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Blasting practices as they affect the roof of coal mines in Ohio, Pennsylvania, and West Virginia
Earth vibrations caused by mine blasting :progress report 2
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Published Year
1930-1939 (2) *
Subject
Blasting--Safety measures (2) *
Blasting (1)
Blasting--Environmental aspects (1)
Coal mines and mining--Safety measures (1)
Mine explosions (1)
Mine safety (1)
Mine safety--United States (1)
Mines and mineral resources (1)
Author
Geyer, John Nicholas, (1)
Thoenen, J. R. (1)
Windes, S. L. (1)
