Stability Analysis of the Surrounding Rock for a Shallow-Buried Large-Span Underground Powerhouse in a Hydropower Project
The block theory is applied to analyze the stability of the surrounding rock for a shallow-buried large-span underground powerhouse in a hydropower project.The results indicate that unstable blocks are primarily distributed in the crown area,and groundwater has a significant impact on block stability.As the seismic parameters increase,the safety factor of the blocks decreases,but the reduction is not substantial.The geostress has a significant impact on the stability of crown blocks.The combined support measures of shotcrete and anchor rods are more effective in reinforcing unstable blocks.
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