岩土工程学报2012，Vol.34Issue(9)：1677-1684,8.
开挖扰动下高应力岩体的能量演化与应力重分布规律研究
Energy evolution and stress redistribution of high-stress rock mass under excavation distribution
摘要
Abstract
In order to reveal the mechanism of the occurrence of deep engineering catastrophe and the influence of various factors on excavation perturbing effect, the models with different original stress states and different excavation sections are established by using the distinct element numerical simulation software PFC. Through explicit calculation, the kinetic release curves of high-stress rock mass under various circumstances are gained, and the peak and final stable values of the obtained curves are regarded as energy indices, which are used for representing the disturbance intensity and the stability degree of the excavation system respectively. The analysis based on these indices shows that the excavation with a circular cross section will induce the minimum disturbance effect under a nearly hydrostatic pressure stress state. The stress redistribution characteristics of high original stress rock mass excavated by different sections are also studied. Through the inspection of stress redistribution course which is regarded as an unloading process, the influence mechanisms of the original rock mass stress state and the geometry of excavation section on the stress redistribution are revealed ultimately.关键词
深部开挖/能量演化/应力重分布Key words
deep excavation/energy evolution/stress redistribution分类
建筑与水利引用本文复制引用
邹洋,李夕兵,周子龙,尹土兵,殷志强..开挖扰动下高应力岩体的能量演化与应力重分布规律研究[J].岩土工程学报,2012,34(9):1677-1684,8.基金项目
国家自然科学基金项目（50934006）：国家重点基础研究发展计划（973计划）项目 （）
