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A New Three-Dimensional Rock Mass Strength Criterion

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Recent Advances in Geo-Environmental Engineering, Geomechanics and Geotechnics, and Geohazards (CAJG 2018)

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Abstract

A new three-dimensional rock mass strength criterion was developed in this paper by extending an existing rock mass strength criterion. This criterion incorporates the effects of the intermediate principal stress, minimum principal stress and the anisotropy resulting from these stresses acting on the fracture system. In addition, the criterion has the capability of capturing the anisotropic and scale dependent behavior of the jointed rock mass strength by incorporating the effect of fracture geometry through the fracture tensor components. The new criterion was proposed after analyzing 284 numerical modeling results of the poly-axial, triaxial and biaxial compression tests conducted on the jointed rock blocks having one or two joint sets by the PFC3D software. Some of these simulation results were compared with experimental ones to validate the developed PFC3D model that was used for numerical modeling of jointed blocks. In this research to have several samples with the same properties, a synthetic rock material that is made of a mixture of gypsum, sand and water was used. To express the new rock mass strength criterion, it was also necessary to determine the intact rock strengths under the same confining stress combinations mentioned earlier. Therefore, the intact rock was also numerically simulated for all three compression tests and the intact rock strengths were found for 33 different minimum and intermediate principal stress combinations.

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References

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Author information

Authors and Affiliations

  1. Rock Mass Modeling and Computational Rock Mechanics Laboratories, University of Arizona, Tucson, AZ, 85721, USA

    Pinnaduwa H. S. W. Kulatilake & Mohammad Hadi Mehranpour

  2. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing, China

    Ma Xingen & Manchao He

Authors
  1. Pinnaduwa H. S. W. Kulatilake
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  2. Mohammad Hadi Mehranpour
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  3. Ma Xingen
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  4. Manchao He
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Corresponding author

Correspondence to Pinnaduwa H. S. W. Kulatilake .

Editor information

Editors and Affiliations

  1. Sfax National School of Engineering, University of Sfax, Sfax, Tunisia

    Amjad Kallel

  2. Kütahya Dumlupınar University, Kütahya, Turkey

    Zeynal Abiddin Erguler

  3. China University of Mining and Technology, Xuzhou, Jiangsu, China

    Zhen-Dong Cui

  4. The University of Western Australia, Perth, WA, Australia

    ALi Karrech

  5. University of Adelaide, Adelaide, WA, Australia

    Murat Karakus

  6. Department of Materials Science and Engineering, The University of Arizona, Tucson, AZ, USA

    Pinnaduwa Kulatilake

  7. Edith Cowan University, Perth, WA, Australia

    Sanjay Kumar Shukla

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Kulatilake, P.H.S.W., Mehranpour, M.H., Xingen, M., He, M. (2019). A New Three-Dimensional Rock Mass Strength Criterion. In: Kallel, A., et al. Recent Advances in Geo-Environmental Engineering, Geomechanics and Geotechnics, and Geohazards. CAJG 2018. Advances in Science, Technology & Innovation. Springer, Cham. https://doi.org/10.1007/978-3-030-01665-4_1

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