Effects of horizontal stress related to stream valleys on the stability of coal mine openings

Additional Authors:	Oyler, D. C., Heasley, K. A., Jones, J. R., Molinda, G. M.
Year:	1992
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.22:9413
Series:	Report of investigations / Bureau of Mines ;
Report Number:	9413
Subjects:	Rock bursts
	Mine roof control
	Coal mines and mining--West Virginia
	Coal mines and mining--Pennsylvania
	Valleys
Links:	no.9413 1992
	https://hdl.handle.net/2027/mdp.39015077558776