Evaluation of three-dimensional Hoek-Brown strength criteria

Research output: Contribution to conferencePaper

Abstract

In this paper, three three-dimensional (3D) versions of the Hoek-Brown strength criterion, respectively proposed by Pan and Hudson [1], Priest [2] and Zhang and Zhu [3], are briefly reviewed and evaluated. The evaluation shows that neither the Pan-Hudson criterion nor the Priest criterion will reduce to the form of the Hoek-Brown criterion at triaxial or biaxial stress state. Compared with the Hoek-Brown criterion, the Pan-Hudson criterion under-predicts the strength at triaxial stress state but overpredicts the strength at biaxial stress state. The Priest criterion predicts the same strength as the Hoek-Brown criterion at triaxial stress state but over-predicts the strength at biaxial stress state. The Zhang-Zhu criterion reduces to the form of the Hoek-Brown criterion at both triaxial and biaxial stress states and thus can be considered a true 3D version of the Hoek-Brown criterion. The three 3D strength criteria are also applied to analyze true triaxial compression test data of intact rocks collected from the published literature. Predictions of the Zhang-Zhu criterion are in good agreement with the test data for a range of different rock types, but the Pan-Hudson tends to under-predict and the Priest criterion tends to over-predict the strength of rocks.

Original languageEnglish (US)
StatePublished - Dec 1 2008
Event42nd U.S. Rock Mechanics - 2nd U.S.-Canada Rock Mechanics Symposium 2008 - San Francisco, CA, United States
Duration: Jun 29 2008Jul 2 2008

Other

Other42nd U.S. Rock Mechanics - 2nd U.S.-Canada Rock Mechanics Symposium 2008
CountryUnited States
CitySan Francisco, CA
Period6/29/087/2/08

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

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  • Cite this

    Zhang, L. (2008). Evaluation of three-dimensional Hoek-Brown strength criteria. Paper presented at 42nd U.S. Rock Mechanics - 2nd U.S.-Canada Rock Mechanics Symposium 2008, San Francisco, CA, United States.