Canopy and base load distribution on a longwall shield
By: by Thomas M. Barczak and David F. Gearhart.
Contributors: Gearhart, David F.
Series: Report of investigations ;; 9418; Report of investigations (United States. Bureau of Mines) ;; 9418
Publisher: U.S. Dept. of the Interior, Bureau of Mines
Published: 1992
Place of publication: Washington, D.C
Language: eng
Number of pages: 23
Subjects: Mine roof control.; Dead loads (Mechanics); Longwall mining.
Notes: Supt. of Docs. no.: I28.23:9418