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Joint Elasticity Effect on the Failure Behaviours of Rock Masses using a Discrete Element Model

Author

Listed:
  • Yong Yuan

    (The State Key Laboratory of Coal Resources and Safe Mining, School of Mines, Key Laboratory of Deep Coal Resource, Ministry of Education of China, China University of Mining & Technology, Xuzhou 221116, China)

  • Changtai Zhou

    (School of Civil, Environmental and Mining Engineering, The University of Adelaide, Engineering North, Adelaide, SA 5005, Australia)

  • Zhihe Wang

    (School of Civil, Environmental and Mining Engineering, The University of Adelaide, Engineering North, Adelaide, SA 5005, Australia)

  • Jifang Du

    (Department of Transportation Science and Engineering, Beihang University, Beijing 100191, China)

Abstract

It is widely accepted that the mechanical properties and failure behaviours of a rock mass are largely dependent upon the geometrical and mechanical properties of discontinuities. The effect of joint elasticity on the failure behaviours of rock masses is investigated using a discrete element model, namely, the synthetic rock mass model. Here, uniaxial compression tests of the numerical model are carried out for the rock mass model with a persistent joint to analyse the role of joint elasticity in the failure process with various joint orientations, β . A strong correlation between the joint elasticity and failure strength is found from the simulation results: a positive relationship when the joint orientation β < φ j ; a negative relationship when the joint orientation φ j < β < 90 ° ; and a very limited effect when the joint orientation β = 90 ° . Additionally, it is shown that the joint elasticity is the governing factor in the transition of failure modes, especially from the sliding failure mode along the joint to the mixed sliding-tensile failure mode.

Suggested Citation

  • Yong Yuan & Changtai Zhou & Zhihe Wang & Jifang Du, 2018. "Joint Elasticity Effect on the Failure Behaviours of Rock Masses using a Discrete Element Model," Energies, MDPI, vol. 11(11), pages 1-14, November.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:11:p:2968-:d:179670
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    References listed on IDEAS

    as
    1. T. Bai & D. D. Pollard & H. Gao, 2000. "Explanation for fracture spacing in layered materials," Nature, Nature, vol. 403(6771), pages 753-756, February.
    2. Yu Wang & Changhong Li & Yanzhi Hu & Tianqiao Mao, 2017. "Brazilian Test for Tensile Failure of Anisotropic Shale under Different Strain Rates at Quasi-static Loading," Energies, MDPI, vol. 10(9), pages 1-11, September.
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