TABLE 31 - Fatal and nonfatal disabling injuries and man-hours for associated
surface workings at underground metal, nonmetal and stone mines
with summarized data and injury-frequency rates, 1950-77
Metal 1/ Nonmetal 2/
Year
Fatal Nonfatal Man-hours Fatal Nonfatal Man-hours
1950 2 1,021 41,351,271 NA NA NA
1951 10 1,225 43,495,863 NA NA NA
1952 4 1,026 41,043,852 NA NA NA
1953 5 1,121 40,021,175 NA NA NA
1954 2 401 24,843,236 - 263 9,477,443
1955 7 594 24,321,314 2 179 8,016,874
1956 7 605 23,350,782 2 247 9,438,879
1957 5 516 25,617,807 1 230 11,993,685
1958 8 322 18,590,696 1 107 2,360,873
1959 6 267 16,652,313 1 88 2,561,088
1960 4 280 14,971,409 - 126 2,884,750
1961 3 257 15,261,788 1 55 2,991,295
1962 5 296 14,645,572 - 101 2,925,937
1963 1 243 13,096,276 - 81 3,060,603
1964 5 246 14,976,454 1 70 3,806,633
1965 - 176 15,357,255 1 51 3,272,844
1966 2 244 14,630,915 - 53 3,438,144
1967 3 194 13,869,753 - 58 3,040,966
1968 4 181 13,256,586 3 70 2,785,457
1969 3 192 13,448,409 1 85 2,645,719
1970 1 226 12,672,282 1 71 2,848,490
1971 - 215 12,540,598 - 63 2,679,184
1972 - 223 11,240,005 - 44 2,666,682
1973 2 240 8,849,572 1 37 1,945,184
1974 2 205 9,230,410 1 23 2,061,517
1975 5 129 10,401,349 7 38 2,291,679
1976 2 139 9,940,110 - 20 1,384,355
1977 2 154 8,759,543 - 27 1,434,378
NA Not available.
1/ Data for 1950-53 includes nonmetal mine data; cannot be separated by detailed
work location.
2/ Mine data 1950-53, included with metal data. Clay mine data first compiled
in 1955.
Stone
Year
Fatal Nonfatal Man-hours
1950 - - -
1951 - - -
1952 1 39 1,662,042
1953 - 22 1,857,470
1954 - 19 1,034,512
1955 - 51 1,531,903
1956 1 50 1,611,135
1957 - 32 1,352,341
1958 - - -
1959 - - -
1960 - - -
1961 - - -
1962 - 41 1,004,626
1963 - 10 982,343
1964 1 18 1,313,469
1965 - 19 1,584,755
1966 3 42 1,619,848
1967 1 24 1,474,304
1968 - 23 1,470,044
1969 3 33 1,291,571
1970 2 38 1,361,930
1971 1 61 1,264,592
1972 - 28 1,173,508
1973 - 13 955,098
1974 - 10 1,170,831
1975 - 30 1,170,904
1976 - 26 909,210
1977 - 26 841,340
NA Not available.
1/ Data for 1950-53 includes nonmetal mine data; cannot be separated by detailed
work location.
2/ Mine data 1950-53, included with metal data. Clay mine data first compiled
in 1955.
Total injuries Total Frequency rates per
Year Man-hours million man-hours
Fatal Nonfatal Fatal Nonfatal
1950 2 1,021 41,351,271 0.05 24.69
1951 10 1,225 43,495,863 0.23 28.16
1952 5 1,065 42,705,894 0.12 24.94
1953 5 1,143 41,878,645 0.12 27.29
1954 2 683 35,355,191 0.06 19.32
1955 9 824 33,870,091 0.27 24.33
1956 10 902 34,400,796 0.29 26.22
1957 6 778 38,963,833 0.15 19.97
1958 9 429 20,951,569 0.43 20.48
1959 7 355 19,213,401 0.36 18.48
1960 4 406 17,856,159 0.22 22.74
1961 4 312 18,253,083 0.22 17.09
1962 5 438 18,576,135 0.27 23.58
1963 1 334 17,139,222 0.06 19.49
1964 7 334 20,096,556 0.35 16.62
1965 1 246 20,214,854 0.05 12.17
1966 5 339 19,688,907 0.25 17.22
1967 4 276 18,385,023 0.22 15.01
1968 7 274 17,512,087 0.40 15.65
1969 7 310 17,385,699 0.40 17.83
1970 4 335 16,882,702 0.24 19.84
1971 1 339 16,484,374 0.06 20.56
1972 - 295 15,080,195 - 19.56
1973 3 290 11,749,854 0.26 24.68
1974 3 238 12,462,758 0.24 19.10
1975 12 197 13,863,932 0.87 14.21
1976 2 185 12,233,675 0.16 15.12
1977 2 207 11,035,261 0.18 18.76
NA Not available.
1/ Data for 1950-53 includes nonmetal mine data; cannot be separated by detailed
work location.
2/ Mine data 1950-53, included with metal data. Clay mine data first compiled
in 1955.
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