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A platform for research: civil engineering, architecture and urbanism
Study of mine roof of Pittsburgh coal bed in Pittsburgh mining district
Results of study in two areas, to determine to what extent methods of mining, roof support, and regulations and practices respecting timbering influence occurrence of falls of roof and coal, which result in injury or death of underground workmen, and to call attention to methods and practices that promote prevention of injury and death from falls of material from roof or sides of mines.
Study of mine roof of Pittsburgh coal bed in Pittsburgh mining district
Results of study in two areas, to determine to what extent methods of mining, roof support, and regulations and practices respecting timbering influence occurrence of falls of roof and coal, which result in injury or death of underground workmen, and to call attention to methods and practices that promote prevention of injury and death from falls of material from roof or sides of mines.
Study of mine roof of Pittsburgh coal bed in Pittsburgh mining district
U S Bur Mines -- Tech Paper
Paul, J.W. (author) / Plein, L.N. (author)
1932
98 pages
Report
English
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