Assessment of Floor Heave Associated with Bumps in a Longwall Mine Using the Discrete Element Method

Details

• Personal Author:
  Kim BH ; Larson, Mark K.
• Description:
  The floor-heave and no-floor-heave phenomena at a western U.S. coal mine could not be properly simulated in numerical models using conventional shear-dominant failure criteria. Although the previous numerical study using FLAC3D very reasonably demonstrated these phenomena, 3DEC modeling in conjunction with the discrete fracture network (DFN) technique was performed to better understand the true behavior of floor heave associated with underground mining in an anisotropic stress field. As a result, the latter models predicted floor heave that agreed with relative amounts of observed heave from each gateroad system, but the cause of heave was mainly related to the degree of anisotropy instead of the size of the pillar. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Geology Mining Occupational Health Safety Software
• Keywords:
  3DEC Author Keywords: Coal Mine Coal Mining Computer Models DFN Discrete Fracture Network Floor Heave Geologic Models Ground Control Ground Monitoring Longwall Mining Pillar Mechanics Rock Mechanics Underground Mines

  More +
• Series:
  Mining Publications
• ISSN:
  0026-5187
• Document Type:
  Text
• Genre:
  Abstract or Summary
• Place as Subject:
  OSHA Region 10 ; Washington
• 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:
  54-55
• Volume:
  74
• Issue:
  9
• NIOSHTIC Number:
  nn:20066047
• Citation:
  Min Eng 2022 Sep; 74(9):54-55
• Email:
  Bkim2@cdc.gov
• Federal Fiscal Year:
  2022
• NORA Priority Area:
  Mining
• Peer Reviewed:
  True
• Source Full Name:
  Mining Engineering
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:d74e0e2f66df540447fc765b99db1d2cd723ad690baae88067cec04fdf9b671d15a51e221f3d46953a3b32883b946df369ef9937ef15a2a83356c4fdd082b7c2
• Download URL:
  https://stacks.cdc.gov/view/cdc/215565/cdc_215565_DS1.pdf
• File Type:
  [PDF - 653.00 KB ]