回顾了岩体裂隙系统的位置、轨迹长度、方位和开度等几何拓扑结构参数的分形特征表征方法，分析了CT扫描技术对分析裂隙分形特征的重要作用，系统介绍了逾渗理论在裂隙网络系统连通性研究方面的成果，并对基于Monte-Carlo随机模拟的岩体裂隙网络系统生成方法和岩体分形离散裂隙网络系统中流体流动模拟等研究成果进行了综述。基于岩体裂隙系统的分形特征和逾渗特征建立的离散裂隙网络系统模型能够真实反映岩体裂隙的结构特征，并揭示岩体分形离散裂隙网络系统中流体流动机理，但目前尚无大型的逾渗数值模拟商业软件，分形离散裂隙网络逾渗模型算法的实现将成为研究的热点。%Methods for description of fractal characteristics of geometric topological parameters of a rock fracture network system, including the length, aperture, orientation, and location, are reviewed. Percolation characteristics in the rock fracture network system and the important role of CT scanning technology in analyzing the fractal characteristic of fractures are pointed out. Achievements in research on the connectivity of the fracture network system using the percolation theory, methods for generation of the rock fracture network system based on the Monte-Carlo method, and simulation of fluid seepage in a fractal discrete fracture network system are systematically introduced. It is concluded that a model of the rock fractal discrete fracture network system constructed based on fractal characteristics and percolation characteristics can reflect the real rock fracture structure and seepage mechanism in the fracture network system. However, there is no large-scale commercial software for numerical simulation of percolation at present. Construction of a numerical model for the fractal discrete fracture network system based on the percolation theory will become the major research focus.
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