U.S. flag An official website of the United States government.
Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

i

Failure Analysis of Abutment-Loaded Underground Coal Mine Stoppings During Explosion



Details

  • Personal Author:
  • Description:
    Underground mine structures like mine seals or built-in-place (BIP) refuge alternatives (RA) are exposed to specific loadings like explosions because of overlying and underlying strata conditions. Previous studies worked on the vertical loading response of structures like abutments from panel extraction but not the explosion resistance upon being subjected to these vertical strata loads. In this study, two steel-reinforced concrete wall designs as seal and RA applications are simulated to examine the performance and failure analysis under abutment-loading conditions during an explosion for a coal mine model using dynamic analysis by a distinct element code (3DEC). The available abutment monitoring data by longwall stoppings was used to estimate the abutment-loading conditions. The model setup was calibrated through two validation stages: (1) the concrete wall simulation with the explosion test of steel-reinforced concrete mine seal conducted by previous researchers; and (2) the stress change at the strata by the tailgate convergence-abutment-load multiplier curve. The calibrated models are subjected to various dynamic loadings to simulate explosions. The findings demonstrate that, in addition to magnitude, the pressure versus time mode of loading significantly influences the wall response. Instantaneous loading criteria can provide more cautious measurements to assess how well such walls operate in similar situations. Except for a few cases, the deformations after a single explosion are more pronounced for the effects of subsequent second and third explosions. As a result, the changes in deformation during subsequent explosions are relatively minor compared with the initial permanent deflections. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • ISSN:
    1532-3641
  • Document Type:
    Text
  • Funding:
    Contract
  • Genre:
    Journal Article
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Volume:
    24
  • Issue:
    6
  • NIOSHTIC Number:
    nn:20069521
  • Citation:
    Int J Geomech 2024 Jun; 24(6):04024100
  • Contact Point Address:
    Taghi Sherizadeh, Assistant Professor, Dept. of Mining and Explosives Engineering, 324 McNutt Hall, 1400 N. Bishop Ave., Rolla, MO 65409
  • Email:
    sherizadeh@mst.edu
  • Federal Fiscal Year:
    2024
  • Performing Organization:
    Missouri University of Science and Technology
  • Peer Reviewed:
    True
  • Source Full Name:
    International Journal of Geomechanics
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:4acb05a54ca460c04be76d32d7119b5443ebc024bff1b7c61c0eb143e8e25a9b1c63d8d26077c6c2eab3881a38ae57602aa000770f0e74e19a3c727fae14335f
  • Download URL:
  • File Type:
    Filetype[PDF - 3.98 MB ]
PREVIOUS
ON THIS PAGE
Details
CDC STACKS serves as an archival repository of CDC-published products including scientific findings, journal articles, guidelines, recommendations, or other public health information authored or co-authored by CDC or funded partners.

As a repository, CDC STACKS retains documents in their original published format to ensure public access to scientific information.
BACK TO TOP