Blind pneumatic stowing in voids in abandoned mines

Author:	Sands, Paul F.
Additional Authors:	Boldt, C. M. K., Ruff, T. M.
Year:	1990
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I28.27:9268
Series:	Information circular / Bureau of Mines;
Report Number:	9268
Subjects:	Mine filling
	Compressed air
	Abandoned coal mines
Link:	https://hdl.handle.net/2027/mdp.39015078458158