Calibration of a Coal-Mass Model Using an In Situ Coal Pillar Strength Study

Details

• Personal Author:
  Mohamed KM ; Rashed G ; Rusnak, John A. ; Sears MM ; Van Dyke MA
• Description:
  Researchers from the National Institute for Occupational Safety and Health (NIOSH) recently developed a coal-mass model to realistically simulate the deformation and loading behaviors of the ribs of coal pillars in underground coal mines. The scale-dependent properties (stiffness and strength) of coal material were considered in the coal-mass model. In this paper the orientation of face cleat with respect to driving direction was integrated in the coal-mass model. The controlling parameters (dimensionless coal-mass scale and fracture strains) of the modified coal-mass model were calibrated using a published case study of coal pillar strength. Numerical models with wide ranges of controlling parameters were conducted to simulate the test pillar. The best match between the numerical modeling results and the measured stresses and deformations was achieved by using a coal-mass scale of 30 and fracture plastic shear and tensile strains of 3.25% and 0.325 %, respectively. [Description provided by NIOSH]
• Subjects:
  Mining Mortality Occupational Health Safety
• Keywords:
  Coal Mines Fatalities Ground Falls Hazards Models Pillar Mechanics Rock Mechanics Roof Supports Roof Support Systems Underground Mines Underground Mining

  More +
• Series:
  Mining Publications
• Publisher:
  Society for Mining, Metallurgy, and Exploration, Inc.
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  Colorado ; Minnesota ; OSHA Region 3 ; OSHA Region 5 ; OSHA Region 8 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PMRD - Pittsburgh Mining Research Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-7
• NIOSHTIC Number:
  nn:20051357
• Citation:
  2018 SME Annual Meeting, February 25-28, 2018, Minneapolis, Minnesota, preprint 18-075. Englewood, CO: Society for Mining, Metallurgy, and Exploration, Inc., 2018 Feb; :1-7
• Contact Point Address:
  K. M. Mohamed, NIOSH, Pittsburgh, PA
• Federal Fiscal Year:
  2018
• NORA Priority Area:
  Mining
• Peer Reviewed:
  False
• Source Full Name:
  2018 SME Annual Meeting, February 25-28, 2018, Minneapolis, Minnesota, preprint 18-075
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:80445be44df36b654d7740bd22a790ae7840b0342f3b8df3b328eb0bddd5d294c7db744bffd9d5adb6c0273e4c94db0c67fd07fb96d045eeb43c98f475b9e6ad
• Download URL:
  https://stacks.cdc.gov/view/cdc/227664/cdc_227664_DS1.pdf
• File Type:
  [PDF - 655.56 KB ]