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Blasting practices as they affect the roof of coal mines in Ohio, Pennsylvania, and West Virginia

Firing delay characteristics of instantaneous and seismic detonators

Short-delay blasting in underground coal mines

Published Year

• 1930-1939 (1)
• 1980-1989 (2)

Subject

• Blasting--Safety measures (3) *
• Coal mines and mining--Safety measures (3) *
• Bituminous coal (1)
• Electric detonators--Safety measures (1)

Author

• Mainiero, Richard J. (2)
• Bajpayee, T. S. (1)
• Geyer, John Nicholas, (1)
• Hay, J. Edmund. (1)
• Verakis, Harry C., (1)

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