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Introduction to Rock Strength Borehole Probe (RSBP) for Estimation of Rock Strength in Roofbolt Drill Holes



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  • Personal Author:
  • Description:
    Improving the safety of underground openings and optimizing ground support systems requires reliable ground characterization. This includes understanding the joints, discontinuities, and rock strength. Joint information can be obtained from borehole cameras, but measuring in-situ rock strength is very difficult. Use of borehole probes can be an ideal and efficient way to meet this requirement. This paper discusses the development of the Rock Strength Borehole Probe (RSBP) and presents the preliminary laboratory/field test. This device can be an accurate, flexible, quick, non-disruptive, and cost-effective alternative to estimate the rock strength inside boreholes in underground mines and tunnels. In addition, the scratch testing procedure in the laboratory by means of a newly developed miniature linear cutting machine is explained. Based on the results of these tests, two equations are developed to estimate the uniaxial compressive strength (UCS) and Brazilian tensile strength (BTS) of the sedimentary/metamorphic rocks. These equations, are based on testing 27 different sedimentary, igneous, and metamorphic rocks by full-scale scratch tests, including the cutting tests by a miniature disc. The results show a good correlation between the normal force and the compressive strength of sedimentary rock if the depth of the scratch is known. No significant correlation was observed for igneous rocks, due to the impacts of grain size. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • ISBN:
    9781510860292
  • Publisher:
    West Virginia University
  • Document Type:
    Text
  • Funding:
    Contract
  • Genre:
    Proceedings
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Pages in Document:
    192-198
  • NIOSHTIC Number:
    nn:20068862
  • Citation:
    Proceedings of the 35th International Conference on Ground Control in Mining, July 26-28, 2016, Morgantown, West Virginia. Barczak TM, Peng SS, Schmidt D, Tadolini S, Thompson M, eds. Morgantown, WV: West Virginia University, 2016 Jul; :192-198
  • Editor(s):
    Barczak TM; Peng SS; Schmidt D; Tadolini S; Thompson M
  • Federal Fiscal Year:
    2016
  • Performing Organization:
    Pennsylvania State University
  • Peer Reviewed:
    False
  • Start Date:
    20110929
  • Source Full Name:
    Proceedings of the 35th International Conference on Ground Control in Mining, July 26-28, 2016, Morgantown, West Virginia
  • End Date:
    20160929
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:3cd9831652fd9aa0b4e22c4b6706a5efb33ba957059e7b192aeeb999e3a092769d1504bc1002e622b6c7770ebcef8cab79f73fee4f3728800f3756020e05ba50
  • Download URL:
  • File Type:
    Filetype[PDF - 875.72 KB ]
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