The Stability Of Surrounding Rock Of Underground Gas Storage, Analysis And Research

Underground engineering has become the social trend of development of geotechnical engineering, not only many large-scale engineering and construction on the floor space is a waste of land resources, but also there is a greater security risk. Underground works will also be strong in the energy development project, because the development of China's energy demand. Underground gas storage is the inevitable result of China's energy development, surrounding Rock of stability and support design has become the key technology projects, since it is underground project. Underground gas storage stability of surrounding rock is directly related to the normal use of the gas storage project, which is a question worthy of study and exploration.With the wide range of computer applications in today's society, which will basically be applied in all fields. It has been greatly developed that using a computer simulation of underground works of the rock of stability and support design, there are many of the software which can simulate the stability of surrounding rock of underground works. The finite element method make it more suitable for rock engineering problems as it is in many of the features of its own.This will be an underground gas storage for the calculation of artificial objects, using the finite element analysis method, the stability of underground gas storage issues surrounding a more comprehensive study. In the course of the study is the first theoretical preparation, the underground gas storage are likely to be affected has been studied; then again the region where the geological conditions were introduced; finaly, the numerical calculation and finite element theory was expounded, and the rock under the project area characteristics, using ANSYS finite element software for the underground gas storage in rock stability simulation.In this paper, a detailed analysis of the underground gas storage rock ground conditions, and made a reasonable stady for simulating gas storage, because the rock is in a region between two fracture zones, and many years ago several earthquakes have occurred.However, analysis of the lot is relatively safe, the rock is relatively stable. These results are given realistic boundary conditions, an analysis of the constitutive relationship of rock underground gas storage, and eventually established a model. Through large-scale finite element analysis software ANSYS was the simulation of the gas storage, the simulation results show that the underground gas storage caverns with stress concentration, the rock needs support, in this paper proposed three options for support simulation, and support programs optimized, final selection of the economic rationality, but also to satisfy the stability of underground gas storage requirements of the lining surrounding support program, the whole simulation process, has been selected to optimize support programs are based on practical projects, with a clear purpose and a higher value of the actual project.Underground gas storage projects throughout the simulation is complete, then the underground gas storage rock analysis of adverse factors were the major considerations for the groundwater and creep, two very negative factors surrounding the gas storage. In the groundwater study were calculated at different reduction factors, the gas storage cavern in the stress and displacement, the results showed that the reduction coefficient, the displacement of surrounding rock will be larger; The shape of the gas storage cavern in the rock will have different stability.Finally, this article made a final summary of this article, and this article does not solve the problems and prospects are summarized. In short, the conclusion that the results of this paper the actual construction of the guiding significance, with engineering applications.