Coal Mine Health and Safety: Hearing, Ninety-first Congress, First Session ... Sept. 9, 1969, Volume 4 |
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Appalachian BELL bill bituminous coal blasting BRADBURY Bureau of Mines Carbide lamp cause Chairman PERKINS classed gassy classification coal dust coal industry Coal Mine Safety coal mines Coal_ committee continuous miner cost danger DENT disasters diseases drift mines eastern Kentucky economic electric face equipment eliminate ERLENBORN fatalities Federal Coal feet Floyd County Frictional spark gassy and nongassy gassy mines going Health ignitions and explosions injuries inspection inspectors JOHN SHERMAN COOPER July killed large mines legislation machinery Medical ment methane methane monitor MOSGROVE nonfatals nongassy mines Number of ignitions occurred Open flame lamp Pathology Pennsylvania percent permissible equipment Pike County pneumoconiosis problem produce pulmonary require roof Safety Act School of Medicine seams Senator BURKE Senator COOPER shuttle car small nongassy smoking so-called nongassy Spark and ventilation Spindletop statement subcommittee tion truck mines University University of Kentucky West Virginia Νον