人民长江2016，Vol.47Issue(7)：64-67,4.DOI:10.16232/j.cnki.1001-4179.2016.07.014
高地应力条件下隧道TBM施工岩爆分析
Analysis of rock burst of TBM tunnel excavation under high ground stress
陈琼 1陈恩瑜1
作者信息
- 1. 中国葛洲坝集团第三工程有限公司，陕西 西安710065
- 折叠
摘要
Abstract
Under high ground stress, the rock burst is easily induced by the excavation of underground engineering in brittle rock mass. Taking the large overburden diversion tunnel excavation of N-J hydroelectric project as a case, the stress relieving method was firstly adopted in in-situ test. According to the results of ground stress test, the tectonic stress is the dominated ground stress and the maximum principal stress is up to 107 MPa, which is the main cause of the rock burst. Furthermore, to an-alyze the rock burst law of diversion tunnel, the ground stress field is transformed to the local coordinate of the tunnel; by the consideration of the shear stress effect of ground stress field, the distribution range of rock burst is calculated by using the numeri-cal method, which is compared with the field monitoring results.关键词
高地应力/岩爆/应力解除法/TBMKey words
high ground stress/rock burst/stress relieving method/TBM分类
建筑与水利引用本文复制引用
陈琼,陈恩瑜..高地应力条件下隧道TBM施工岩爆分析[J].人民长江,2016,47(7):64-67,4.
