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Investigation of longwall gateroad roof support characteristics of Powhatan no. 4 mine : instrumentation plan / by G.J. Chekan, D.R. Babich.

By: Chekan, G. J. (Gregory J.).
Contributor(s): Babich, D. R | United States. Bureau of Mines.
Material type: materialTypeLabelBookSeries: United States Bureau of Mines. Report of investigations 8628. Publisher: Pgh. [i.e. Pittsburgh], Pa. : U.S. Dept. of the Interior, Bureau of Mines, 1982Description: 9 p. : ill. ; 28 cm.Report number: USBM ri-8628Subject(s): Caving mining -- Safety measures | Ground control (Mining) | Ground support (Mining) | Coal mines and mining -- Safety measures
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