Numerical Study on Seepage Mechanism of Rock Failure

Abstract:

Based on the heterogeneity of rock, the application of the theory of elastic damage mechanics, the Biot seepage mechanics and the theory of effective stress, considering the rock damage before and after the crack extension and penetration, the numerical calculation model using software RFPA is established in this article. Through the simulation research of rock specimens under the conditions of different osmotic pressure difference of seepage damage law, results show that the permeability coefficient of the rock and the crack, expansion and penetration is directly related to, but also affected by the failure mode of the rock. Permeability changes obviously lags behind the rock damage and crack or fissure extension, permeability of kick also lags behind the peak strength of rock.

• Periodical: Applied Mechanics and Materials (Volumes 522-524)
• Pages: 1399-1402
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.522-524.1399
• Online since: February 2014
• Authors: Hong Lei Liu*, Tao Qin
• Keywords: Coupling, Failure Mechanism, Whole Stress-Strain-Permeability

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