In situ tests of bearing capacity of roof and floor in selected bituminous coal mines :a program report - longwall mining

Author:	Barry, Anthony J.
Additional Authors:	Nair, Oscar B.
Year:	1970
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:7406
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	7406
Subjects:	Mining engineering--United States
	Coal mines and mining--United States
Links:	https://hdl.handle.net/2027/mdp.39015095270107
	https://hdl.handle.net/2027/mdp.39015078533281