摘要
深埋引水隧洞TBM施工针对岩爆风险防治手段有限,一旦遭遇极强岩爆,将会掩埋TBM施工机械,研究适用于TBM开挖的岩爆风险防控手段意义重大。提出在深埋引水隧洞施工中采用钻爆导洞先行开挖进行应力释放的方法,对比了钻爆导洞开挖与全断面开挖方法(单一钻爆或TBM法)诱发的围岩应力调整过程,分析了导洞开挖诱发TBM扩挖掌子面附近的应变能演化规律,结果表明:钻爆导洞超前开挖降低了TBM扩挖工作面附近应变能积聚程度,应变能峰值积聚位置远离隧洞表面,使TBM扩挖断面处于应力释放区域,岩爆风险有所降低,最后依据现场案例验证了钻爆导洞开挖的应变能释放效果。
In deep buried water diversion tunnels,there are limited measures for preventing and controlling rock burst risks of TBM construction.Once an extremely strong rock burst occurs,the TBM machinery will be buried.Therefore,it is of great significance to study rock burst risk prevention and control measures suitable for TBM excavation.This paper proposes a method of using drilling and blasting pilot tunnels for stress release in the construction of deep buried water diversion tunnels.The stress adjustment process induced by drilling and blasting pilot tunnel excavation and full section excavation methods(single drilling and blasting or TBM method)was compared.The evolution law of strain energy near the TBM excavation face induced by pilot tunnel excavation was analyzed.The results show that the excavation of pilot tunnel reduces the degree of strain energy accumulation near the TBM excavation face,and the peak accumulation position of strain energy is far away from the tunnel surface,which will make the TBM excavation face in the stress release area and reduce the risk of rock burst.Finally,the strain energy release effect of drilling and blasting pilot tunnel excavation is verified based on case study.
作者
张翔宇
严鹏
徐梦煜
于浩
李一曼
吴家耀
朱永生
刘晓
ZHANG Xiang-yu;YAN Peng;XU Meng-yu;YU Hao;LI Yi-man;WU Jia-yao;ZHU Yong-sheng;LIU Xiao(Yajiang Clean Energy Science and Technology Research(Beijing)Co.,Ltd,Beijing 100048,China;State Key Laboratory of Water Resources Engineering and Management,Wuhan University,Wuhan 430072,Hubei Province,China)
出处
《中国农村水利水电》
北大核心
2025年第9期171-175,181,共6页
China Rural Water and Hydropower
基金
国家自然科学基金面上项目(52379108)
2023年度湖北省博士后创新研究岗位(博士后编号:325469)。
关键词
深埋隧洞
钻爆导洞
TBM扩挖
应变能
deep buried tunnel
drilling and blasting pilot tunnel
TBM expanding excavation
strain energy
作者简介
张翔宇(1996-),男,博士,主要从事深埋隧洞爆破施工及岩爆风险控制方面的研究工作。E-mail:zxywhu@whu.edu.cn;通讯作者:严鹏(1981-),男,教授,博士。E-mail:pyanwhu@whu.edu.cn。
