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Mining Publication: Use of Strain-Gauged Rock Bolts to Measure Rock Mass Strain During Drift Development
Keywords: Computer simulation Drifts Measures Mine design Strain gauges
This page is archived for historical purposes and is no longer being maintained or updated. Contact NIOSH Mining if you need an accessible version.
Original creation date: June 1999
Authors: JC Johnson, TM Brady, MK Larson, RB Langston, H Kirsten
Conference Paper - June 1999
Download PDF Document (0.25 MB)
NIOSHTIC2 Number: 20028120
Rock Mechanics for Industry, Amadei, Kranz, Scott & Smeallie (eds), 1999 Jun, Balkema, Rotterdam, ISBN 90 5809 052 3; 497-502
An experiment is described in which instrumented rock bolts were used to measure strain in the rock mass during drift development at the Stillwater Mine, Nye, Montana, USA. Two strain-gauged rock bolts were grouted into the middle of the rib next to the face. The drift was excavated in three advances, each one-half drift wide. Strains were recorded hourly by a data logger. Results show that the average change in axial bolt strain for the first and second advance was about the same and that there was almost no change in strain after the third advance. Bending strain was observed 19 cm from the head of the bolt.
Image of publication Use of Strain-Gauged Rock Bolts to Measure Rock Mass Strain During Drift DevelopmentConference Paper - June 1999
Download PDF Document (0.25 MB)
NIOSHTIC2 Number: 20028120
Rock Mechanics for Industry, Amadei, Kranz, Scott & Smeallie (eds), 1999 Jun, Balkema, Rotterdam, ISBN 90 5809 052 3; 497-502
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Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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