCIDENTS (8) 
 
 Industry: 
 
 State Worker Compensation benefits 90,119 9.9 
 
 Postaccident production loss .0 
 
 Primary medical treatment 2,200 .2 
 
 Union death or disability benefits 53,976 6.0 
 
 Fatal accident investigation 1 ,609 .2 
 
 Total 147,904 16\3 
 
 Family: Loss of wages 754,497 83.3 
 
 Public sector: 
 
 Federal Social Security benefits .0 
 
 Fatal accident investigation 3,864 .4 
 
 Total 3,864 A 
 
 Grand total 906,265 100.0 
 
42 
 
 Table 56.-Cost information relative to electrical accidents at the surface at underground metal-nonmetal mines, 1 983 
 
 Cost to- Element sum % of total 
 
 FATALITIES (1) 
 
 Industry: 
 
 State Worker Compensation benefits $112,047 13.1 
 
 Postaccident production loss .0 
 
 Primary medical treatment .0 
 
 Union death or disability benefits 53,750 6.3 
 
 Fatal accident investigation 2,049 .2 
 
 Total 167,846 19.6 
 
 Family: Loss of wages 216,947 25.3 
 
 Public sector: 
 
 Federal Social Security benefits 465,231 54.3 
 
 Fatal accident investigation 6,392 .8 
 
 Total 471 ,623 55.1 
 
 Grand total 856,416 100.0 ~ 
 
 NONFATAL ACCIDENTS (2) 
 
 Industry: 
 
 State Worker Compensation benefits 3,275 23.3 
 
 Postaccident production loss .0 
 
 Primary medical treatment 1 ,067 7.6 
 
 Union death or disability benefits 698 5.0 
 
 Fatal accident investigation .0 
 
 Total 5,040 35.9 
 
 Family: Loss of wages 9,007 64.1 
 
 Public sector: 
 
 Federal Social Security benefits .0 
 
 Fatal accident investigation .0 
 
 Total 6 iO - 
 
 Grand total 14,047 100.0 ~ 
 
 COMBINED FATAL AND NONFATAL ACCIDENTS (3) 
 
 Industry: 
 
 State Worker Compensation benefits 115,322 13.2 
 
 Postaccident production loss .0 
 
 Primary medical treatment 1 ,067 7.6 
 
 Union death or disability benefits 54,448 6.3 
 
 Fatal accident investigation 2,049 .2 
 
 Total 172,886 19.9 
 
 Family: Loss of wages 225,954 26.0 
 
 Public sector: 
 
 Federal Social Security benefits 465,231 53.4 
 
 Fatal accident investigation 6,392 .6 
 
 Total 471,623 54.1 
 
 Grand total 870,463 ~~ 100.0 
 
43 
 
 Table 57.-Cost information relative to electrical accidents at the surface at underground metal-nonmetal mines, 1984 
 
 Cost to- Element sum % of total 
 
 FATALITIES (2) 
 
 Industry: 
 
 State Worker Compensation benefits $162,508 15.5 
 
 Postaccident production loss .0 
 
 Primary medical treatment .0 
 
 Union death or disability benefits 53,750 5.1 
 
 Fatal accident investigation 1,545 .1 
 
 Total 217,803 20.7 
 
 Family: Loss of wages 145,969 13.9 
 
 Public sector: 
 
 Federal Social Security benefits 680,158 64.9 
 
 Fatal accident investigation 3,531 .5 
 
 Total 683,689 65.4 
 
 Grand total 1,047,461 100.0 
 
 NONFATAL ACCIDENTS (2) 
 
 Industry: 
 
 State Worker Compensation benefits 22,721 89.7 
 
 Postaccident production loss .0 
 
 Primary medical treatment 2,063 8.1 
 
 Union death or disability benefits 177 .7 
 
 Fatal accident investigation .0 
 
 Total 24,961 98.5 
 
 Family: Loss of wages 380 1.5 
 
 Public sector: 
 
 Federal Social Security benefits .0 
 
 Fatal accident investigation .0 
 
 Total " 6 !6 
 
 Grand total 25,341 100.0~ 
 
 COMBINED FATAL AND NONFATAL ACCIDENTS (4) 
 
 Industry: 
 
 State Worker Compensation benefits 185,229 17.3 
 
 Postaccident production loss .0 
 
 Primary medical treatment 2,063 .2 
 
 Union death or disability benefits • 53,927 5.0 
 
 Fatal accident investigation 1,545 .2 
 
 Total 242,764 22.7 
 
 Family: Loss of wages 146,349 13.6 
 
 Public sector: 
 
 Federal Social Security benefits 680,158 63.4 
 
 Fatal accident investigation 3,531 .3 
 
 Total 683,689 63.7 
 
 Grand total 1,072,802 100.0 
 
44 
 
 Table 58.-Cost information relative to electrical accidents at the surface at underground metal-nonmetal mines, 1985 
 
 Cost to- Element sum % of total 
 
 FATALITIES (1) 
 
 Industry: 
 
 State Worker Compensation benefits $90,972 56.2 
 
 Postaccident production loss .0 
 
 Primary medical treatment .0 
 
 Union death or disability benefits 64,500 39.9 
 
 Fatal accident investigation 1,241 .8 
 
 Total 156,713 961J 
 
 Family: Loss of wages .0 
 
 Public sector: 
 
 Federal Social Security benefits .0 
 
 Fatal accident investigation 5,065 3.1 
 
 Total 5,065 3U 
 
 Grand total 161,778 100.0 
 
 NONFATAL ACCIDENTS (1) 
 
 Industry: 
 
 State Worker Compensation benefits .0 
 
 Postaccident production loss .0 
 
 Primary medical treatment 398 51.6 
 
 Union death or disability benefits 126 16.3 
 
 Fatal accident investigation .0 
 
 Total 524 68l) 
 
 Family: Loss of wages 247 32.0 
 
 Public sector: 
 
 Federal Social Security benefits .0 
 
 Fatal accident investigation .0 
 
 Total X) 
 
 Grand total 771 100.0 ~ 
 
 COMBINED FATAL AND NONFATAL ACCIDENTS (2) 
 
 Industry: 
 
 State Worker Compensation benefits 90,972 56.0 
 
 Postaccident production loss .0 
 
 Primary medical treatment 398 .2 
 
 Union death or disability benefits 64,626 39.8 
 
 Fatal accident investigation 1,241 .8 
 
 Total 157,237 96.7 
 
 Family: Loss of wages 247 .2 
 
 Public sector: 
 
 Federal Social Security benefits .0 
 
 Fatal accident investigation 5,065 3.1 
 
 Total 5,065 3.1 
 
 Grand total 162,549 100.0 
 
45 
 
 CONCLUSIONS 
 
 The most common activities resulting in an electrical 
 injury in all four mining sectors investigated are electrical 
 repair and maintenance. Electricians and mechanics suf- 
 fered the most injuries with the part of the body most 
 affected being the hand or body systems 3 in the case of 
 nonfatal injuries, and electrocutions being the cause of all 
 fatal injuries. For all four mining sectors combined, the 
 average age of fatal accident victims was 35 and the aver- 
 age age of nonfatal accident victims was 36. 
 
 Of the 1,142 fatal and nonfatal accidents analyzed, 63% 
 of the victims had to 5 years of experience at the specific 
 job they were performing when the accident occurred. 
 One means of reducing electrical accidents may involve 
 more frequent, more extensive training for employees with 
 this level of experience. 
 
 Some safety experts believe that the single most im- 
 portant technique for bringing about safe worker behavior 
 is training. Formal safety training programs play a vital 
 role in many companies in a wide range of U.S. industries. 
 Firms that continue safety efforts in a systematic and thor- 
 ough fashion have been rewarded with substantial reduc- 
 tions in lost hours of work. The money saved usually more 
 than justifies the cost of the safety training programs (3). 
 
 Successful training programs focus on two interrelated 
 phases: (1) knowledge of safe operating procedures and 
 (2) a positive attitude toward safety. Employees may be 
 trained in the proper method of performing electrical 
 repair and maintenance on a piece of equipment; however, 
 if their attitude toward safety is negative, this knowledge 
 may not prevent them from becoming involved in a poten- 
 tially fatal accident. On the other hand, if employees are 
 not properly trained in performing their specific job func- 
 tion, a positive attitude toward safety may still not prevent 
 an accident from occurring. 
 
 Whatever techniques are employed, active management 
 support of safety is a key dimension in the success of any 
 safety program. Unless employees perceive that the orga- 
 nizational climate is highly supportive of safety on the job, 
 the most sophisticated safety program will not be maxi- 
 mally effective. Management at all levels of supervision 
 
 HThe body system classification applies when the function of the 
 entire body has been affected, without specific injury to any other part. 
 It does not apply when the system damage results from an external 
 injury affecting an external part such as a back injury that includes 
 damage to the nerves of the spinal cord. 
 
 must demonstrate that safety is a responsibility that every- 
 one must actively share. Employees should maintain a 
 continuing interest and constant awareness of the impor- 
 tance of following safe working practices. 
 
 Some guidelines and recommendations that have been 
 suggested from various sources as possible means of re- 
 ducing electrical fatalities include the following: 
 
 1. Frequent electrical safety presentations explaining 
 the hazards of working on energized equipment (4). 
 
 2. Annual refresher training (4). 
 
 3. Warning posters and stickers relating to specific 
 problems (4). 
 
 4. Implementation of a program to ensure that only 
 well-trained and knowledgeable personnel involved in 
 electrical repair and maintenance are performing electrical 
 work (4). 
 
 5. Close inspection of trailing cables at the beginning 
 of each shift (5). 
 
 6. Use of cable handling devices and protective gloves 
 when appropriate (5). 
 
 7. Use of shielded low- voltage trailing cables to prevent 
 shock exposure when handling trailing cables and splices 
 by confining the shock hazard within the cable jacket (5). 
 
 8. Use of ground-fault circuit interrupters that will shut 
 off the current before a serious shock occurs (6). 
 
 9. Use of the most appropriate tool for the job being 
 performed (6). 
 
 10. Provision of adequate clearance in the working 
 quarters to prevent worker fatigue (<5). 
 
 11. Use of portable, stepdown transformers in certain 
 locations so that a low voltage (6, 12, 24, or 32 volts) 
 electrical system may be installed (<5). 
 
 12. Use of insulating platforms, rubber mats, and 
 rubber gloves when tools are being used in wet locations 
 (6). 
 
 13. Proper use of double-insulated tools and three-wire 
 tools (6). 
 
 14. Regular tool inspection (<5). 
 
 15. Clean power tools regularly (6). 
 
 16. Eliminate overhead lines (7). 
 
 17. Limit access or raise overhead lines (7). 
 
 18. Provide cardiopulmonary resuscitation (CPR) 
 training (7). 
 
 19. Insist on adherence to safe working procedures by 
 first-line supervisors (3). 
 
46 
 
 REFERENCES 
 
 1. Di Canio, D. G. Analysis of Economic Impact of Fatal/Nonfatal 
 Accidents in Surface Coal and Metal/Nonmetal Mines (contract 
 J01 13005, SRI Int.). BuMines OFR 206-84, 1983, 145 pp.; NTIS PB 85- 
 145787. 
 
 2. . Accident Cost Indicator Model Reference and User 
 
 Manual (contract J01 13005, SRI Int.). BuMines OFR 207-84, 1983, 
 148 pp.; NTIS PB 85-145795. 
 
 3. Cohen, A., M. J. Smith, and W. K. Anger. Self-Protective 
 Measures Against Workplace Hazards. J. Saf. Res., v. 11, 1979, pp. 121- 
 131. 
 
 4. Hall, P. M. An Electrical Fatality Prevention Program for the 
 Coal Mining Industry. Paper in Proceedings of The Seventh WVU 
 
 Mining Electrotechnology Conference, West Virginia University, July 24- 
 27, 1984, pp. 231-243. 
 
 5. Reynolds, R. L. History of Coal Mine Electrical Fatalities Since 
 1970. Paper in Proceedings of The Seventh WVU Mining 
 Electrotechnology Conference, West Virginia University, July 24-27, 
 1984, pp. 213-230. 
 
 6. Lahey, J. Electrically Safe Tools, Choosing and Using Them. 
 Natl. Saf. News, July 1980, pp. 45^6. 
 
 7. Yenchek, M. R. The Bureau of Mines Shock Prevention 
 Research Program, An Overview. Paper in Proceedings of The Seventh 
 WVU Mining Electrotechnology Conference, West Virginia University, 
 July 24-27, 1984, pp. 244-256. 
 
 BIBLIOGRAPHY 
 
 Bowers, E. T. Using ADA (Accident Data Analysis) in Mine Safety 
 Research. BuMines OFR 72-86, 1986, 111 pp. 
 
 Schultz, D. P., and S. E. Schultz. Psychology and Industry Today. 
 Macmillan, 4th ed., 1986, pp. 462^64. 
 
 Zohar, D. Safety Climate in Industrial Organizations: Theoretical 
 and Applied Implications. J. Appl. Psychol., No. 65, 1980, pp. 96-102. 
 
47 
 
 APPENDIX A.-DESCRIPTION OF INFORMATION CATEGORIES AND DEFINITION 
 OF NONFATAL ACCIDENTS AS USED IN THIS REPORT 
 
 INFORMATION CATEGORIES 
 
 Category 
 
 Activity engaged in when 
 accident occurred. 
 
 Source of injury 
 
 Job title 
 
 Mining method 
 
 Location 
 
 Machine 
 
 Nature of injury 
 
 Accident type 
 
 Part of body 
 
 Description 
 
 Specific activity at time of injury. 
 
 The item that directly inflicted injury. 
 
 The individual's occupation. 
 
 The mining method being used. 
 
 The specific location of accident. 
 
 The machine (equipment), if listed, involved 
 
 in accident. 
 The injury in terms of its principle 
 
 physical characteristics. 
 The event that resulted in injury. 
 Identifies part of body injured in accident. 
 
 NONFATAL ACCIDENTS 
 
 Nonfatal accidents, as defined in this report, include accidents resulting in the following: 
 
 Permanent total or permanent partial disability. 
 
 Days away from work only. 
 
 Days away from work and days of restricted activity. 
 
 Days of restricted work activity only. 
 
 Injuries that do not result in death, nor days away from work, nor days of restricted work activity. 
 
48 
 
 APPENDIX B.-VISUAL REPRESENTATIONS OF INFORMATION 
 
 The following figures present data contained in the 
 tables in the main text concerning fatal and nonfatal elec- 
 trical accidents in mining for the 1980-85 period. For 
 those information categories with extensive detail only data 
 for the first 10 entries are included. The following is a 
 breakdown of the information presented in the figures. 
 
 Figure B-l (table 2) .-Fatal electrical accidents in un- 
 derground coal mines, by activity engaged in when accident 
 occurred, by source of injury, by job title, by mining meth- 
 od, by location, and by machine. 
 
 Figure B-2 (table 6) -Nonfatal electrical accidents in 
 underground coal mines, by activity engaged in when acci- 
 dent occurred, by source of injury, by job title, by mining 
 method, by location, by nature of injury, by accident type, 
 and by part of body. 
 
 Figure B-3 (table ll).-Fatal electrical accidents at the 
 surface at underground coal mines, by activity engaged in 
 
 when fatality occurred, by source of injury, by job title, and 
 by machine. 
 
 Figure B-4 (table 15) -Nonfatal electrical accidents at 
 the surface at underground coal mines, by activity engaged 
 in when accident occurred, by source of injury, by job title, 
 by machine, by nature of injury, by accident type, and by 
 part of body. 
 
 Figure B-5 (table 22) -Nonfatal electrical accidents in 
 underground metal-nonmetal mines, by activity engaged in 
 when accident occurred, by source of injury, by job title, by 
 machine, by nature of injury, by part of body, by source of 
 injury, and by job title. 
 
 Figure B-6 (table 31). -Nonfatal electrical accidents at 
 the surface at underground metal-nonmetal mines, by 
 activity engaged in when accident occurred, by source of 
 injury, by job title, by machine, by nature of injury, by 
 accident type, and by part of body. 
 
49 
 
 20" 
 18" 
 16-- 
 14" 
 
 Ld 
 
 Q 12+ 
 
 
 o 
 a: 
 
 Ld 
 
 10- 
 
 8- 
 
 6- 
 
 4" 
 
 2-- 
 
 13 
 
 2 2 
 
 1111111 
 
 KEY 
 
 I I Maintain, repair 
 
 electrical equipment 
 
 ' ] Handle supplies, material 
 Y////\ Moue power cable 
 ^\>c\\] Rerail equipment 
 I | Inspect machinery 
 &%£/$[ Drill face, rib, side 
 Ualk, run 
 
 I I I I II Bolt roof 
 
 | Operate rock dust machine 
 ti=%fi|%!%g| Operate shuttle car 
 
 Figure B-1 .-Fatal electrical accidents in underground coal mines, 1 980-85. Activity engaged in when accident occurred. 
 
 Ld 
 Q 
 h-l 
 O 
 U 
 
 a: 
 
 Ld 
 
 14t 
 
 12-- 
 
 10- 
 
 G-- 
 
 13 
 
 12 
 
 KEY 
 
 I | Electrical apparatus 
 
 I I I I I I Conductors, cables, trolley poles 
 
 Y////A Transformers, converters 
 
 IvSSSSl Underground mining machines 
 
 I I Mine jeep, jitney 
 
 Figure B-1. -Fatal electrical accidents in underground coal mines, 1980-85-Continued. Source of injury. 
 
50 
 
 Ld 
 Q 
 l-l 
 (_> 
 O 
 
 LU 
 
 KEY 
 I 1 Electrician 
 
 I I I I 1 1 Laborer,, muck machine 
 operator 
 
 Y////\ Maintenance foreman 
 k^^j Roof bolter 
 I | Mechanic 
 
 Labor foreman 
 
 Mine foreman 
 
 I I I I II Blaster 
 
 ^| Dn ill operator 
 
 £Pf5%1 Motorman 
 
 Figure B-1 .-Fatal electrical accidents in underground coal mines, 1 980-85-Continued. Job title. 
 
 KEY 
 I I Continuous 
 
 I I I I 1 1 Conuent ional-stope 
 
 V///A Not defined 
 
 £\^3 Longuall 
 
 Figure B-1 .-Fatal electrical accidents in underground coal mines, 1 980-85-Continued. Mining method. 
 
51 
 
 en 
 
 Ld 
 Q 
 1-1 
 <_> 
 <_> 
 
 <x 
 
 Ld 
 
 CD 
 
 14t 
 
 12- 
 
 10- 
 
 6-- 
 
 4" 
 
 2-- 
 
 13 
 
 11 
 
 KEY 
 Face 
 
 rrrrri other 
 
 X////A Intersection 
 KSS>Nl Not defined 
 
 Figure B-1. -Fatal electrical accidents in underground coal mines, 1 980-85-Continued. Location. 
 
 en 
 
 H 
 
 z: 
 
 UJ 
 Q 
 
 o 
 
 a: 
 
 o 
 
 Ld 
 00 
 
 14t 
 
 12-- 
 
 10-- 
 
 8- 
 
 6-- 
 
 4" 
 
 KEY 
 
 12 
 
 Unknown 
 
 I I I I II Roof bolter 
 
 \////A Continuous miner, tunnel borer 
 
 RsN^l Shuttle car 
 
 I | Pump 
 
 KR^&j Man trip, man car, jeep, 
 personnel carrier, etc. 
 
 EOQ^ Cutting machine (mining only),. 
 chain cutter 
 
 I I I I 1 1 Rock drill, jack leg, jackhammer, 
 drifter, etc. 
 
 | Mine car, nipper truck, timber, 
 truck (underground only) 
 
 frf&^&j Rock duster 
 
 Figure B-1 .-Fatal electrical accidents in underground coal mines, 1 980-85-Continued. Machine. 
 
52 
 
 tn 
 
 500 
 
 450+4 33 
 400 
 350 
 
 LU 
 
 q 300 
 
 <-> 
 cr 
 
 250- - 
 
 £ 200- 
 
 150- 
 100- 
 50" 
 
 128 
 
 85 
 
 v/k± 
 
 69 
 
 60 
 
 ^ 3 - 5 . 35 ,30 gg 
 
 KEY 
 
 I I Maintain, repair 
 
 electrical equipment 
 
 I I I I 1 1 Handle supplies, material 
 Y////\ Maintain machine 
 PSSS>\l Moue power cable 
 I | Rerail equipment 
 
 Operate locomotiue 
 
 ^Hjj Operate,, ride man trip 
 
 I I I I 1 1 Inspect machinery 
 
 ^| Use handtools 
 
 t£%$£$| Escaping a hazard 
 
 Figure B-2.-Nonfatal electrical accidents in underground coal mines, 1980-85. Activity engaged in when accident 
 occurred. 
 
 en 
 
 h- 
 r 
 
 Ld 
 Q 
 y-t 
 
 O 
 
 UJ 
 
 cn 
 
 550-- 
 500-- 
 450-- 
 400-- 
 350 
 300 
 250-- 
 200-- 
 150" 
 100" 
 50- 
 
 KEY 
 
 478 
 
 466 
 
 I | Electrical apparatus 
 
 I I I I 1 1 Conductors, cables, trolley 
 po les 
 
 X////\ Flame, fire, smoke 
 IvSS^^nI Transformers, converters 
 I I Floor, bottom 
 |%^$^ Underground mining machines 
 Mine jeep, jitney 
 
 I I I I 1 1 Acids, alkalies (uet cement) 
 
 ~| Underground narrow-gage 
 rai lcars 
 
 l^gaSjtfi Posts, caps, timbers 
 
 Figure B-2.-Nonfatal electrical accidents in underground coal mines, 1980-85-Continued. Source of injury. 
 
53 
 
 CO 
 
 Ld 
 Q 
 I— I 
 U 
 
 a: 
 
 LlI 
 CD 
 
 240-- 
 
 220 
 
 200-- 
 
 188" 
 
 168" 
 
 148- 
 
 128- 
 
 188- 
 
 88" 
 
 68" 
 
 48-- 
 
 28-- 
 
 214 
 
 284 
 
 KEY 
 Mechan ic 
 
 !JJ E lectr ic ian 
 
 Y////X Laborer, muck 
 
 machine operator 
 
 E>NSS^ Motorman 
 
 I | Shuttle car operator 
 
 K&S&Sl Roof bolter 
 
 ^"m"^ Labor foreman 
 
 I I I I 1 1 Maintenance foreman 
 
 I Continuous miner operator 
 
 t£g§ig&al Continuous miner helper 
 
 Figure B-2. -Nonfatal electrical accidents in underground coal mines, 1980-85-Continued. Job title. 
 
 CO 
 
 z: 
 
 UJ 
 Q 
 l-t 
 U 
 
 <x 
 
 ui 
 
 700T 
 
 608-- 
 
 508-- 
 
 488-- 
 
 300-- 
 
 200-- 
 
 188- 
 
 653 
 
 295 
 
 126 
 
 KEY 
 ~\ Continuous 
 
 I | | | H Not defined 
 Y////\ Conuent ional-Stope 
 E^3 Longuall 
 I I Other 
 
 Shortwa 1 1 
 
 W^^ Hand 
 
 0- 
 Figure B-2.-Nonfatal electrical accidents in underground coal mines, 1980-85-Continued. Mining method. 
 
54 
 
 550t 
 
 500 
 
 -- 433 
 
 z: 
 
 Ld 
 Q 
 l-l 
 
 <_> 
 
 <r 
 
 Ld 
 00 
 
 450-- 
 
 400-- 
 
 350-- 
 
 300-- 
 
 £50-- 
 
 200- 
 
 150" 
 
 100" 
 
 50-- 
 
 220 
 
 KEY 
 I | Other 
 
 rrrrn Face 
 
 V///A Not defined 
 b\\S^\S Intersection 
 I I Shop 
 
 Uertical shaft 
 
 JQ^ Inclined shaft 
 
 Figure B-2.- Nonfatal electrical accidents in underground coal mines, 1980-85-Continued. Location. 
 
 700T 
 
 LD 
 
 Ld 
 O 
 l-H 
 <_> 
 O 
 
 <r 
 
 o 
 
 
 600-- 
 
 500-- 
 
 400-- 
 
 300-- 
 
 200-- 
 
 100- 
 
 613 
 
 221 
 
 157 
 
 ,32 ?? P7 
 
 KEY 
 
 | | Electrical arc burn 
 
 MiM] Electrical burn 
 (contact burn) 
 
 X////X Electrical shock 
 Ce lectrocut ion ) 
 
 ESXS>\I Burn or scald (heat) 
 | I Multiple injuries 
 Asphyx ia 
 
 ^^fl| Bruise 
 | | Sprain, strain 
 | Chemical burns 
 WM£M Laceration, cut, puncture 
 
 Figure B-2.-Nonfatal electrical accidents in underground coal mines, 1980-85-Continued. Nature of injury. 
 
55 
 
 700T 
 
 co 
 
 h- 
 z: 
 
 Ld 
 O 
 I— I 
 
 <_> 
 
 <r 
 
 o 
 
 Ld 
 
 680-- 
 
 500- 
 
 400-- 
 
 3B0-- 
 
 200-- 
 
 180" 
 
 624 
 
 378 
 
 [ 
 
 wzzx 
 
 KEY 
 Flash burns, electric 
 
 Electric current 
 
 Contact with hot substance 
 
 Inhalation of toxics 
 
 Fall from machine 
 
 Struck against 
 
 stationary object 
 
 b^w"d Absorption of toxics 
 
 | | | [ 1 1 Struck , not elsewhere 
 c lass if ied 
 
 | Struck by flying object 
 
 Pe^sj Struck against mouing object 
 
 E^^IUL 7 s s 
 
 Figure B-2.- Nonfatal electrical accidents in underground coal mines, 1980-85-Continued. Accident type. 
 
 CO 
 
 LU 
 Q 
 
 n 
 u 
 
 <r 
 
 Ld 
 
 400 T 
 
 350 
 
 300-- 
 
 250 
 
 208-- 
 
 158-- 
 
 188-- 
 
 58-- 
 
 KEY 
 
 | | Hand 
 
 [; I ! J ] Body systems 
 
 Y////X Multiple injuries 
 E^ Eyes 
 I | F ingers 
 
 E*/<$<5<^ Upper extremities, 
 mu 1 1 i p 1 e 
 
 HH3 Urist 
 r^Leg 
 I Arm 
 
 \&M($ik Face, multiple parts 
 
 Figure B-2.- Nonfatal electrical accidents in underground coal mines, 1980-85-Continued. Part of body. 
 
56 
 
 6t 
 
 5" 
 
 r 
 
 Ixl 
 Q 
 t-H 
 <_> 
 <_> 
 <X 
 
 3+ 
 
 LU 
 
 m 
 
 z: 
 
 a-- 
 
 KEY 
 
 I 1 Maintain, repair 
 
 electrical equipment 
 
 Mill] Handle supplies, material 
 
 X////X Maintain machine 
 
 R^^nSSI Getting on-off equipment 
 
 Figure B-3. -Fatal electrical accidents at the surface at underground coal mines, 1980-85. Activity engaged in when 
 fatality occurred. 
 
 o 
 
 l-H 
 
 o 
 
 (V 
 
 UJ 
 
 5" 
 
 4- 
 
 3- 
 
 KEY 
 
 I | Electrical apparatus 
 
 j i | |] Conductors, cables, trolley 
 poles 
 
 Y////X Transformers, converters 
 
 Figure B-3.- Fatal electrical accidents at the surface at underground coal mines, 1980-85-Continued. Source 
 of injury. 
 
57 
 
 6t 
 
 5" 
 
 <s> 
 
 u 
 
 Q 
 l-H 
 
 u 
 a 
 
 Ld 
 
 3" 
 
 KEY 
 
 I I Electrician 
 
 I I I I II Mechanic 
 
 V///A Master electrician 
 
 KSSSS1 Mine foreman 
 
 I I Truck driuer 
 
 Rff*!%&j Tipple operator 
 
 Figure B-3.- Fatal electrical accidents at the surface at underground coal mines, 1980-85-Continued. Job title. 
 
 en 
 
 i- 
 z: 
 
 Ld 
 O 
 l-H 
 
 u 
 <_> 
 <r 
 
 Ld 
 CD 
 
 KEY 
 
 I | Not recorded in 
 MSHA database 
 
 I I I I 1 1 Machine, not elsewhere 
 classified 
 
 ^Fan 
 
 RsSSSI Ore haulage truck, 
 of f -highway 
 
 Figure B-3.- Fatal electrical accidents at the surface at underground coal mines, 1980-85-Continued. Machine. 
 
58 
 
 UJ 
 Q 
 I— I 
 
 o 
 <x 
 
 80t 
 
 70-- 69 
 
 60- 
 
 50-- 
 
 40 
 
 o 
 ct: 
 
 UJ 
 
 30+ 
 
 20-- 
 
 10-- 
 
 KEY 
 
 I | Maintain, repair 
 
 electrical equipment 
 
 [ 
 
 Maintain machine 
 
 Y////\ Handle supplies, material 
 [cvnSS^I Use handtools 
 [ | Rerail equipment 
 
 Operate locomotiue 
 
 ^"■"^ Inspect machinery 
 I I I I 1 1 Moue power cable 
 
 | Operate surface equipment 
 jj&li Idle 
 
 Figure B-4.- Nonfatal electrical accidents at the surface at underground coal mines, 1980-85. Activity engaged in 
 when accident occurred. 
 
 <s> 
 
 UJ 
 Q 
 I— I 
 
 u 
 
 o 
 
 Q_ 
 UJ 
 
 70T 
 
 60-- 
 
 58- 
 
 40 
 
 30-- 
 
 20- - 
 
 67 
 
 24 
 
 KEY 
 Electrical apparatus 
 
 Mill] Conductors, cables, trolley 
 poles 
 
 Y////X Acids, alkalies (wet cement) 
 
 RS^vNJ Ground (surface) 
 
 | | Flame, fire, smoke 
 
 P$<$$<$i Transformers, conuerters 
 
 Underground narrow-gage 
 ra i lcars 
 
 FFFffl Motors 
 
 | | Mine jeep, jitney 
 
 l&ff§&1 Metal (pipe, wire, nails, etc.) 
 
 Figure B-4. 
 of Injury. 
 
 -Nonfatal electrical accidents at the surface at underground coal mines, 1980-85-Continued. Source 
 
59 
 
 35t 
 
 KEY 
 I | Mechanic 
 fj I j ']] Electrician 
 
 V777A Laborer 
 RSSS^SM Maintenance foreman 
 Mine foreman 
 
 RR£$^ Motorman 
 
 lB M »"d Unknown 
 
 I I I I 1 1 Shuttle car operator 
 
 [ | Superintendent 
 
 IftWS;^ Master electrician 
 
 Figure B-4.- Nonfatal electrical accidents at the surface at underground coal mines, 1980-85-Continued. Job title. 
 
 IS) 
 
 \- 
 7L 
 UJ 
 Q 
 
 U 
 (_> 
 
 70T 
 
 60-- 
 
 50- 
 
 40- 
 
 KEY 
 
 o 
 
 K 30+ 
 
 UJ 
 
 CO 
 
 20- 
 
 10-- 
 
 62 
 
 15 
 
 10 
 
 7 
 
 aka 
 
 3 3 3 
 
 a8& 
 
 I | Not recorded in MSHfi database 
 
 I I I I 1 1 Locomotiue, rai 1 -mounted; 
 lorry car 
 
 X////A Nonpowered handtools 
 
 Man trip, man car, jeep, 
 personnel carrier, etc, 
 
 I I Conueyor, all types; belt feeder 
 Machine, not elsewhere classified 
 
 Wm~d Front -end loader , tractor -shoue 1, 
 highlift, skip-loader, etc. 
 
 I I I I 1 1 Load -haul -dump, scoop, tram, 
 ramcar, etc. 
 
 ! | welder 
 
 \0M#M Powered handtools 
 
 Figure B-4.- Nonfatal electrical accidents at the surface at underground coal mines, 1980-85-Continued. Machine. 
 
60 
 
 en 
 
 o 
 a: 
 
 ex. 
 
 Ld 
 
 70T 
 
 60" 
 
 50" 
 
 40- 
 
 30-- 
 
 20- 
 
 10- 
 
 63 
 
 21 
 
 14 
 
 6 6 
 
 ■ 
 
 4 4 
 
 1 1 
 
 KEY 
 
 I | Electrical arc burn 
 
 I I I I 1 1 Electrical burn 
 (contact burn) 
 
 Y///A Electrical shock 
 (e lectrocut ion ) 
 
 lv\ s \\SJ Chemical burns 
 
 Burn or scald (heat) 
 Multiple injuries 
 
 b*B M d Laceration, cut, puncture 
 | | | | 1 1 Sprain, strain 
 
 | Bruise 
 K^MH Poisoning 
 
 Figure B-4.-Nonfatal electrical accidents at the surface at underground coal mines, 1 980-85-Continued. Nature of 
 injury. 
 
 CO 
 
 \- 
 z: 
 
 Ld 
 Q 
 1—1 
 <_> 
 
 <r 
 
 70t 
 
 60" 
 
 50" 
 
 40- 
 
 KEY 
 
 o 
 
 a. 30+ 
 
 Ld 
 
 e: 
 
 20" 
 
 10-- 
 
 61 
 
 37 
 
 6 6 
 
 I | Flash burns, electric 
 
 EMMI Electric current 
 V///A Absorption of toxics 
 
 KSSSSl Contact with 
 
 hot substance 
 
 I | Struck against 
 
 stationary object 
 
 I&&&H Fall from ladder 
 
 BS!3 Struck by flying object 
 
 | | | | 1 1 Fall from machine 
 
 | Caught in, under, or 
 
 between a mouing and a 
 stationary object 
 
 l^lfc&ffi Fall to working surface 
 
 Figure B-4.-Nonfatal electrical accidents at the surface at underground coal mines, 1 980-85-Continued. Accident type. 
 
61 
 
 in 
 
 u 
 o 
 
 H 
 
 u 
 
 uj 
 
 00 
 
 KEY 
 Hand 
 
 [TT! 1 I ] Multiple injuries 
 
 ^Eyes 
 
 RS^\\1 Body systems 
 
 I | Upper extremities, 
 
 mu 1 1 i p 1 e 
 
 F ingers 
 
 ESS Arm 
 
 ^Back 
 I Urist 
 
 SUf 
 
 ace 
 
 Figure B-4.- Nonfatal electrical accidents at the surface at underground coal mines, 1980-85-Continued. Part of body. 
 
62 
 
 4 St 
 
 40-- 39 
 
 35- 
 
 {2 38- 
 
 z: 
 
 UJ 
 O 
 l-H 
 
 o 25-- 
 
 o 
 
 UJ 
 lQ 
 
 z: 
 
 3 
 
 20- 
 
 15- 
 
 10- 
 
 KEY 
 
 I | Maintain, repair 
 
 electrical equipment 
 
 I I I I 1 1 Handle supplies, material 
 Y////\ Maintain machine 
 PSSS>\l Rerail equipment 
 
 Ueld, cut 
 
 Caging 
 
 Operate locomotiue 
 
 MB Idle 
 
 ~| Drill face, rib, side 
 ijg£;S£i Escaping a hazard 
 
 Figure B-5.-Nonfatal electrical accidents in underground metal-nonmetal mines, 1980-85. Activity engaged in when 
 accident occurred. 
 
 45t 
 
 40- 
 
 35-- 
 
 H 30+ 
 
 Z 
 
 UJ 
 
 Q 
 
 l-H 
 
 O £5-- 
 
 <r 
 
 uj 
 
 3 
 
 20-- 
 
 15-- 
 
 10-- 
 
 5-- 
 
 38 
 
 26 
 
 3 3 3 
 
 2 2 
 
 KEY 
 
 I I Electrical apparatus 
 
 I I I I [ I Conductors, cables, trolley 
 po les 
 
 Y////^ Underground mining machines 
 k\SSSi Machines, office machines 
 I | Flame, fire, smoke 
 
 Eleuators, cages, skips 
 
 bB^j Acids, alkalies (wet cement) 
 I I I I 1 1 Surface mining machines 
 
 | Ueh ic les 
 plf&Sf Passenger cars, trucks 
 
 Figure B-5.- Nonfatal electrical accidents in underground metal-nonmetal mines, 1980-85-Continued. Source of injury. 
 
63 
 
 22" 
 20-- 
 18-- 
 16- 
 
 5 14 + 
 
 Q 
 M 
 
 8 12 
 <r 
 
 QL 
 
 u 
 
 10" 
 
 20 
 
 rr 
 
 KEY 
 Electric ian 
 
 Mechanic 
 
 WZZk Miner 
 
 IsSSSSJ Motorman 
 
 I | Laborer, muck 
 
 machine operator 
 
 Labor foreman 
 
 H^H Blaster 
 
 I I I I I I Utility man 
 
 | Trainee 
 
 IP^S^vl Unknown 
 
 Figure B-5.- Nonfatal electrical accidents in underground metal-nonmetal mines, 1980-85-Continued. Job title. 
 
 en 
 
 i- 
 
 Ld 
 Q 
 I— I 
 <_> 
 <_> 
 <I 
 
 Ld 
 
 12t 
 
 10-- 
 
 8- 
 
 11 
 
 KEY 
 Unknown 
 
 || j j j | J Machine, not 
 
 elsewhere classified 
 
 V///A welder 
 R^ Pump 
 
 3 Rock drill, jack leg, 
 
 jackhammer, drifter, etc. 
 
 Nonpowered handtools 
 
 JBI Roof bolter 
 
 | | | | 1 1 Man trip, man car, jeep, 
 personnel carrier, etc. 
 
 I Powered handtools 
 
 WMrkWh Hydraulic, electric 
 core dr i 1 Is 
 
 Figure B-5.- Nonfatal electrical accidents in underground metal-nonmetal mines, 1980-85-Continued. Machine. 
 
64 
 
 35t 
 
 KEY 
 
 J Electrical shock 
 (electrocut ion ) 
 
 II 1 I 1 fl Electrical arc burn 
 
 X///A Electrical burn 
 (contact burn) 
 
 E5s5sl Asphyxia 
 
 I 1 Burn or scald (heat) 
 
 Chemical burns 
 
 Multiple injuries 
 I I I 1 1 1 Laceration, cut, puncture 
 
 J Sprain, strain 
 [^£$£13 Bruise 
 
 Figure B-5.-Nonfatal electrical accidents in underground metal-nonmetal mines, 1980-85-Continued. Nature of injury. 
 
 40t 
 
 KEY 
 Body systems 
 
 Hand 
 
 ^Eyes 
 
 IsSSSSJ Multiple injuries 
 
 I [ Upper extremities, 
 
 mu 1 1 i p 1 e 
 
 E 
 
 Ankle 
 F ingers 
 Arm 
 Ur ist 
 
 BH For. 
 
 Figure B-5.-Nonfatal electrical accidents in underground metal-nonmetal mines, 1980-85-Continued. Part of body. 
 
65 
 
 C/) 
 
 O 
 M 
 O 
 O 
 
 QL 
 
 LU 
 
 20-- 
 18" 
 16-- 
 14" 
 12-- 
 10-- 
 
 6 
 
 4-- 
 
 2-- 
 
 19 
 
 11111 
 
 feg&pot™ 
 
 KEY 
 
 ~] Maintain, repair 
 
 electrical equipment 
 
 j [ |] Handle supplies, material 
 Y////\ Maintain machine 
 E^3 Caging 
 
 | | Install and maintain 
 
 uent i lat ion 
 
 Use powered handtools 
 
 LHH Idle 
 
 I || I 1 1 Moue equipment 
 
 | Operate surface equipment 
 
 Figure B-6.- Nonfatal electrical accidents at the surface at underground metal-nonmetal mines, 1980-85. Activity 
 engaged in when accident occurred. 
 
 KEY 
 
 I | Electrical apparatus 
 
 :] Acids, alkalies (wet cement) 
 
 V///A Conductors, cables, trolley 
 poles 
 
 KSSSN Drill, rotary 
 
 I | Movable ladders 
 
 R££%Rj Surface mining machines 
 
 Figure B-6.- Nonfatal electrical accidents at the surface at underground metal-nonmetal mines, 1980-85-Continued. 
 Source of injury. 
 
66 
 
 <r 
 
 en 
 
 Ld 
 
 en 
 
 z: 
 =) 
 
 12T 
 
 18" 
 
 6" 
 
 4- 
 
 11 
 
 KEY 
 Electrician 
 
 I I I I II Mechanic 
 Y////X Tipple operator 
 K>\\S>\I Stopping builder 
 I | Electrical helper 
 
 Maintenance foreman 
 
 b%^j Mine foreman 
 I I I I 1 1 Drill operator 
 
 | Truck driuer 
 fe£Si:g£3 Laborer 
 
 Figure B-6.-Nonfatal electrical accidents at the surface at underground metal-nonmetal mines, 1980-85-Continued. 
 Job title. 
 
 18t 
 
 16-- 
 
 14-- 
 
 12-- 
 
 y 10+ 
 
 UJ 
 
 8-- 
 
 6-- 
 
 17 
 
 KEY 
 
 I | Not recorded in MSHA database 
 IJLLLG Skip,, eleuator, cage 
 
 \////A Service trucks pickup, utility 
 truck (not ore haulage) 
 
 R\SSSl Nonpowered handtools 
 I | Crane, derrick 
 
 Machine, not 
 
 elsewhere classified 
 
 ea pump 
 
 I I I l l I Jumbo carr i age -mounted 
 
 drills on rails, tracks, tires 
 
 I Compressor 
 
 Pff£#&i Pneumatic blasting agent loader 
 
 Figure B-6.-Nonfatal electrical accidents at the surface at underground metal-nonmetal mines, 1980-85-Continued. 
 Machine. 
 
67 
 
 16t 
 
 KEY 
 Electrical arc burn 
 
 |~T] Chemical burns 
 
 V///A Electrical shock 
 (electrocution) 
 
 KS^\\Sl Electrical burn 
 (contact burn) 
 
 I | Amputation 
 
 Figure B-6.-Nonfatal electrical accidents at the surface at underground metal-nonmetal mines, 1980-85-Continued. 
 Nature of injury. 
 
 KEY 
 
 I | Flash burns, electric 
 I I I I 1 1 Electric shock 
 Y////X Absorption of toxics 
 
 Figure B-6.-Nonfatal electrical accidents at the surface at underground metal-nonmetal mines, 
 1980-85-Continued. Accident type. 
 
68 
 
 KEY 
 
 I | Multiple injuries 
 
 □UDEyes 
 
 Y////X Body systems 
 ^Hcnd 
 Face 
 
 KR&ffi Upper extremities, 
 mu 1 1 i p 1 e 
 
 bflfld Fingers 
 FFFffl Neck 
 
 | Face / multiple parts 
 
 Figure B-6. 
 Part of body. 
 
 -Nonfatal electrical accidents at the surface at underground metal-nonmetal mines, 1980-85-Continued. 
 
 INT.BU.OF MINES,PGH.,PA 29174 
 
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