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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

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)

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