Numerical Analysis of Joint Rock Shear Properties Considering Joint Geometrical Characters

Abstract:

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The purpose of this paper is to study the shear behavior of rock specimens containing joints with various distribution forms. Two sets of specimens are simulated by the rock failure process analysis code (RFPA2D). The friction-sliding failure pattern occurs with the lower undulation angle specimen, and the failure pattern turns to be tensile-shear failure mode gradually with the increase of undulation angle. The specimen possesses the highest peak shear load when the undulation angle is about 30º. And joint rock shear character also deteriorates with the increase of weak interlayer thickness. In the intermittent joint model, the unified connection ratio specimen’s peak shear load increases with rock bridge amount, and the multi-joint mode is beneficial to keep rock mass shear stiffness. This study comes to meaningful results to the expansion of joint rock strength evolution law with various joint distribution forms.

Info:

Periodical:

Edited by:

Honghua Tan

Pages:

149-154

DOI:

10.4028/www.scientific.net/AMM.29-32.149

Citation:

Q. Zhang et al., "Numerical Analysis of Joint Rock Shear Properties Considering Joint Geometrical Characters", Applied Mechanics and Materials, Vols. 29-32, pp. 149-154, 2010

Online since:

August 2010

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Price:

$35.00

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