TABLE 7B. - Fatal injury-severity rates per million man-hours,
by general work location, at bituminous coal mines
in the United States, 1931-77
Underground mines Total
Year underground
Underground Surface mining
1931 10,447 4,078 9,715
1932 11,501 4,698 10,654
1933 8,455 3,851 7,862
1934 9,209 3,940 8,536
1935 9,495 3,597 8,758
1936 9,405 3,094 8,610
1937 10,161 4,001 9,406
1938 10,041 3,265 9,179
1939 9,148 2,681 8,328
1940 11,204 3,154 10,192
1941 8,987 2,691 8,176
1942 9,367 3,661 8,584
1943 9,462 2,942 8,484
1944 8,465 2,523 7,495
1945 7,898 2,634 7,013
1946 7,656 2,665 6,817
1947 8,726 2,265 7,657
1948 8,106 2,465 7,154
1949 6,402 3,436 5,896
1950 6,362 2,977 5,775
1951 8,364 2,285 7,320
1952 6,302 2,630 5,666
1953 6,388 2,305 5,667
1954 7,216 2,916 6,413
1955 6,807 3,109 6,113
1956 7,560 2,206 6,558
1957 8,765 2,723 7,628
1958 8,872 2,291 7,593
1959 7,052 2,275 6,094
1960 8,639 2,943 7,498
1961 9,438 2,783 8,098
1962 9,109 3,015 7,874
1963 8,673 1,893 7,308
1964 7,385 2,301 6,404
1965 8,430 2,855 7,375
1966 7,588 2,039 6,833
1967 6,645 3,328 6,227
1968 10,978 2,445 9,966
1969 5,692 4,230 5,532
1970 7,574 4,498 7,256
1971 5,518 2,570 5,196
1972 4,278 2,138 4,084
1973 3,438 2,160 3,325
1974 3,089 2,016 2,988
1975 2,831 3,079 2,856
1976 2,872 1,260 2,713
1977 2,392 2,237 2,375
NA Not available.
Total
Year Strip Auger Culm Dredges surface Total
banks mining mining
1931 1,319 NA NA NA 1,319 9,602
1932 7,455 NA NA NA 7,455 10,602
1933 5,815 NA NA NA 5,815 7,832
1934 5,135 NA NA NA 5,135 8,489
1935 7,340 NA NA NA 7,340 8,733
1936 5,947 NA NA - 5,947 8,558
1937 2,738 NA NA - 2,738 9,256
1938 6,622 NA NA - 6,622 9,107
1939 2,890 NA NA - 2,890 8,169
1940 5,965 NA NA - 5,965 10,062
1941 6,866 NA NA - 6,866 8,127
1942 5,316 NA NA - 5,316 8,455
1943 4,864 NA - - 4,864 8,317
1944 5,440 NA - - 5,440 7,371
1945 3,901 NA - - 3,901 6,791
1946 3,507 NA - - 3,507 6,552
1947 4,064 NA - - 4,064 7,360
1948 4,628 NA - - 4,628 6,917
1949 2,500 NA - - 2,500 5,559
1950 3,513 NA - - 3,513 5,548
1951 3,371 NA - - 3,371 6,951
1952 3,122 NA - - 3,122 5,411
1953 2,724 NA - - 2,724 5,361
1954 2,388 NA - - 2,388 5,934
1955 3,064 11,983 - - 3,365 5,785
1956 3,205 4,468 - - 3,274 6,134
1957 2,910 7,631 - - 3,144 7,040
1958 2,279 8,803 - - 2,581 6,821
1959 2,765 - - - 2,642 5,535
1960 2,910 8,317 - - 3,179 6,768
1961 2,191 3,192 - - 2,237 7,085
1962 2,598 2,587 - - 2,597 6,913
1963 2,815 6,433 - - 3,049 6,513
1964 2,232 2,439 - - 2,244 5,637
1965 2,604 2,521 - - 2,599 6,474
1966 3,439 6,251 - - 3,635 6,217
1967 3,220 4,387 - - 3,296 5,652
1968 3,386 11,984 - - 4,001 8,759
1969 3,662 5,901 - - 3,817 5,176
1970 3,319 6,502 - - 3,542 6,422
1971 2,386 4,766 - - 2,538 4,513
1972 2,165 3,085 - - 2,199 3,674
1973 1,733 3,462 - - 1,785 2,965
1974 2,029 6,369 - - 2,141 2,754
1975 1,966 12,383 - - 2,119 2,641
1976 1,364 5,229 - - 1,404 2,322
1977 1,338 10,689 - - 1,425 2,053
NA Not available.
Independent Mechanical
Year shops and cleaning Grand
yards plants total
1931 NA NA 9,602
1932 NA NA 10,602
1933 NA NA 7,832
1934 NA NA 8,489
1935 NA NA 8,733
1936 NA NA 8,558
1937 NA NA 9,256
1938 NA NA 9,107
1939 NA NA 8,169
1940 NA NA 10,062
1941 NA NA 8,127
1942 NA NA 8,455
1943 NA NA 8,317
1944 NA NA 7,371
1945 NA NA 6,791
1946 NA NA 6,552
1947 NA NA 7,360
1948 NA NA 6,917
1949 NA NA 5,559
1950 NA NA 5,548
1951 NA NA 6,951
1952 NA NA 5,411
1953 NA NA 5,361
1954 NA NA 5,934
1955 NA NA 5,785
1956 NA NA 6,134
1957 NA NA 7,040
1958 NA NA 6,821
1959 NA NA 5,535
1960 NA NA 6,768
1961 NA NA 7,085
1962 NA NA 6,913
1963 NA NA 6,513
1964 NA NA 5,637
1965 NA NA 6,474
1966 NA 1,895 5,919
1967 NA 4,491 5,571
1968 NA 1,513 8,245
1969 NA 2,749 5,013
1970 NA 1,834 6,121
1971 NA 1,216 4,313
1972 - 2,142 3,513
1973 2,344 2,220 2,894
1974 - 2,641 2,695
1975 - 1,752 2,527
1976 - 1,519 2,222
1977 903 1,547 1,993
NA Not available.
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