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Analysis of Rib Bolt Load and Its Impact on Stabilizing Coal Pillar Ribs Using Numerical Simulations

Public Domain


Details

  • Personal Author:
  • Description:
    Rib control is a critical component of underground coal mining operations, and comprehensive rib support design is essential for ensuring the safety of miners. However, there is currently no standardized approach for rib support design in the United States. To tackle this issue, the National Institute for Occupational Safety and Health (NIOSH) has developed a standalone application, Design of Rib Support (DORS), for rib stability assessment and rib support design under development load. The rib support design in DORS starts with the rib support density, which is determined from the unsupported rib factor of safety (RibFOS). The relationship between rib support density and unsupported RibFOS was obtained from the collected field data. The objective of this research is to validate DORS rib support design by analyzing the extent to which the proposed design capability was utilized to support the coal ribs using numerical simulations. A series of numerical models with varying overburden depth and rib height were built and the ribs were supported with the DORS-recommended rib support design. The bolt load was analyzed under different conditions and the results show that bolt load varies with the overburden depth, the location of the bolt and bolt length. The load in the bolt(s) increases with the reduction in unsupported RibFOS. The bolt(s) start to yield when the unsupported RibFOS falls below a threshold value of 0.8 and secondary support is necessary. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • Series:
    Mining Publications
  • ISBN:
    97808733551
  • Publisher:
    Society for Mining, Metallurgy & Exploration (SME)
  • Document Type:
    Text
  • Genre:
    Proceedings
  • Place as Subject:
  • 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:
    323-331
  • NIOSHTIC Number:
    nn:20070531
  • Citation:
    Proceedings of the 43rd International Conference on Ground Control in Mining (ICGCM 2024), July 22-25, 2024, Canonsburg, Pennsylvania. Klemetti T, Mitra R, Perry K, Murphy M, Tulu IB, eds. Englewood, CO: Society for Mining, Metallurgy & Exploration (SME), 2024 Jul; :323-331
  • Editor(s):
    Klemetti T; Mitra R; Perry K; Murphy M; Tulu IB
  • Federal Fiscal Year:
    2024
  • Peer Reviewed:
    False
  • Source Full Name:
    Proceedings of the 43rd International Conference on Ground Control in Mining (ICGCM 2024), July 22-25, 2024, Canonsburg, Pennsylvania
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:78a2a76f52434fae44d59452db0b5d359cb386c4c440ac440ea986bad3c9a643bce7f4e936569699be381ee256f810ac9adf4803b1d5b49e0ba186c4cb01a07d
  • Download URL:
  • File Type:
    Filetype[PDF - 1.53 MB ]
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