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深部岩体是一种具有初始损伤的非连续介质,其内部存在着大量节理和裂隙.深部岩体分区破裂化效应与节理、裂隙的扩展、连接和汇合密切相关.节理、裂隙的扩展、连接和汇合可能会导致深部岩体的内部空间由欧氏几何空间向非欧几何空间转化.论文利用损伤变量表示含节理和裂隙岩体的损伤,根据非欧几何模型,获得了静水压力和非静水压力情况下深部圆形洞室损伤围岩的应力场,确定了损伤变量对圆形洞室围岩的应力场和分区破裂化效应的影响.采用Mohr-Coulomb准则,获得了静水压力和非静水压力情况下深部损伤围岩的破裂区与非破裂区的分布规律.论文的研究结果为理解深部岩体分区破裂模式提供了有价值的参考.
Deep rock mass is a kind of discontinuous medium with initial damage, and there are a large number of joints and fractures in it.The partitioning effect of deep rock mass is closely related to the expansion, connection and convergence of joints and fractures. And confluence may lead to the transformation of the internal space of deep rock mass from Euclidean geometry space to non-Euclidean space.In this paper, we use the damage variables to represent the damage of joints and fractured rock masses, and according to non-Euclidean geometry, hydrostatic pressure and non-hydrostatic The stress fields of surrounding rock damaged by deep circular caverns under pressure are determined, and the influence of damage variables on the stress field and zoning of surrounding rock in circular caverns is determined. Using the Mohr-Coulomb criterion, the hydrostatic pressure and non-hydrostatic The distribution of rupture zone and non-rupture zone of surrounding rock under pressure condition.The research results of the dissertation provide valuable references for understanding the rupture mode of deep rock zone.