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Coupling Analysis between Stress Induced Anisotropic Damage and Permeability Variation in Brittle Rocks

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Abstract:

In this paper, a coupling constitutive model is proposed for anisotropic damage and permeability variation in brittle rocks before cracks fully coalesce. In this coupling model, an anisotropic damage model is employed to perform the mechanical analysis, and a statistical penetration model is set up to describe the effective porosity and permeability evolution in brittle rocks. For the coupling analysis, anisotropic damage model offers statistical penetration model the crack length in various directions, and statistical penetration model inversely provides anisotropic damage model with permeability of rock for coupling hydro-mechanical analysis. The proposed coupling model is applied to Lac du Bonnet granite, and generally a good agreement is obtained between numerical simulations and experimental data.

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Periodical:

Key Engineering Materials (Volumes 340-341)

Pages:

1133-1138

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.340-341.1133

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Online since:

June 2007

Authors:

Hui Zhou, Jian Fu Shao, Xia Ting Feng, Da Wei Hu

Keywords:

Anisotropic Damage Model, Brittle Rock, Coupling Hydro-Mechanical Model, Statistical Penetration Model

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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