Numerical simulations and analysis for the sp pillar stability experiment, 1; Continuum based approaches using finite element method and comparison with other analysis model

Chijimatsu, Masakazu*; Koyama, Tomofumi*; Shimizu, Hiroyuki*; Nakama, Shigeo ; Fujita, Tomoo 

DECOVALEX-2011 is an international cooperation project for enhancing the numerical models of radioactive waste repositories. In Task B of DECOVALEX-2011 project, the failure mechanism during excavation, heating and destressing processes observed in the sp pillar stability experiment (APSE), which carried out at the sp Hard Rock Laboratory by the Swedish Nuclear Fuel and Waste Management Company (SKB), were simulated using Finite Element Method. When the calibrated parameters were used, simulation results agree qualitatively well with the experimental results. Therefore, it can be said that the spalling phenomenon is expressible even by the application with the continuum model by the use of the suitable parameters.