Exploring the Deformation Mechanics of Coal Ribs Using the Distinct Element Modeling Approach

Details

• Personal Author:
  Sherizadeh T ; Sunkpal M ; Sherizadeh T ; Sunkpal M
• Description:
  Understanding coal rib geomechanics is essential for improving rib stability and eliminating fatality and injury trends due to rib failures. There are presently no standardized rib control practices available in most countries. In light of this observed dearth, this investigation aims to improve understanding of rib failure mechanisms using the distinct element modeling (DEM) technique. DEM is chosen because of its superior advantage to explicitly represent discontinuities and their constitutive behaviors, besides that of the intact rock matrix. To analyze the rib stability, a numerical monitoring protocol is implemented to monitor the deformation characteristics of the coal rock mass as its strength is gradually reduced and the deformation and safety factors are established. A number of scenarios were considered in the modeling process, including a non-cleated rib, a cleated rib, and the interaction between support and coal mass. The main conclusions drawn from the study were that the rib failure process initiated with tensile and shear cracks which coalesced to form predominantly sub-parallel tensile fractures to the rib line; and joints and defects in the rib limit fracture development and propagation. The depth of fracture was found to be approx. 1.14 m for the cleated rib and approx. 1.40 m for the non-cleated rib. The depth of softening (DOS) for the cleated and non-cleated ribs was approx. 1.80 m and approx. 1.60 m, respectively. Also, the results demonstrated the capability of DEM-based bonded block models (BBM) in explicitly capturing the rock and support interactions which makes this solution to be suitable for investigating coal rib stability and support requirements. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Safety
• Keywords:
  Author Keywords: Assessing Support Requirement Coal Mines Coal Rib Geomechanics Coal Rib Stability Depth Of Softening Distinct Element Modeling Failure Analysis Geologic Models Geotechnical Engineering Mining Industry Rock Mechanics Roof Supports

  More +
• ISSN:
  0723-2632
• Document Type:
  Text
• Funding:
  Contract
• Genre:
  Journal Article ; Journal Article
• Place as Subject:
  Missouri ; OSHA Region 7
• CIO:
  National Institute for Occupational Safety and Health (NIOSH) ; National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health ; Workplace Safety & Health
• Location:
  North America ; North America
• Volume:
  55
• Issue:
  5
• NIOSHTIC Number:
  nn:20068048
• Citation:
  Rock Mech Rock Eng 2022 May; 55(5):2879-2898
• Contact Point Address:
  Taghi Sherizadeh, Missouri University of Science and Technology, Rolla, MO, USA
• Email:
  sherizadeh@mst.edu
• Federal Fiscal Year:
  2022
• Performing Organization:
  Missouri University of Science & Technology
• Peer Reviewed:
  True
• Start Date:
  20200901
• Source Full Name:
  Rock Mechanics and Rock Engineering
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:a4f8b3f7c8e8547fa0167a8d3f5cd0a2fd2c49aacfc753ff5ffe85a60c476d5eff95da926ce7bc55028f706cd031d1d3136e118e4caee065f3a25ba9f0bc6f50
• Download URL:
  https://stacks.cdc.gov/view/cdc/230269/cdc_230269_DS1.pdf
• File Type:
  [PDF - 5.19 MB ]