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以往在研究洞室开挖引起围岩的应力重分布时,多从均质连续的角度出发来研究受力条件和洞室形状对围岩应力分布的影响。但近年来研究表明岩体应力的分布是受岩体结构及岩体特征所控制的。而工程岩体中普遍存在着大规模的结构面或其他软弱裂隙面,这些结构面在很大的程度上影响着围岩的应力重分布。文章试图运用离散单元法数值模拟分析了一组节理结构面对洞室应力的重分布的影响规律。
In the past, when studying the stress redistribution of surrounding rock due to excavation of caverns, the influence of stress conditions and the shape of cavern on the stress distribution of surrounding rock was investigated from the perspective of homogeneous continuity. However, recent studies show that the distribution of rock mass stress is controlled by the rock mass structure and rock mass characteristics. Large-scale structural planes or other weak-fractured planes are commonly found in engineering rock mass. These structural planes affect the stress redistribution of the surrounding rock to a large extent. The article attempts to use the discrete element method to simulate the influence of a set of joint structure on the stress redistribution in cavern.