| Summary: | 碩士 === 國立高雄第一科技大學 === 營建工程研究所 === 100 === Nuclear energy has been an important selection of the electric power resources for our country for many years. However, the radioactive waste, which should be completely isolated from human’s life circle, has been also produced. The Deep Geologic Disposal method has been widely accepted as the most efficient method for the permanent disposal of the radioactive waste. From the geotechnical engineer’s point of view, the safety of deep underground deposition structures, sustaining the self-weight pressure from surrounding rock masses and additional stress caused by geological structure, has to be considered in advance.
In this research, a 3-D numerical analysis was conducted on the concept of the Deep Geologic Disposal method for nuclear waste using the FLAC3D（Fast Lagrangian Analysis of Continua in 3 Dimensions）software originally developed by the US ITASCA company in 1997. The numerical simulation and its analysis focused on capturing the influence of the mechanical behavior at the intersection of deposition tunnel and disposal holes during the construction period. The mechanical properties of rocks employed in this research are assumed as a perfectly elasto-plastic material following Mohr-Coulomb failure criterion. In the stability including parametric sensitivity study of the disposal site, a variety of rock quality expressed by RMR and coefficients of lateral pressure, K, were adopted.
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