Determination of rock fracture parameters from crack models for failure in compression

John M. Kemeny, Neville G.W. Cook

Research output: Contribution to conferencePaper

10 Scopus citations

Abstract

Micromechanical models for axial splitting and for shear faulting are used to investigate parameters associated with rock fracture under compressive stresses. The fracture energies to create splitting fractures and shear faults are calculated using laboratory triaxial data. These energies are compared with the fracture energies for the propagation of microcracks that coalesce to form the larger scale fractures. It is found that for Westerly granite, the energies to create splitting fractures and shear faults are about three orders of magnitude greater than the energy needed to drive the tensile microcracks, due to the large amount of subsidiary crack surface area created in forming the larger scale fractures. A similar scale effect can be expected when extrapolating the laboratory results to field scale problems.

Original languageEnglish (US)
Pages367-374
Number of pages8
StatePublished - Jan 1 1987
Externally publishedYes
Event28th U.S. Symposium on Rock Mechanics, USRMS 1987 - Tucson, United States
Duration: Jun 29 1987Jul 1 1987

Other

Other28th U.S. Symposium on Rock Mechanics, USRMS 1987
CountryUnited States
CityTucson
Period6/29/877/1/87

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ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

Cite this

Kemeny, J. M., & Cook, N. G. W. (1987). Determination of rock fracture parameters from crack models for failure in compression. 367-374. Paper presented at 28th U.S. Symposium on Rock Mechanics, USRMS 1987, Tucson, United States.