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岩体中的裂隙是影响其物理力学性质的关键因素,对裂隙岩体进行拓扑识别,是各种不连续数值分析方法的基础.由于裂隙随机分布且数量巨大,使得裂隙岩体中的块体形状复杂、块体搜索难度很大.考虑裂隙分布的随机性及块体中的非贯通裂隙,提出了三维裂隙岩体拓扑识别的切割算法.首先,生成初始块体,并根据裂隙的统计数据随机生成其几何信息.然后,逐条加入裂隙面,通过其与已有块体的线段、多边形面的相对位置关系,进行拓扑计算,实现其对已有块体的切割,从而生成新的块体信息.最后,通过算例分析,对所提的切割算法的效率进行了验证.该方法能够快速、有效地实现三维裂隙岩体的拓扑识别,且能记录块体内部的非贯通裂隙,可以作为裂隙岩体非饱和渗流分析及裂隙扩展过程模拟分析的基础.
The fractures in a rock mass are the key factors affecting the physical and mechanical properties of a rock mass. Topological identification of the fractured rock mass is the basis of various discontinuous numerical analysis methods. Due to the random distribution and huge number of fractures, The complexity of the shape and the block search are very difficult.According to the randomness of the fracture distribution and the non-through fissures in the block, a cutting algorithm for topological identification of the three-dimensional fractured rock mass is proposed.Firstly, the initial block is generated and calculated according to the statistical data And randomly generate its geometry information, and then join the fracture surface one by one, and through its relative position relationship with the line segment and polygon surface of the existing block, calculate the topological calculation and realize the cutting of the existing block to generate the new block Information.Finally, the efficiency of the proposed cutting algorithm is verified by an example analysis.The method can quickly and effectively realize the topological identification of three-dimensional fractured rock mass and can record the non-through fracture in the block body, which can be used as Unsaturated Seepage Analysis of Fractured Rock Mass and Foundation of Simulation Analysis of Crack Propagation Process.