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Methods of development and pillar extraction in mining the Pittsburgh coal bed in Pennsylvania, West Virginia, and Ohio

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

• 1930-1939 (1)
• 1940-1949 (1)
• 1970-1979 (1)

Subject

• Coal mines and mining--Pennsylvania (3) *
• Mining engineering (3) *
• Subsidences (Earth movements) (2)
• Anthracite coal--Pennsylvania (1)
• Coal mines and mining--Ohio (1)
• Coal mines and mining--West Virginia (1)

Author

• Ash, S. H. (1)
• Cochran, William, (1)
• Paul, J. W. (1)
• Plein, Leopold Nicholas, (1)
• Westfield, James. (1)

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