摘要
以九绵高速白马隧道为依托,通过数值模拟发现:隧址区断层、节理等构造是瓦斯运移的主要通道;隧道两侧中间和顶底面中部位置极易受围岩应力改造;裂缝面与压应力夹角小于35°,裂缝被拉开成为瓦斯溢出的快捷通道。
Taking the Bai Ma tunnel of Mianjiu express way as the experimental tunnel,the law of gas migration in the tunnel was analyzed,and the characteristics of crack development were studied numerically.The faults and joints are well developed become the main passage of gas migration.Secondary cracks and lateral shear are easily to be produced at the middle of flanks&top/bottom planes of the tunnel,which effect by surrounding rock stress.If the angle between fracture surface and compressive stresses less than 35°,closed crack will be opened and becomes a quick passage for gas overflow.
作者
孙璐
马洪生
苏培东
黄承义
Sun Lu;Ma Hongsheng;Su Peidong;Huang Chengyi(Sichuan Provincial Transport Department Highway Planning,Survey,Design And Research Institute,Chengdu Sichuan 610041;Institutes of Earth Science and technology,Southwest Petroleum University,Xindu Sichuan 610500)
出处
《化工管理》
2018年第23期17-19,共3页
Chemical Engineering Management
关键词
工程地质
瓦斯运移规律
裂缝发育
数值模拟
Engineering geology
Gas migration law
Fracture development
numerical simulation
