Report issued by the Bureau of Mines over recovery methods of alumina through leaching of kaolin clay. The materials, equipment, and procedures used are discussed. This report includes tables, and illustrations.
Report issued by the Bureau of Mines over studies conducted on mine roof stability. Mining methods to improve roof stability are discussed. This report includes tables, maps, illustrations, and photographs.
Report issued by the Bureau of Mines over the geology of roof-rock stability in coal mines. The distribution, frequency, and magnitude of roof falls in U.S. coal mines are discussed. This report includes maps, illustrations, and photographs.
Report issued by the Bureau of Mines over studies conducted on the outbursts of salt often responsible for fatalities in salt mines. The salt samples were tested for methane content. The test results are discussed. This report includes tables, maps, illustrations, and photographs.
Report issued by the Bureau of Mines over studies conducted on oil-shale deposits of the Piceance Basin. The gas content of the deposits is discussed. This report includes maps, and illustrations.
Report issued by the Bureau of Mines over the reduction of underground mining hazards. Coal bed discontinuities are discussed. This report includes tables, maps, and illustrations.
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