摘要
根据静兴高速公路白龙山隧道区域应力场特征,建立三维地质模型,采取有限元数值模拟的方法分析研究工程区的初始地应力场分布规律。通过分析隧道轴线方向上的地应力场特征,发现隧道区初始地应力场以构造应力为主导,区内存在较高地应力场,长度约为3150m。最后,根据地应力资料对高地应力区隧道开挖阶段进行岩爆预测,结果表明隧道计算段岩爆等级为弱岩爆~中等岩爆。
Based on the characteristics of regional in-situ stress data of Bailong mountain tunnel on Jingxing highway in Shanxi province,a 3D geological model is established and the distribution of initial in-situ stress field in the engineering area is studied by means of FEM numerical simulation.It is considered that initial principal stress is tectonic stress by analyzing the characteristics of initial in-situ stress field in the direction of tunnel axis,and there is a high in-situ stress field in the area,which is about 3 150 m in length.Finally,rock burst is predicted during tunnel excavation in high stress area,which is based on in-situ stress data.The results show that the possibility of weak and moderate rock burst in a section of the tunnel.
作者
刘国伟
LIU Guowei(Shanxi Transportation Environmental Protection Center Station Co.,Ltd.,Taiyuan 030006,China)
出处
《中国矿业》
北大核心
2019年第A02期465-468,共4页
China Mining Magazine
基金
山西省科技厅重点研发项目资助(编号：201603D321118)
山西省交通厅建设科技项目资助(编号：17-2-03)
关键词
隧道工程
初始地应力场
有限元数值模拟
岩爆
tunneling engineering
initial in-situ stress
FEM numerical simulation
rock burst
