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地下水在裂隙介质中的渗流和运移过程与在多孔介质中的过程存在机理上的差别,这与裂隙系统的尺度效应和非均质性有关,这也给数值模拟带来困难。采用裂隙网络模型可以对发生在不同尺度上的渗流和运移过程进行模拟,从而有效地解决以上存在的问题。构建裂隙网络模型的方法主要有体视学方法和随机模拟方法。按照假设条件和概念框架的不同,裂隙网络模型主要可分为连续体模型、离散裂隙模型和混合模型,在应用过程中可根据研究区的实际情况选择合适的模型。本文在对已有成果进行综合论述的基础上,指出其中存在的不足和需要改进之处,从而为以后的进一步研究指明方向。
The mechanism of groundwater seepage and migration in fractured media is different from the process in porous media, which is related to the scale effect and heterogeneity of fracture system, which also brings difficulties to numerical simulation. The fracture network model can be used to simulate the seepage and migration processes occurring on different scales so as to effectively solve the above problems. The main methods for constructing the fracture network model are stereological methods and stochastic simulation methods. According to the assumption and the conceptual framework, the fractured network model can be divided into continuum model, discrete fracture model and hybrid model. In the application process, the appropriate model can be selected according to the actual situation in the study area. Based on a comprehensive discussion of the existing achievements, this article points out the shortcomings and the improvements that need to be made so as to point out the direction for further research.