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    Measuring roof-bolt response to axial and shear stresses: Laboratory and first in-situ analyses

    Access Status
    Fulltext not available
    Authors
    Jessu, Kashi Vishwanath
    Kostecki, T.
    Spearing, Sam
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Jessu, K.V. and Kostecki, T. and Spearing, S. 2016. Measuring roof-bolt response to axial and shear stresses: Laboratory and first in-situ analyses. The CIM Journal. 7 (1): pp. 62-70.
    Source Title
    The CIM Journal
    DOI
    10.15834/cimj.2016.7
    ISSN
    1923-6026
    School
    Dept of Mining Eng & Metallurgical Eng
    URI
    http://hdl.handle.net/20.500.11937/53443
    Collection
    • Curtin Research Publications
    Abstract

    Roof bolts are subjected to axial stresses, shear stresses, or both. Axial and shear stresses were compared between roof bolts machined with two and three slots. Shear stresses perpendicular to and at an angle to the shear planes were evaluated by analyzing a three-slot instrumented roof bolt, performing laboratory tests on two- and three-slot roof bolts, and conducting in-situ test analyses. Three-slot bolts appear to provide a complete bending strain profile, requiring no prior knowledge of the estimated shear-plane orientation. Minimum displacements occur in roof bolts installed perpendicular to rather than at an angle to the shear planes.

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