Random Reliability for Opencast Mine Slope Stability with Interaction of Solid and Fluid
The parameters of the rock and soils in the opencast mine with spatial variation is treated as a randoM field. The random field is spatially meshed into random field meshes which in consistence with the finite element mesh. Then the distributive character of the parameters in each elements and the covariance between parameters in different elements are computed with a locally averaging method. The Interaction between the underground water and the rock and soils in the slope is described with the Biot consolidation equations. The coupled process of the solid and fluid interaction is simulated with stochastic finite element method, which computes the distributive character of the stress, the deformation and the pore pressure in the slope. The potential sliding surface is treated as the collection of the elements it crossing through and its limit state function is treated as the sum of the limit state functions of the elements. Then, the reliability index and the corresponding failure probability of the potential sliding surface are computed basing one the theory of reliability. A high lope of a opencast mine is taken as case study, where the reliability index and the corresponding failure probability are computed in both case of coupled and uncoupled process between the underground water and the soils in the slope with random parameters. Computed results prove that failure probability is higher in the coupled case, which is in coincidence with the facts in geotechnical engineering.
random reliability fluid-solid interaction random field local average method stochastic finite element method
He Xiang Liu Jianjun Li Jixiang
Faculty of Civil Engineering, Wuhan Polytechnic University, Wuhan, 430023, China
国际会议
The 3rd International Symposium on Modern Mining & Safety Technology Proceedings(第三届现代采矿与安全技术国际学术会议)
辽宁阜新
英文
1059-1062
2008-08-04（万方平台首次上网日期，不代表论文的发表时间）