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Technical Note

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

1
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
2
School of Civil, Environmental and Mining Engineering, The University of Adelaide, Engineering North, Adelaide, SA 5005, Australia
3
Department of Transportation Science and Engineering, Beihang University, Beijing 100191, China
*
Author to whom correspondence should be addressed.
Energies 2018, 11(11), 2968; https://doi.org/10.3390/en11112968
Received: 14 September 2018 / Revised: 28 October 2018 / Accepted: 29 October 2018 / Published: 1 November 2018
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. View Full-Text
Keywords: anisotropy; discrete element model; joint stiffness; Jaeger’s criterion anisotropy; discrete element model; joint stiffness; Jaeger’s criterion
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MDPI and ACS Style

Yuan, Y.; Zhou, C.; Wang, Z.; Du, J. Joint Elasticity Effect on the Failure Behaviours of Rock Masses using a Discrete Element Model. Energies 2018, 11, 2968. https://doi.org/10.3390/en11112968

AMA Style

Yuan Y, Zhou C, Wang Z, Du J. Joint Elasticity Effect on the Failure Behaviours of Rock Masses using a Discrete Element Model. Energies. 2018; 11(11):2968. https://doi.org/10.3390/en11112968

Chicago/Turabian Style

Yuan, Yong, Changtai Zhou, Zhihe Wang, and Jifang Du. 2018. "Joint Elasticity Effect on the Failure Behaviours of Rock Masses using a Discrete Element Model" Energies 11, no. 11: 2968. https://doi.org/10.3390/en11112968

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