耦合岩体主干裂隙和网络状裂隙渗流分析及应用

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。

Flow analysis by coupling dominant fracture and network fracture systems and its application

Dealing with the analysis of three dimensional fluid flow in a fractured anisotropic rock mass, an effective and practical simulation method is provided for the calculation of ground water flow in this rock mass where hydropower project is constructed. Fractures in a rock mass can be divided into dominant fracture system and network fracture system. A distinct medium method is applied to describe flow in the dominant fracture system while a continuum method is applied to describe flow in the network fracture system. The two systems are coupled together by hydraulic head and flux to constitute a coupled model. A method for the calculation of equivalent porous permeability is presented by using the fracture geometry data in a network fracture system. The results show that the coupled approach can effectively reflect the special effects of dominant fractures in terms of transmisivity and the properties of rock matrixes in terms of water storage. This model can be easily applied to practical engineering. The method was applied to the Wujiang hydropower project for ground water flow calculation in the rock mass.