Longwall gate road roof instability and methods of control in the lower Kittanning Coalbed of Central Pennsylvania
By: by E.R. Bauer, J.M. Listak, and E.D. Krupa.
Contributors: Listak, Jeffrey M.; Krupa, E. D.
Series: Information circular ;; 9331; Information circular (United States. Bureau of Mines) ;; 9331.
Publisher: U.S. Dept. of the Interior, Bureau of Mines
Published: 1992
Place of publication: Washington, D.C
Language: eng
Number of pages: 20
Subjects: Mine roof control -- Testing.; Longwall mining -- Pennsylvania -- Cambria County.; Gate roads (Mining) -- Pennsylvania -- Cambria County.
Notes: Includes bibliographical references (p. 16-17).