Numerical study on coupled thermo-mechanical processes in sp Pillar Stability Experiment  

作　　者：Pengzhi Pan Xiating Feng 

机构地区：[1]State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics, Chinese Academy of Sciences

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2013年第2期136-144,共9页岩石力学与岩土工程学报（英文版）

基　　金：the context of the international DECOVALEX Project (DEmonstration of COupled models and their VALidation against EXperiments);grateful to the Institute of Rock and Soil Mechanics, Chinese Academy of Sciences (CAS), China, as one of the Funding Organizations of the project;supported by a grant from the National Basic Research Program of China (No. 2010CB732006);the National Natural Science Foundation of China (Nos. 10972231, 41272349);SKB through its sp Pillar Stability Experiment project

摘　　要：This paper presents a study of the full three-dimensional thermo-mechanical （TM） behavior of rock pillar in,Aspo Pillar Stability Experiment （APSE） using a self-developed numerical code TM-EPCA3D. The transient thermal conduction function was descritized on space and time scales, and was solved by using cellular automaton （CA） method on space scale and finite difference method on time scale, respectively. The advantage of this approach is that no global, but local matrix is used so that it avoids the need to develop and solve large-scale linear equations and the complexity therein. A thermal conductivity versus stress function was proposed to reflect the effect of stress on thermal field. The temperature evolution and induced thermal stress in the pillar part during the heating and cooling processes were well simulated by the developed code. The factors that affect the modeling results were discussed. It is concluded that, the complex TM behavior of Aspo rock pillar is significantly influenced by the complex boundary and initial conditions.This paper presents a study of the full three-dimensional thermo-mechanical （TM） behavior of rock pillar in,Aspo Pillar Stability Experiment （APSE） using a self-developed numerical code TM-EPCA3D. The transient thermal conduction function was descritized on space and time scales, and was solved by using cellular automaton （CA） method on space scale and finite difference method on time scale, respectively. The advantage of this approach is that no global, but local matrix is used so that it avoids the need to develop and solve large-scale linear equations and the complexity therein. A thermal conductivity versus stress function was proposed to reflect the effect of stress on thermal field. The temperature evolution and induced thermal stress in the pillar part during the heating and cooling processes were well simulated by the developed code. The factors that affect the modeling results were discussed. It is concluded that, the complex TM behavior of Aspo rock pillar is significantly influenced by the complex boundary and initial conditions.

关 键 词：Aspo Pillar Stability Experiment （APSE） Elasto-plastic cellular automaton （EPCA） Thermo-mechanical （TM） coupling Thermal conduction Thermal conductivity 

分 类 号：TU458[建筑科学—岩土工程]