Abstract
About 75% water-inrush accidents in China are caused by geological structure such as faults, therefore, it is necessary to investigate the water-inrush mechanism of faults to provide references for the mining activity above confined water. In this paper, based on the fluid-solid coupling theory, we built the stress-seepage coupling model for rock, then we combined with an example of water-inrush caused by fault, studied the water-inrush mechanism by using the numerical software COMSOL Mutiphysics, analyzed the change rule of shear stress, vertical stress, plastic area and water pressure for stope with a fault, and estimated the water-inrush risk at the different distances between working faces and the fault. The numerical simulation results indicate that: (1) the water-inrush risk will grow as the decrease of the distance between working face and the fault; (2) the failure mode of the rock in floor with fault is shear failure; (3) the rock between water-containing fault and working face failure is the reason for water-inrush.
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Supported by the National Basic Research Program of China (2010CB226800); the National Natural Science Foundation of China (50904065); the Program for New Century Excellent Talents in University (NCET-09-0728)
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Huang, Hf., Mao, Xb., Yao, Bh. et al. Numerical simulation on fault water-inrush based on fluid-solid coupling theory. J Coal Sci Eng China 18, 291–296 (2012). https://doi.org/10.1007/s12404-012-0312-8
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DOI: https://doi.org/10.1007/s12404-012-0312-8