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对地下水在各项异性裂隙岩体中的三维渗流进行分析,为裂隙岩体渗流计算提供更为有效的模拟分析方法。裂隙系统可以分为主干裂隙和网络状裂隙两类。对于岩体主干裂隙中的水运动使用离散介质渗流模型加以描述,对于网络状裂隙则使用连续介质渗流模型加以描述,并依据水量和水头关系把两者耦合起来。给出了网络状裂隙的等效连续介质渗透系数计算方法和耦合模型中实现源与汇作用的方法。理论分析和实际应用结果表明,耦合模型既能刻画主干裂隙特殊的导水作用,又能体现网络状裂隙的贮水性质,同时便于工程应用。耦合渗流模型被应用到乌江构皮滩水利枢纽的岩体渗流分析中。
The three-dimensional seepage flow of groundwater in the anisotropic fractured rock mass is analyzed, which provides a more effective simulation analysis method for fractured rock mass seepage calculation. Fracture system can be divided into two main types of cracks and network-like fractures. The discrete media seepage model is used to describe the water movement in the main fractures of the rock mass. For the network-like fractures, the continuous media seepage model is used to describe the water flow, and the two are coupled according to the relationship between the water quantity and the water head. The calculation method of equivalent continuous medium permeability coefficient of network-like fractures and the method of realizing source and sink interaction in coupled model are given. The theoretical analysis and practical application show that the coupling model can not only depict the special water-conducting effect of the main fractures but also the water-storage properties of the network-like fractures, and at the same time facilitate the engineering application. Coupling seepage model is applied to rock mass seepage analysis of Goupitan Hydropower Project.