Results 1 - 7 of 7

• Bolt Load Changes During Initial Face Advance and Cross-Cut Breakthrough
  8/1/2004 - Conference papers
  The San Juan Mine and the National Institute for Occupational Safety and Health conducted a study to measure how development mining affected bolt loads.
• Evaluation of Instrumented Cable Bolts in Cement Grout to Determine Physical and Numerical Modeling Properties
  4/1/2004 - Reports of Investigations
  NIOSH researchers at the Spokane Research Laboratory in Spokane, WA, are investigating the physical properties of cable bolts by replacing the conventional king wire with a modified king wire on which strain gauges have been installed.
• Determination of In Situ Deformation Modulus for Cemented Rockfill
  9/1/2003 - Conference papers
  As part of safety and stability studies at three underground mines in the United States, researchers installed earth pressure cells and embedment strain gauges in cemented rockfill to measure stress and strain changes as mining progressed and the rockfi...
• New Tools for Roof Support Evaluation and Design
  8/1/2003 - Conference papers
  This paper describes two tools NIOSH developed. The miniature data acquisition system (MIDAS) could make geotechnical instruments in underground mines more feasible. The rock strain strip, together with MIDAS, more accurately measures rock movement.
• Determination of Physical Properties of Cable Bolts in Cement Grout Pull Tests Using Instrumented King Wires
  4/1/2000 - Conference papers
  Researchers are investigating the physical properties of cable bolts by replacing the conventional king wire with a modified king wire on which strain gauges have been installed.
• Use of Strain-Gauged Rock Bolts to Measure Rock Mass Strain During Drift Development
  6/1/1999 - Conference papers
  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.
• Technology News 476 - Instrumented King Wire for Monitoring Cable Bolts
  11/1/1998 - Technology News
  Development of methods and tools to assist in the evaluation and selection of rock supports could reduce the number of unplanned rock falls significantly.