Cost comparison of gob hole and cross-measure borehole systems to control methane in gobs

Author:	Baker, E. C.
Additional Authors:	Cervik, Joseph., Garcia, F.
Year:	1988
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:9151
Series:	Report of investigations / Bureau of Mines ;
Report Number:	9151
Subjects:	Longwall mining
	Coalbed methane drainage
	Boring
Link:	https://hdl.handle.net/2027/mdp.39015078472530