Performance of a novel bump control pillar extracting technique during room-and-pillar retreat coal mining
By: by Alan A. Campoli, David C. Oyler, and Frank E. Chase.
Contributors: Oyler, David C.; Chase, Frank E.
Series: Report of investigations ;; 9240; Report of investigations (United States. Bureau of Mines) ;; 9240.
Publisher: U.S. Dept. of the Interior, Bureau of Mines
Published: 1989
Place of publication: Washington, D.C. (2401 E St., N.W., Washington 20241)
Language: eng
Number of pages: 40
Subjects: Pillaring (Mining); Coal mines and mining -- West Virginia -- McDowell County.
Notes: Bibliography: p. 38.