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The Pumpable Rock Bolt: A New Roof Control Concept.
Habberstad-JL; Waide-C; Simpson-R
Eng and Min J 1973 Aug; 174(8):76-79
A new pumpable fully grouted polymer roof bolt that achieves several advantages over grouted steel and conventional expansion shell bolts is being developed by the Bureau of Mines' Spokane Mining Research Center.
Issue of Publication
Eng. and Min. J., V. 174, No. 8, August 1973, PP. 76-79
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division