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《Chinese Journal of Underground Space and Engineering》 2013-05
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Research on Water-bursting of Karst Collapse Columns Considering the Coupling Relation between Seepage and Stress

Li Zhengli;Wang Lianguo;Hou Huaqiang;State Key Laboratory for Geomechanics & Deep Underground Engineering,China University of Mining & Technology;  
Water-bursting of karst collapse column is affected by many factors,the primary one of which is the change of partial rock stress caused by mining working face boosting.The rising level of confined water head and the change of seepage quantity are used as simplified criterion and the stress-fluid coupling programming was developed by FISH language of FLAC3Dsoftware based on the stress-fluid coupling experimental formula.Using the programming and combining it with the actual situation in a working face at Tuanbai Colliery in China,the whole water inrush process of karst collapse columns which is water-filled and water-conducted in edge above confined water is numerically simulated.Based on the simulation result and the mechanical mechanism analysis,the characteristics of seepage and the dangerous water bursting area of the collapse column are acknowledged and therefore instructions of colliery safety production could be given.
【Fund】: 国家重点基础研究发展计划(973)项目(2010CB226805);; 国家自然科学基金项目(50874103);; 国家重点实验室开放基金项目(SKLGDUEK0905)
【CateGory Index】: TD745
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