Quantifying the Benefit of Cable Bolts as Supplementary Support in Coal Mines Using the Strength Reduction Method

Details

• Personal Author:
  Esterhuizen, Gabriel S. ; Murphy MM
• Description:
  The National Institute for Occupational Safety and Health has recently implemented the strength reduction method to evaluate coal mine entry stability in FLAC3D. The method can evaluate the performance of a support system and calculate a stability factor for the entry. For this paper, two studies were analyzed to quantify the impact that cable bolts have on the stability of the entry. The first study investigated the impact of replacing fully grouted bolts with cable bolts for a variety of mining conditions. The strength reduction method was useful for quantifying the additional stability provided by the cable bolts for the mining conditions evaluated. The results were validated with case histories from the Analysis of Roof Bolt Systems (ARBS) database. The second study investigated the benefit of using an angled cable bolt with a steel strap. It was found that with a strap, the cable bolts are better utilized to provide stability. The study also found that the capacity of the cable bolt was not sufficient to provide adequate roof support when used with thicker roof straps. The strength reduction method was useful in quantifying the effectiveness of the cable bolts and determining the weakest link in the support system. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Environmental Monitoring Mining Occupational Health Safety
• Keywords:
  Cables Coal-mining Environmental-control-equipment Equipment-reliability Ground-control Ground-stability Mining-equipment Mining-industry Quantitative-analysis Rock-falls Rock-mechanics Structural-analysis

  More +
• Series:
  Mining Publications
• ISBN:
  9781629931180
• Publisher:
  American Rock Mechanics Association (ARMA)
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  California ; OSHA Region 3 ; OSHA Region 9 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  OMSHR - Office of Mine Safety and Health Research
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  426-437
• Volume:
  1
• NIOSHTIC Number:
  nn:20043699
• Citation:
  47th US Rock Mechanics/Geomechanics Symposium, June 23-26, 2013, San Francisco, California. Alexandria, VA: American Rock Mechanics Association (ARMA), paper no. ARMA-2013-143, 2013 Jun; 1:426-437
• Contact Point Address:
  M. M. Murphy, Office of Mine Safety and Health Research, National Institute for Occupational Safety and Health, Pittsburgh, PA, USA
• Federal Fiscal Year:
  2013
• NORA Priority Area:
  Mining
• Peer Reviewed:
  False
• Source Full Name:
  47th US Rock Mechanics/Geomechanics Symposium, June 23-26, 2013, San Francisco, California
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:379997d36221594d7b3c585fe6f2d5b531bf0030fc15cc8b220f0a10cc18c99b74a69c751c23a7db5343588f75ad917e9d01f5a2fd1e5b21401978034767e292
• Download URL:
  https://stacks.cdc.gov/view/cdc/228026/cdc_228026_DS1.pdf
• File Type:
  [PDF - 1.15 MB ]