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 (United States. Bureau of Mines) -- 9240.
Publisher: Dept. of the Interior
Published: 1989
Place of publication: Washington, DC
Language: eng
Number of pages: 40
Subjects: Pillaring (Mining); Coal mines and mining -- West Virginia -- McDowell County
Notes:  88600453  t_oclc

Bibliogr.

11