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

by A. A. Campoli

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• 38 Currently reading

Published 1989 by U.S. Dept. of the Interior, Bureau of Mines in Washington, D.C. (2401 E St., N.W., Washington 20241) .
Written in

Places:

• West Virginia,
• McDowell County.
Subjects:

• Pillaring (Mining),
• Coal mines and mining -- West Virginia -- McDowell County.

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Edition Notes

Bibliography: p. 38.

Statement	by Alan A. Campoli, David C. Oyler, and Frank E. Chase.
Series	Report of investigations ;, 9240, Report of investigations (United States. Bureau of Mines) ;, 9240.
Contributions	Oyler, David C., Chase, Frank E.
Classifications
LC Classifications	TN23 .U43 no. 9240, TN292 .U43 no. 9240
The Physical Object
Pagination	ii, 40 p. :
Number of Pages	40
ID Numbers
Open Library	OL2147959M
LC Control Number	88600453

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