Stiffness characteristics of longwall shields
By: by Thomas M. Barczak and David E. Schwemmer.
Contributors: Schwemmer, David E.
Series: Report of investigations / United States Department of the Interior, Bureau of Mines ;; 9154; Report of investigations (United States. Bureau of Mines) ;; 9154.
Publisher: U.S. Dept. of the Interior, Bureau of Mines
Published: 1988
Place of publication: [Washington, D.C.]
Language: eng
Number of pages: 14
Subjects: Longwall mining.; Mine roof control.