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Strength Characteristics of Highly Anisotropic Burst-Prone Coal Considering Mineralogical Composition

Public Domain


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  • Personal Author:
  • Description:
    This paper was developed as part of an effort by the National Institute for Occupational Safety and Health (NIOSH) to identify risk factors associated with bursts/bumps in the prevention of fatalities and accidents in highly stressed, burst- or bump-prone ground conditions.In this study, we evaluated the effects of different shapes and distribution densities of mineral grains in coal on failure mechanics using the numerical software 3DEC.The main aim of this study was to identify possible failure mechanisms influenced by mineral habit and frequency in coal.Exploring differences in failure mechanics associated with the mineral grains helped to determine the role of mineral character as a possible contributor to characterize burst-prone coals.To achieve the goal of this study, a series of numerical specimens were prepared in the 3DEC model as follows: first, the 3DEC modeling in conjunction with the DFNs (Discrete Fracture Networks) technique was performed to explicitly generate the discontinuities (i.e., cleats and bedding planes) in the numerical specimens based on the results of laboratory analyses.Then, the different realizations of mineral grains were embedded in the 3DEC model to simulate an unconfined compressive strength (UCS) test to assess the influence of the mineralogical characteristics on the UCS. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • Series:
    Mining Publications
  • ISBN:
    9780979497599
  • Publisher:
    American Rock Mechanics Association (ARMA)
  • Document Type:
    Text
  • Genre:
    Proceedings
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Division:
    SMRD - Spokane Mining Research Division
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • NIOSHTIC Number:
    nn:20070428
  • Citation:
    58th US Rock Mechanics/Geomechanics Symposium, June 23-26, 2024, Golden, Colorado. Alexandria, VA: American Rock Mechanics Association (ARMA), 2024 Jun; :ARMA-24-0019
  • Federal Fiscal Year:
    2024
  • Peer Reviewed:
    False
  • Source Full Name:
    58th US Rock Mechanics/Geomechanics Symposium, June 23-26, 2024, Golden, Colorado
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:e31ae87d6b583f78542481ecee6a01a5679b8ae9c9c24fbb496e413305a38ab7b2dbcfd93f53190774ce8d0d2f08c8b23f6df52f0649e7cefbaa332952385270
  • Download URL:
  • File Type:
    Filetype[PDF - 1.62 MB ]
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