Experimental Investigation of Time-Dependent Deformation in Brittle Marcellus Shale

Details

• Personal Author:
  Gupta, Kailash ; Mishra B
• Description:
  Coal mining activity disturbs the natural equilibrium of in situ stress state such that the induced stresses deform the surrounding rock mass. Although the installation of roof supports typically prevents rock deformation, rock mass failure may still occur in bolted roof. The erratic failure of rock mass after few days to months and years of excavation is the result of time-dependent deformation of roof rock under constant surrounding stresses. In the current research, the triaxial laboratory creep experiments proved that Marcellus shale exhibits time-dependent deformation under constant stress that was smaller than the failure strength. However, unlike conventional experimental results, the time-dependent deformation did not depend on the level of constant stress. The often-neglected initial state of specimens and intrinsic heterogeneity highly influenced the time-dependent failure of Marcellus shale. Description provided by NIOSH
• Subjects:
  • Coal
  • Coal Mining
  • Mining
  • Occupational Health
  • Safety
• Keywords:
  • Coal mining
  • Stress
  • Ground stability
  • Rock mechanics
  • Roof supports
  • Roof bolts
  • Author Keywords: Underground coal mines
  • Marcellus shale
  • Triaxial stress
  • Time-dependent deformation
• ISSN:
  2524-3462
• Document Type:
  Text
• Funding:
  Contract
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  38
• Issue:
  5
• NIOSHTIC Number:
  nn:20063520
• Citation:
  Min Metall Explor 2021 Oct; 38(5):1943-1953
• Contact Point Address:
  Brijes Mishra, Department of Mining Engineering, West Virginia University, Morgantown, WV
• Email:
  brijes.mishra@mail.wvu.edu
• Federal Fiscal Year:
  2022
• Performing Organization:
  West Virginia University
• Peer Reviewed:
  True
• Start Date:
  20160914
• Source Full Name:
  Mining, Metallurgy & Exploration
• End Date:
  20200831
• Download URL:
  https://stacks.cdc.gov/view/cdc/222110/cdc_222110_DS1.pdf
• File Type:
  [PDF - 4.19 MB]
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:7b96a03912119302d1dc8add6959771d9f7d6e4fef17506da8ec42ca747a715a848aef9c5383d4472a26517c2560f03bf725d1c3a4123f973536992e6c03fcc8