从花岗岩爆坑方位和级别反演区域水平主应力方向和大小——以北天山某TBM施工隧道为例  

Inversion of the direction and magnitude of regional horizontal principal stress from the orientation and grade of granite crater-Take a TBM tunnel in North Tianshan Mountain as an example

作　　者：滕杰[1] 吴彤[1] 尚彦军[2,3,4] 邵鹏 闫晓石 荆理 Teng Jie;Wu Tong;Shang Yanjun;Shao Peng;Yan Xiaoshi;Jing Li(China Water Resources Beifang Investigation,Design and Research Co.Ltd.,Tianjin 3002222,China;Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;University of Chinese Academy of Sciences,Beijing 100049,China;Xinjiang Key Laboratory of Geohazard Prevention(Xinjiang Institute of Engineering),Urumqi 830023,China)

机构地区：[1]中水北方勘测设计研究有限责任公司,天津300222 [2]中国科学院地质与地球物理研究所,北京100029 [3]中国科学院大学,北京100049 [4]新疆地质灾害防治重点实验室(新疆工程学院),新疆乌鲁木齐830023

出　　处：《新疆地质》2022年第4期522-527,共6页Xinjiang Geology

基　　金：科技部科技基础资源调查专项(2018FY100503);科技部第二次青藏高原综合科学考察研究项目(2019QZKK0904)共同资助。

摘　　要：采用脆性剪切破裂理论和圆形隧道断面爆坑方位,探索区域地应力反演方法。通过北天山某隧道中花岗岩岩爆坑位置及烈度级别,反演最大切向应力和隧道断面最大主应力方向和大小。结合部分实测地应力三分量结果,求得圆形洞室弹性解的最大主应力。与实测结果对比发现,反演得到的水平方向最大主应力数值稍大,说明地应力测试点避开断层结构或受花岗岩隐形结构面影响,存在实际测试数据结果偏小的异常现象。该研究结果可为类似工程勘察设计和地应力测试提供参考。It is of great signifcance to explore the inversion method of regional geostress by using the brittle shear fracture theory and the orientation of the round tunnel section crater.The maximum tangential stress and the direction and magnitude of the maximum principal compressive stress of the tunnel section are inversed through the location and intensity level of the granite rock blasting pit in a tunnel in the North Tianshan Mountains,and then the maximum principal stress of the elastic solution of the circular cavern is obtained by combining the three component results of measured ground stress.Compared with the measured results,it is found that the maximum horizontal principal stress obtained by inversion is slightly larger,which indicates that the in-situ stress test points avoid fault structures or are afected by structural planes,and the actual test data results are smaller.The results of this paper are expected to provide reference for similar engineering investigation and design and insitu stress testing.

关 键 词：隧道 花岗岩 岩爆 切向应力 地应力 

分 类 号：P315.727[天文地球—地震学]