Fluid-Solid Coupling Analysis the Plastic Damage of the Surrounding Rock under the Influence of Confined Water Pressure and Mining Disturbance

Abstract:

In order to anlysis the rock deformation characteristics in influence of mining disturbances, water pressure and crustal stress, a multi-physics coupling model is created by Comsol4.2a in this paper. By debugging mining steps and water pressure, the model simulated rock stress and deformation characteristics.the results showed that: (1)the water pressure is fixed conditions, the plastic damage scope in stress concentration zone where was formed by mining disturbanceis were greater than the mining floor,and with an extension of the scope of mining, the scope of plastic failure zone in the rock surrounding which including the vertical and horizontal was increased; (2) Stope width is fixed conditions,with the water pressure increases, resulting in the surrounding rock mechanical strength decrease, and increase the scope of the plastic collapse and plastic damage within thefault zone intensified.

• Periodical: Advanced Materials Research (Volumes 616-618)
• Pages: 533-537
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.616-618.533
• Online since: December 2012
• Authors: Chun Hu Zhao
• Keywords: COMSOL, Deformation, Fluid Solid Coupling, Stress

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