Roof control strategies for underground coal mines

Author:	Smith, W. C.
Year:	1993
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
Series:	Information circular ;
Report Number:	9351
Subjects:	Coal mines and mining
	Mine roof bolting
	Mine roof control
	Mines et ressources mini©Łeres
	Charbon--Mines et extraction
	Mines de charbon
Link:	https://hdl.handle.net/2027/mdp.39015086486274