Skip directly to search Skip directly to A to Z list Skip directly to navigation Skip directly to page options Skip directly to site content

Mining Publication: Use of Strain-Gauged Rock Bolts to Measure Rock Mass Strain During Drift Development

NOTE: 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

Image of publication Use of Strain-Gauged Rock Bolts to Measure Rock Mass Strain During Drift Development

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.

Authors: JC Johnson, TM Brady, MK Larson, RB Langston, H Kirsten

Conference Paper - June 1999

NIOSHTIC2 Number: 20028120

Rock Mechanics for Industry, Amadei, Kranz, Scott & Smeallie (eds), 1999 Jun, Balkema, Rotterdam, ISBN 90 5809 052 3; 497-502


TOP