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Performance of a novel bump control pillar extracting technique during room-and-pillar retreat coal mining

Published Year

• 1980-1989 (1)

Subject

• Coal mines and mining--West Virginia--McDowell County (1)
• Pillaring (Mining) (1) *

Author

• Campoli, A. A. (1)
• Chase, Frank E. (1)
• Oyler, David C. (1) *

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