深埋高地应力TBM隧道岩爆发生机理研究  

Study on Mechanism of Rockburst in Deep-Buried High Ground Stress TBM Tunnel

作　　者：杨腾杰 高新强[1,2,3] 王立川 薛永庆 孔超[5] 樊浩博 朱正国 赵静波[4] YANG Tengjie;GAO Xinqiang;WANG Lichuan;XUE Yongqing;KONG Chao;FAN Haobo;ZHU Zhengguo;ZHAO Jingbo(State Kay Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Key Laboratory of Mechanical Behavior Evolution and Control of Traffic Engineering Structures in Hebei,Shijiazhuang 050043,China;China Railway 18th Bureau Group Corporation Limited,Tianjin 300222,China;School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621000,China)

机构地区：[1]石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室,河北石家庄050043 [2]石家庄铁道大学土木工程学院,河北石家庄050043 [3]河北省交通工程结构力学行为演变与控制重点实验室,河北石家庄050043 [4]中铁十八局集团有限公司,天津300222 [5]西南科技大学土木工程与建筑学院,四川绵阳621000

出　　处：《国防交通工程与技术》2024年第3期18-23,11,共7页Traffic Engineering and Technology for National Defence

基　　金：石家庄铁道大学研究生创新资助项目(YC2023070);河北省自然科学基金(E202310057);中国铁建股份有限公司2019年度科技重大专项(2019-A05);河北省省级科技计划资助项目(225676162GH)。

摘　　要：为分析高地应力隧道岩爆发生机理,以西南山区某新建TBM隧道为工程背景,通过室内岩石力学试验分析围岩基本力学特性,然后基于弹性力学理论建立板裂屈曲岩爆的力学失稳模型,最后通过离散元UDEC软件对隧道岩爆演化过程进行分析。结果表明:①隧道围岩满足发生岩爆的岩性条件,岩爆倾向性为中等~强烈;②拱顶板裂屈曲岩爆可视为围岩板裂结构在水平切向应力作用下断裂失稳所导致,劈裂岩体厚度为岩爆主要影响因素;③隧道开挖卸荷后洞壁围岩开裂剥离弹射破坏主要是张拉破坏造成。为保障隧道施工安全提供理论依据。To analyze the role of high ground stress tunnel rockburst mechanism,we used a new TBM tunnel in the southwest mountainous area as the project background.Firstly,indoor rock mechanics tests were conducted to analyze the basic mechanical properties of the surrounding rock.Then,based on the theory of elasticity,we established a mechanical instability model of the plate fracture flexure rockburst.Finally,the tunnel rockburst evolution process was analyzed using the discrete element method in the UDEC software.The results show that:①The surrounding rock of the tunnels meets lithological conditions conducive to rockburst,with a moderate to strong tendency.②The arch plate fracture flexural rockburst can be regarded as the instability caused by the fracture of the surrounding rock plate structure under horizontal tangential stress.The thickness of the split rock mass is the primary factor influencing on rockburst.③After unloading during tunnel excavation,the main damage to the surrounding rock of the tunnel wall,including cracking,peeling and ejection,is primarily caused by tensile failure.The research in this paper provides a theoretical basis for ensuring tunnel construction safety.

关 键 词：高地应力隧道 岩爆机理 板裂屈曲 岩爆倾向性 离散元模拟 

分 类 号：U458[建筑科学—桥梁与隧道工程]