高地应力条件下大型地下洞室群围岩失稳模式分类及调控对策  

CLASSIFICATION OF FAILURE MODES AND CONTROLLING MEASURES FOR SURROUNDING ROCK OF LARGE-SCALE CAVERNS WITH HIGH GEOSTRESS

作　　者：董家兴[1,2] 徐光黎[2] 李志鹏[2] 宋胜武[3] 张世殊[3] 肖平西[3] 张方涛[2] 申艳军[4] 

机构地区：[1]昆明理工大学电力工程学院,云南昆明650500 [2]中国地质大学岩土钻掘与防护教育部工程研究中心,湖北武汉430074 [3]中国电建集团成都勘测设计研究院有限公司,四川成都610072 [4]西安科技大学建筑与土木工程学院,陕西西安710054

出　　处：《岩石力学与工程学报》2014年第11期2161-2170,共10页Chinese Journal of Rock Mechanics and Engineering

基　　金：中国电建集团公司科研项目(P099);国家自然科学基金资助项目(41472263)

摘　　要：锦屏一级、猴子岩等大型水电工程地下洞室群的施工过程中出现岩爆、塌方、大变形及支护后喷层、围岩开裂等围岩变形破坏现象,对围岩变形失稳模式及针对性的调控措施缺乏系统、总结性的研究。在收集大岗山、锦屏一级、猴子岩、官地等多个典型水电工程地下洞室群施工地质、设计、物探、监测资料及现场调查的基础上,从控制因素上将围岩失稳模式分为岩体结构控制型重力驱动型、应力驱动型、复合驱动型3种类型;从破坏主要发生的工程部位将破坏模式归纳为5个部位、16种基础模式;以猴子岩水电工程主厂房动态调控为实例,说明所提出的调控措施的有效性和可行性。该研究成果可为大型地下洞室动态设计提供借鉴,为施工安全的保障提供理论依据,具有重要的工程意义。Rockburst,collapse,large deformation of shotcrete layers after support,rock cracks and other damage phenomena appeared in the underground caverns of Jinping I,Houziyan and other large hydropower projects during construction. Systematic researches have seldom been performed on the deformation and instability modes of surrounding rock and the controlling measures. Based on the collected geological and design data,the geophysical surveying,the monitored data and the field investigation in underground caverns of Dagangshan,1st stage of Jinping,Houziyan,Guandi and other typical hydropower projects during construction,the failures of surrounding rock are divided into 3 modes：the rock structure controlled and gravity-driven mode;the stress-driven mode and the mixed mode according the controlling factors. The failure modes can also be divided into 16 basic modes according to the main project sites where instability occurs in 5 areas of the caverns. The proposed controlling measures were used in Houziyan project to show their feasibility and effectiveness.

关 键 词：岩石力学 高地应力 地下洞室群 破坏模式 动态调控 

分 类 号：TU45[建筑科学—岩土工程]