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《岩石力学与岩土工程学报(英文版)》 2013-01
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Numerical modeling for the coupled thermo-mechanical processes and spalling phenomena in spPillar Stability Experiment (APSE)

T. Koyama a, , M. Chijimatsu b , H. Shimizu c , S. Nakama d , T. Fujita d , A. Kobayashi e , Y. Ohnishi f a Department of Urban Management, Kyoto University, Kyoto, Japan b Hazama Corporation, Tokyo, Japan c Institute of Fluid Science, Tohoku University, Sendai, Japan d Japan Atomic Energy Agency (JAEA), Tokai, Japan e Faculty of Environmental and Urban Engineering, Kansai University, Osaka, Japan f Kyoto University, Kyoto, Japan  
In this paper, the coupled thermo-mechanical (TM) processes in the sp Pillar Stability Experiment (APSE) carried out by the Swedish Nuclear Fuel and Waste Management Company (SKB) were simulated using both continuum and discontinuum based numerical methods. Two-dimensional (2D) and three-dimensional (3D) finite element method (FEM) and 2D distinct element method (DEM) with particles were used. The main objective for the large scale in situ experiment is to investigate the yielding strength of crystalline rock and the formation of the excavation disturbed/damaged zone (EDZ) during excavation of two boreholes, pressurizing of one of the boreholes and heating. For the DEM simulations, the heat flow algorithm was newly introduced into the original code. The calculated stress, displacement and temperature distributions were compared with the ones obtained from in situ measurements and FEM simulations. A parametric study for initial microcracks was also performed to reproduce the spalling phenomena observed in the APSE.
【Fund】: conducted within the context of the international DECOVALEX Project (DEvelopment of COupled models and their VALidation against EXperiments);; financed by Japan Atomic Energy Agency (JAEA) who was also one of the Funding Organizations of the project;; Christer Anders-son from Swedish Nuclear Fuel and Waste Management Co.(SKB) Sweden
【CateGory Index】: TK12
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