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APPENDIX B. ACCIDENT STATISTICS COVERING COAL MINES IN THE UNITED STATES

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FIGURE 1.-Fatality rates in bituminous-coal mines of the United States based on manhours of exposure (portal to portal).

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FIGURE 2.-Nonfatality rates in bituminous-coal mines of the United States based on manhours of exposure (portal to portal).

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FIGURE 3.-Fatality rates in anthracite mines of Pennsylvania based on man-hours of exposure (portal to portal).

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FIGURE 4.-Nonfatality rates in anthracite mines of Pennsylvania based on man-hours of exposure (portal to portal).

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1920 1922 1924 1926 1928 1930 1932 1934 1936 1938 1940 1942 1944 1946 1948

FIGURE 5.-Fatalities in major gas or dust explosions in bituminous-coal and anthracite mines of the United States.

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Comparative fatalities and fatality rates per million tons of coal produced during the first 4 months of 1948 and 1949, respectively

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Number of fatal and nonfatal injuries in coal mines in the United States

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Fatalities and a comparison of fatality rates based on man-hours exposure in underground bituminous coal mines, by employment groups

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1 These fatalities occurred in underground bituminous coal mines employing less than 25 men. NOTE.-These data cover only underground employees. They do not include surface employees nor strip-mine employees. The man-hours are based on working time, and not on portal-to-portal time.

Number of men killed in major gas and dust explosions in coal mines of the United States

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