Investigation of the effects of thrust and hardened washers on the installed tension of a roof bolt /

Bibliographic Details

Main Authors:	Sawyer, Stephen Gerard, Karabin, George J. (Author), Debevec, William J. (Author)
Corporate Author:	United States. Mining Enforcement and Safety Administration
Format:	Government Document Book
Language:	English
Published:	[Washington] : U.S. Dept. of the Interior, Mining Enforcement and Safety Administration, [1976]
Series:	Informational report (United States. Mining Enforcement and Safety Administration) ; 1031.
Subjects:	Mine roof bolting. Washers (Fasteners)