| Due to the development in computer technology, numerical method such as finite element method has become a powerful tool to provide efficient solutions for several complex structures. In this thesis, the stress and the displacement in the surrounding rock during different excavation phases are computed through elastic numerical analysis.The principal laws of elastic and elasto-plastic materials are presented. Formulation of 2-D isoparametric quadrilateral element is done for finite element analysis. A two-dimensional finite element program, in DIGITAL Visual Fortran Version 6.0 language, is developed for the numerical computation. Due to time limit, elastic modeling is adopted while writing program. Illustrative example is shown to demonstrate its validity.Finally, the program computes the stress and displacement of the surrounding rock around the underground caverns of the Tianhuangping pumped-storage project in all the excavation phases. The Contour diagrams for the principal stresses are drawn by using surfer 7.0 software for the summarization of the stress distribution. The results obtained are reasonable.
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