基于离散元模拟和微震监测的地下厂房围岩稳定性研究
StabilityAnalysisonSurroundingRockMassinUndergroundCavernsBasedon DiscreteElementSimulationandMicroseismicMonitoring
作者：徐奴文(四川大学水力学与山区河流开发保护国家重点实验室)；李韬(四川大学 水力学与山区河流开发保护国家重点实验室)；戴峰(四川大学 水力学与山区河流开发保护国家重点实验室)；李彪(四川大学 水力学与山区河流开发保护国家重点实验室)；朱永国(国电大渡河猴子岩水电建设有限公司)；肖培伟(国电大渡河猴子岩水电建设有限公司)
Author：Xu Nuwen(StateKeyLab.ofHydraulicsandMountainRiverEng.,SichuanUniv)；Li Tao(State Key Lab. of Hydraulics and Mountain River Eng.,Sichuan Univ)；Dai Feng(State Key Lab. of Hydraulics and Mountain River Eng.,Sichuan Univ)；Li Biao(State Key Lab. of Hydraulics and Mountain River Eng.,Sichuan Univ)；Zhu Yongguo(China Guodian Dadu River Houziyan Hydropower Development Co.,Ltd)；Xiao Peiwei(China Guodian Dadu River Houziyan Hydropower Development Co.,Ltd)
收稿日期：2015-10-20 年卷（期）页码：2016,48(5):1-8
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：地下厂房洞室群；围岩稳定；数值模拟；微震监测；颗粒流程序
Key words：underground group caverns;rock mass stability;numerical simulation;microseismic monitoring;partical flow code
基金项目：国家重点基础研究发展计划资助项目(2015CB057903)；教育部新世纪优秀人才资助项目(NCET-13-0382)；四川省杰出青年基金资助项目（2014JQ0004）
中文摘要
针对猴子岩水电站地下厂房洞室群在开挖过程中围岩的稳定性问题，运用基于离散元基本理论的2维颗粒流PFC2D（particalflowcodein2Dimensions）软件，模拟了地下厂房洞室群开挖过程中控制性结构面对围岩变形和破坏的影响，再现了围岩损伤演化规律；同时引入微震监测技术对地下厂房围岩微震活动进行实时监测和分析，并将数值模拟与微震监测结果进行对比研究。结果表明,围岩开挖卸荷损伤与断层密切相关，颗粒流模拟得到的大型地下洞室群开挖过程中围岩损伤与微震监测结果基本一致。采用数值模拟和微震监测相结合的综合研究方法，可以有效评价地下厂房开挖过程围岩的损伤和预测潜在的失稳区域。
英文摘要
Aiming at the stability problems of the surrounding rock mass in the underground caverns at the Houziyan hydropower station subject to excation，based on the discrete element theory,the numerical simulation of excavation of the underground powerhouse caverns was performed using PFC2Dsoftware.The influences of the controlling structural planes on surrounding rock mass deformation and failure were simulated,and the damage evolution law was reproduced.Moreover,a high resolution microseismic monitoring system was adopted to real time monitor and analyze the microseismic activity in deep underground caverns.Then the results of numerical simulation were compared with microseismic monitoring.The results showed that excavation damage zone of surrounding rock mass was closely related to faults,and the surrounding rock mass damaged regions obtained from numerical simulation was in good agreement with those revealed by microseismic monitoring.Therefore the approach of combining numerical simulation and microseismic monitoring was proven to be very promising for evaluating the excavation damage zones and predicting the potential instability of surrounding rock mass in the underground caverns subjected to excavation.
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