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Anthracite mechanical mining investigations.

Anthracite mechanical-mining investigations :use of yielding steel supports (props) in combination with backfilling for mining thick, flat beds

Published Year

• 1950-1959 (2) *

Subject

• Anthracite coal industry (2)
• Coal-mining machinery (2)

Author

• Hartley, John C. (2) *
• Brennan, Robert J. (1)
• Buch, John W. (1)
• Cooner, John D. (1)
• Landsidle, Clayton A. (1)

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