Borehole deformation gage for determining the stress in mine rock

Author:	Obert, Leonard,
Additional Authors:	Morgan, Thomas A., Merrill, Robert H.
Year:	1962
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:5978
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	5978
Subjects:	Rock pressure
	Rock mechanics--Measurement--Equipment and supplies
Link:	https://hdl.handle.net/2027/mdp.39015078536912