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Backfilling problem in the anthracite region as it relates to conservation of anthracite and prevention of subsidence

Mine subsidence--extent and cost of control in a selected area.

Published Year

• 1940-1949 (1)
• 1970-1979 (1)

Subject

• Coal mines and mining--Pennsylvania (2) *
• Mining engineering (2) *
• Subsidences (Earth movements) (2) *
• Anthracite coal--Pennsylvania (1)

Author

• Ash, S. H. (1)
• Cochran, William, (1)
• Westfield, James. (1)

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