个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职:President of international exchange committee of the Chinese Society of Rock Mechanics and Engineering CSRME
其他任职:国际岩石力学与岩石工程学会(ISRM)中国国家小组副主席
性别:男
毕业院校:东北大学
学位:博士
所在单位:土木工程系
办公地点:综合实验四号楼330
联系方式:tca@mail.neu.edu.cn
NUMERICAL SIMULATION OF UNLOADING VELOCITY INFLUENCING STABILITY OF SOLID FLUID SURROUNDING ROCK
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论文类型:会议论文
发表时间:2009-01-01
收录刊物:CPCI-S
页面范围:915-920
摘要:The rock mass of underground engineering excavation is a dynamic effect problem, especially in geological zones with solid-fluid interaction in high stress fields. The dynamic excavation should induce the coupling adjustment of both solid framework stress fields and pore pressures of liquids. It is difficult to get these analytical computing results with laboratory testing. This paper contains numerical simulations for solid-fluid surrounding rocks in dynamics unloading conditions using the Lagrange soft code-FLAC. The time course regulations of tangential stress, radial stress, and pore water pressure with dynamic unloading have been found, and the pore water pressure's effect on stress disturbance of unloading has been summarized. While using the dynamic effect according to three different unloading velocities, the paper simulates and compares the stress and pore pressure time course lines of character points respectively while creating the distribution contour maps of pore pressure and plastic zones. The simulation result states that unloading velocity has a significant effect on solid-fluid rock. The faster the unloading velocity, the larger the degree of rock destruction will occur.