| The paper,based on the national strategic oil reserve project,analyzes the stability of surrounding rock of Zhanjiang national oil reserve of underground cavern,considering meteorological hydrology,topography,lithology,geological structure,ground stress and rock mechanics parameters.The paper based on evaluation theory of Q system,combine RMR with BQ classification method and use FLAC3 D numerical simulation to deal with tunnel engineering geological conditions data.Analysis of specific contents are as follows:(1)the overall stability analysis of surrounding rock stability of caverns,including: stability of cavern group,the main axis direction,determine the cavern spacing optimization analysis,shaft and connecting parts of cavern stability analysis and local stability analysis of surrounding rock.(2)optimization of the buried depth of cavern group: including the determination of the depth of the main cavern according to the rock mass quality and use the numerical simulation to get the buried depth of the main cavern.(3)analysis of rock burst.To sum up,it is stable to construct of surrounding rock analysis.According to the simulation results,the main cavern principal axis of N10° E direction is more appropriate;the main cavern cavern top elevation is less than-80m;cavern excavation of the local stress concentration,slight rock burst may occur. |
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