三维岩体随机结构面切割方法

三维岩体随机结构面切割及块体分析是块体理论的新发展,成为边坡工程和地下洞室围岩稳定分析的有效手段。通过生成三维岩体随机结构面网络,将结构面相互切割,生成新的面,运用面的回路方法形成块体,然后确定岩体开挖面上的可动块体并找出关键块体。经多次模拟,可以获得岩体开挖面形成的关键块体几何形状和尺度规模等统计特征,为工程系统支护方案提供较可靠的设计依据。

3-D random joints cutting of rock mass and blocks generation method

3-D random joints cutting of rock mass and block analysis is the new development of block theo-ry and has become an effective method of slope engineering and stability analysis of surrounding rock of un-derground caverns. Based on 3-D random fractures network simulation of rock mass, and through a series of procedures, including intersecting surfaces, new loops generation, closed block identification, all the po-tential removable rock blocks can be found out of all the finite blocks on the excavation surface, and the key blocks can be determined finally. By multiple simulations, the statistical characteristics of key blocks, such as geometry shape, size etc, can be achieved. The research results can provide a reliable basis for system reinforcement measures optimization of slope and underground caverns.