A semi-infinite beam theoretical model on predicting rock slope subsidence induced by underground mining  

作　　者：LIU Xinrong WANG Nanyun ZHONG Zuliang DU Libing LIANG Erwei 

机构地区：[1]School of Civil Engineering,Chongqing University,Chongqing 400045,China [2]State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing 400044,China [3]Key Laboratory of New Technology for Construction of Cities in Mountain Area of Ministry of Education,Chongqing 400045,China [4]School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500,China

出　　处：《Journal of Mountain Science》2024年第2期633-647,共15页山地科学学报（英文）

基　　金：supported by the National Natural Science Foundation of China(No.52074042);National Key R&D Program of China(No.2018YFC1504802).

摘　　要：When the mining goaf is close to the cliff,rock slope subsidence induced by underground mining is significantly affected by its boundary conditions.In this study,an analytical method is proposed by considering the key strata as a semi-infinite Euler-Bernoulli beam rested on a Winkler foundation with a local subsidence area.The analytical solutions of deflection are derived by analyzing the boundary and continuity conditions of the cliff.Then,the analytical solutions are verified by the results from experimental tests,FEM and InSAR,respectively.After that,the influence of changing parameters on deflections is studied with sensitivity analysis.The results show that the distance between goaf and cliff significantly affects the deflection of semi-infinite beam.The response of semi-infinite beam is obviously determined by the length of goaf and the bending stiffness of beam.The comparisons between semi-infinite beam and infinite beam illustrate the ascendancy of the improved model in such problems.

关 键 词：Key strata Mining rock slope Winkler foundation Euler-Bernoulli beam Subsidence prediction 

分 类 号：TU457[建筑科学—岩土工程] TD327[建筑科学—土工工程]