Performance Analysis of Instruments Used to Measure Stress Change Resulting from Mining

Details

• Personal Author:
  Kim B-H ; Larson, Mark K.
• Description:
  Researchers at the National Institute for Occupational Safety and Health (NIOSH) have advocated the use of instrumentation in underground mine ground control studies to aid in understanding failure mechanisms and to calibrate numerical models. The purpose of these efforts is to reduce accidents and fatalities in underground mines resulting from inadequate design of mining layout or supports. A recent examination of some results of stress change measurement raised some questions about the validity of elastic solutions in ground, such as coal. Particularly under deep cover as is prevalent in the western United States, the coal around a borehole would likely have yielded so that post-yield behavior would govern the response of the instrument. A numerical experiment was conducted by NIOSH researchers using the FLAC software (Itasca Consulting Group, 2016) to investigate the response of the borehole pressure cell (BPC) and the biaxial stressmeter to varying degrees of plastic behavior. The pre-encapsulated BPC cell pressure exhibits increasing departure from the elastic case with decreasing post-peak-strength slope of the stress-strain curve. On the other hand, because the BSM usually provides much more confinement to the surrounding rock than does the BPC, the measurements obtained from the BSM do not depart significantly from the changes in secondary principal stresses and directions as calculated by the elastic solution. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Safety Software
• Keywords:
  Analytical Instrumentation Boreholes Coal Mines Computer Software Elastic Properties Environmental Stress Failure Analysis Ground Control Mathematical Models Performance Capability Rock Mechanics Stress Analysis Structural Design Structural Failure Underground Mines

  More +
• Series:
  Mining Publications
• ISBN:
  9780873354721
• Publisher:
  Society for Mining, Metallurgy & Exploration, Inc., (SME)
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  Colorado ; OSHA Region 10 ; OSHA Region 3 ; OSHA Region 8 ; Washington ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  SMRD - Spokane Mining Research Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  301-310
• NIOSHTIC Number:
  nn:20059976
• Citation:
  Proceedings of the 38th International Conference on Ground Control in Mining (ICGCM 2019), July 23-25, 2019, Morgantown, West Virginia. Klemetti T, Mishra B, Lawson H, Murphy M, Perry K, eds. Englewood, CO: Society for Mining, Metallurgy & Exploration, Inc., (SME), 2019 Jul; :301-310
• Contact Point Address:
  M. K. Larson, CDC, NIOSH, Spokane, WA, United States
• Editor(s):
  Klemetti T; Mishra B; Lawson H; Murphy M; Perry K
• Federal Fiscal Year:
  2019
• Peer Reviewed:
  False
• Source Full Name:
  Proceedings of the 38th International Conference on Ground Control in Mining (ICGCM 2019), July 23-25, 2019, Morgantown, West Virginia
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:2246efc5042cdb79b0a001757e510032a410ba246eedda73ef5b4ff396050315b8ace699fd8a8bb9c3f6d651ac7df0430f33033418c1b1c6b9bd574c1746621d
• Download URL:
  https://stacks.cdc.gov/view/cdc/215243/cdc_215243_DS1.pdf
• File Type:
  [PDF - 6.98 MB ]