Ground Support Design Curves: Squeezing Ground in Nevada

Details

• Personal Author:
  Barnard CK ; Martin LA ; Pakalnis, Rimas T. ; Raffaldi MJ ; Warren SN
• Description:
  Researchers at Spokane Mining Research Division of the National Institute for Occupational Safety and Health (NIOSH) are working with mine personnel to aid in providing a safe working environment through the development of empirical ground support design tools. Weak rock mass conditions at underground gold mines in Nevada, which can result in hazardous mining conditions, pose challenges to installing an appropriate amount of ground support. The design of ground support based on dead-weight roof failure is commonplace and appropriate in preventing catastrophic collapse; however, these methods are not particularly effective at predicting the required support capacity to withstand overstressed, squeezing ground. This paper presents empirically derived ground support guidelines for squeezing ground conditions in familiar terms of a factor of safety (FOS) against dead-weight failure versus Rock Mass Rating (RMR). These guidelines are intended to aid the engineer in the design of ground support capacity appropriate to the rockmass conditions and intended use of the excavation, thereby improving safety in underground mines. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Quality Control Safety
• Keywords:
  Environmental Stress Failure Analysis Geotechnical Engineering Gold Mines Ground Control Ground Falls Ground Stability Guidelines Horizontal Stress Materials Testing Metal Mining Mining Engineering Quality Control Rock Bolts Rock Mechanics Roof Supports Roof Support Systems Structural Analysis Structural Design Structural Engineering Structural Failure Underground Mines Weight Factors

  More +
• Series:
  Mining Publications
• Publisher:
  American Rock Mechanics Association (ARMA)
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  Nevada ; OSHA Region 10 ; OSHA Region 9 ; Washington
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  SMRD - Spokane Mining Research Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• NIOSHTIC Number:
  nn:20053066
• Citation:
  52nd US Rock Mechanics/Geomechanics Symposium, June 17-20, 2018, Seattle, Washington. Alexandria, VA: American Rock Mechanics Association (ARMA), 2018 Jun; :ARMA 18-750
• Contact Point Address:
  S. N. Warren, National Institute for Occupational Safety and Health, Spokane, WA, USA
• CAS Registry Number:
  Gold (CAS RN 7440-57-5)
• Federal Fiscal Year:
  2018
• NORA Priority Area:
  Mining
• Peer Reviewed:
  False
• Source Full Name:
  52nd US Rock Mechanics/Geomechanics Symposium, June 17-20, 2018, Seattle, Washington
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:3bd592c8603548508dec6ab6312eff6d71d4893540f80cb0e6c696d6fd92335a607a0078e92725771b9aa4716dbc47d6a359983580bf5a2872a2581d08aa68ea
• Download URL:
  https://stacks.cdc.gov/view/cdc/227734/cdc_227734_DS1.pdf
• File Type:
  [PDF - 1.75 MB ]