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随着煤炭开采深度的增加,受奥灰岩溶底板高承压水的威胁日趋严重,矿井突水事故的频率不断增加,尤其是含断层构造的奥灰岩溶承压底板的情形。本文建立弹塑性多孔介质渗流应力耦合模型;并基于此耦合模型,应用多物理场数值模拟软件COMSOL Multiphysics和MATLAB软件编程,结合徐州某矿突水实例,分析了采动影响下承压采场底板断层活化的影响规律。研究表明:在采动和水压的共同作用下,随着采场的推进,断层活化区域由底部不断向上扩展,当断层活化区域与采场底板的塑性破坏区相连时,对于含水断层即形成导水通道,可能引发底板突水事故。研究结果可为承压水上采煤底板断层突水的防治提供参考。
With the increase of the depth of coal mining, the threat of high confined water of the limestone karst floor becomes more and more serious, and the frequency of mine water inrush accidents is increasing continuously, especially in the case of fault limestone karst floor with fault structure. Based on this coupling model, multi-physics numerical simulation software COMSOL Multiphysics and MATLAB software programming, combined with a case of water inrush in a mine in Xuzhou, this paper analyzes the pressure-bearing stratum Influence of fault activation. The results show that with the joint action of mining and water pressure, the active area of fault expands continuously from bottom to bottom along with the advancement of stope. When the fault activation area is connected with the plastic failure area of stope floor, Aqueduct may cause floor water inrush accident. The research results may provide a reference for the prevention and treatment of the fault water inrush on the floor of confined water mining.