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Estimation of Rock In-Situ Strength Using Rock Strength Borehole Probe (RSBP)



Details

  • Personal Author:
  • Description:
    One of the main parameters that is commonly used for the rock mass characterization is the Uniaxial Compressive Strength (UCS) of the intact rock. This parameter is conventionally measured by diamond drilling to obtain core, and testing core samples in the laboratory, which is an expensive and time consuming process. It would be ideal if the strength of the intact rock could be estimated in the field as an in-situ measurement by running a device inside a borehole. Estimation of the rock strength by scratch tests has been reasonably accurate. Application of this concept for the assessment of rock strength in a borehole has led to development of a borehole strength measurement probe, namely Rock Strength Borehole Probe (RSBP). RSBP is designed to scratch the surface of rock with a miniature disc cutter inside a relatively slim borehole. The cutting forces are measured and used to estimate the rock strength. This paper discusses the background theories and experimental tests conducted for development of the RSBP, along with formulas developed for estimating the compressive and tensile strengths of the intact rocks. The RSBP probe and its components are briefly explained, and the observations from the initial field experiments with this probe are discussed in this paper. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • Publisher:
    American Rock Mechanics Association (ARMA)
  • 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
  • NIOSHTIC Number:
    nn:20068898
  • Citation:
    51st US Rock Mechanics/Geomechanics Symposium, June 25-28, 2017, San Francisco, California. Alexandria, VA: American Rock Mechanics Association (ARMA), 2017 Jun; :ARMA 17-652
  • Federal Fiscal Year:
    2017
  • Performing Organization:
    Pennsylvania State University
  • Peer Reviewed:
    False
  • Start Date:
    20110929
  • Source Full Name:
    51st US Rock Mechanics/Geomechanics Symposium, June 25-28, 2017, San Francisco, California
  • End Date:
    20160929
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:daff464d873986cbf84243c981dd4de3fbf338ab4ed0ef02a260556e37f6f329ea0c4b15edb3855de787fcb1402ee1fb10592ecea4ed8bac91eaf794f3441d7f
  • Download URL:
  • File Type:
    Filetype[PDF - 3.72 MB ]
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