Numerical modeling for the coupled thermo-mechanical processes and spalling phenomena in äspö pillar stability experiment (APSE)

T. Koyama, M. Chijimatsu, H. Shimizu, S. Nakama, T. Fujita, A. Kobayashi, Y. Ohnishi

研究成果: Article査読

20 被引用数 (Scopus)

抄録

In this paper, the coupled thermo-mechanical (TM) processes in the Äspö 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.

本文言語English
ページ(範囲)58-72
ページ数15
ジャーナルJournal of Rock Mechanics and Geotechnical Engineering
5
1
DOI
出版ステータスPublished - 2013 2月

ASJC Scopus subject areas

  • 地盤工学および土木地質学

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