深部巷道分区破裂化计算理论与实测对比研究  

Theoretical research on zonal disintegration of rock masses around deep tunnels and comparisons with in-situ observations

作　　者：王明洋 陈昊祥 李杰 李新平[2] WANG Mingyang;CHEN Haoxiang;LI Jie;LI Xinping(State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact,The Army Engineering University of PLA,Nanjing,Jiangsu 210007,China;Hubei Key Laboratory of Roadway Bridge and Structure Engineering,Wuhan University of Technology,Wuhan,Hubei 430070,China)

机构地区：[1]陆军工程大学爆炸冲击防灾减灾国家重点实验室,江苏南京210007 [2]武汉理工大学道路桥梁与结构工程湖北省重点实验室,湖北武汉430070

出　　处：《岩石力学与工程学报》2018年第10期2209-2218,共10页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金重大科研仪器研制项目(51527810);国家自然科学基金资助项目(51679249)~~

摘　　要：通过深入研究深部工程围岩压力、位移累积大小和应力应变峰后下降快慢对围岩能量汇聚与释放、耗散与储存的特征影响关系,发现随工程埋深增加,围岩释放能量随破坏影响范围具有等级递减特征规律。首次提出围岩压力与扰动荷载"静动"组合作用理论计算模型,弄清了深部岩体动载扰动下含能岩体势能转化为动能的规律,给出了围岩分区破裂化序列大小规模相适应的特征能量阈值,揭示了"静动"组合特征能量大小是决定产生分区破裂化的关键机制。通过与现场实测和室内模拟实验结果对比,验证了理论与计算方法的正确性。提出的特征能量因子及其理论方法为探寻复杂岩土工程(如复杂边坡等)灾变预测、预报及防控提供了新的理论与技术路线。The effects of in situ stress,cumulative displacement and stress-strain relationship on the concentration,release,storage and dissipation of energy in surrounding rock masses are investigated in this paper. The energy released from the surrounding rock was found to decrease with the growth of damaged range. A theoretical model considering the combined effects of surrounding rock pressure and disturbing loads was proposed. The transformation of potential and kinetic energy in surrounding rock masses under the disturbing loads was clarified. The characteristic values of the energy threshold corresponding to different damaged zones were given. The key mechanism of zonal disintegration was revealed to be the magnitude of the combined characteristic energy. The accuracy of the theoretical and calculation method was validated by comparing with the in situ and in-door experimental data.

关 键 词：岩石力学 深部围岩 有势场 能量汇因子 分区破裂 

分 类 号：TU45[建筑科学—岩土工程]