Numerical modeling for the coupled thermo-mechanical processes and spalling phenomena in Aspo Pillar Stability Experiment (APSE)

被引：16
|
作者：
Koyama, T. [1 ]
Chijimatsu, M. [2 ]
Shimizu, H. [3 ]
Nakama, S. [4 ]
Fujita, T. [4 ]
Kobayashi, A. [5 ]
Ohnishi, Y. [6 ]
机构：
[1] Kyoto Univ, Dept Urban Management, Kyoto, Japan
[2] Hazama Corp, Tokyo, Japan
[3] Tohoku Univ, Inst Fluid Sci, Sendai, Miyagi, Japan
[4] Japan Atom Energy Agcy, Tokai, Japan
[5] Kansai Univ, Fac Environm & Urban Engn, Osaka, Japan
[6] Kyoto Univ, Kyoto, Japan
来源：
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING | 2013年 / 5卷 / 01期
关键词：
Coupled thermo-mechanical (TM); processes; Aspo Pillar Stability Experiment (APSE); Excavation disturbed/damaged zone (EDZ); Finite element method (FEM); Distinct element method (DEM);
D O I：
10.1016/j.jrmge.2013.01.001
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
In this paper, the coupled thermo-mechanical (TM) processes in the Aspo 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. (C) 2013 Production and hosting by Elsevier B.V. on behalf of Institute of Rock and Soil Mechanics, Chinese Academy of Sciences.
引用
收藏
页码：58 / 72
页数：15
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