裂隙岩体表征方法及岩体水力学特性研究

 岩体中裂隙展布的多样性和随机性是裂隙岩体工程特性研究的关键问题。考虑岩体裂隙几何形态(走向、倾角、迹长、间距、隙宽等)的随机性，利用Monte Carlo模拟技术，编制裂隙网络生成程序RFNM2D和RFNM3D。利用RFNM，不但能够生成可以描述和表征岩体及其裂隙结构信息的虚拟裂隙网络岩体，还能够将生成的裂隙网络岩体进行数值离散化，从而可以直接和多种数值计算方法(有限元法、离散元法等)相结合来解决实际工程问题。因此，RFNM生成的裂隙网络岩体实际上是一种数字随机裂隙岩体模型。基于渗流力学理论，应用有限元方法编制软件GeoCAAS，研究裂隙岩体的水力学特性，探讨裂隙几何形态对渗流性状的影响。

REPRESENTATION METHOD OF FRACTURED ROCK MASS AND ITS HYDRAULIC PROPERTIES STUDY

The multiplicity and randomness of fractures distribution in rock mass are key issues in research on engineering properties of fractured rock mass. The randomness of fractures geometrical shapes(orientation，dip，trace length，spacing，and width) of fractures is considered；and Monte Carlo simulation technique is adopted to develop a new code RFNM(including RFNM2D and RFNM3D). By RFNM，not only the virtual fractured rock mass，in which the structure information of fractures is described and the real engineering rock mass is represented，can be generated；but also the digital fractured rock mass can be discretized and then be combined with numerical methods(such as FEM，DEM，and so on) to solve practical engineering problems. Therefore，the virtual fractured rock mass with random fracture networks is a digital fractured rock mass model actually. In addition，based on seepage theory of porous media，FEM is adopted to develop the software GeoCAAS (geo-engineering computer aided analysis system). The hydraulic properties of fractured rock mass are studied；and the effects of fracture geometrical shapes on the seepage properties are discussed.