Numerical Assessment of the Anisotropic Strengths of a Utah Coal Considering the Spatial Characteristics of Discontinuities Using Discrete Fracture Networks

Details

• Personal Author:
  Kim BH ; Larson, Mark K.
• Description:
  In this study, 3DEC modeling in conjunction with the Discrete Fracture Networks (DFNs) technique was performed to better understand the true anisotropic behavior of the specimens acquired from a bump-prone underground coal mine. The spatial characteristics of the discontinuities (i.e., cleats and bedding planes) as input data for the 3DEC model are estimated based on the results of the laboratory tests and field observations. The DFNs explicitly generated the coal seam that was poorly or well cleated, indicating the different spacing between cleat apertures using the probability distribution functions on fracture density (or frequency) and size. The heterogeneity of the engineering properties (i.e., cohesion and tensile strength) are also considered by Monte Carlo simulations. As a result, the 3DEC model and DFNs technique demonstrated that the results of the simulations agreed well with the results of the laboratory test. These calibrated results can be used as we seek to evaluate bump risk by modeling at field scale. [Description provided by NIOSH]
• Subjects:
  Geology Mining Occupational Health Safety
• Keywords:
  Anisotropy Coal Mines Coal Seams Geologic Models Geophysics Models Rock Mechanics Underground Mines
• Series:
  Mining Publications
• Publisher:
  American Rock Mechanics Association (ARMA)
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  OSHA Region 10 ; OSHA Region 6 ; Texas ; 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:20062913
• Citation:
  55th US Rock Mechanics/Geomechanics Symposium, June 18-25, 2021, Houston, Texas, virtual event. Alexandria, VA: American Rock Mechanics Association (ARMA), 2021 Jun; :ARMA-2021-0016
• Federal Fiscal Year:
  2021
• NORA Priority Area:
  Mining
• Peer Reviewed:
  False
• Source Full Name:
  55th US Rock Mechanics/Geomechanics Symposium, June 18-25, 2021, Houston, Texas, virtual event
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:e2b0498426fd36b562d491553e317ca5e927034f83caf5be888845e067b4064cc87d126fc584a5b154cf8a7e9df01792cb8515044d805db285573d4a1c9afe53
• Download URL:
  https://stacks.cdc.gov/view/cdc/215439/cdc_215439_DS1.pdf
• File Type:
  [PDF - 1.07 MB ]