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基于对某地下水封洞库库区详细的地质调查和研究,运用块体理论评价围岩块体稳定性。采用块体理论分析方法之一的矢量分析法,分析出地下洞库各开挖面的可动块体,通过力学分析判别出可动块体中的关键块体,计算出其剩余下滑力和失稳形式。结果表明:此地下水封洞库稳定性较好,关键块体主要以结构面②、④单面滑动,且主要分布于洞室顶部。因此施工时应重点监测结构面②、④出露处,同时通过分析研究发现矢量法作为块体理论一种分析方法,能准确分析围岩块体稳定性,对地下水封洞库围岩稳定性评价具有一定的意义,但其在确定关键块体的具体位置,以及对于曲面洞壁块体稳定性分析均有待于进一步完善研究。
Based on the detailed geological investigation and research on a groundwater seal caverns reservoir area, the block theory is used to evaluate the stability of the surrounding rock mass. Using the vector analysis method which is one of the methods of block theory analysis, the movable block of the excavation surface of the underground cavern is analyzed. The key block in the movable block is identified through the mechanical analysis and the residual slip force is calculated Unstable form. The results show that the stability of the groundwater seal cavern is good, and the key blocks slide mainly on the structural planes ② and ④, and are mainly distributed on the top of the cavern. Therefore, the construction should focus on monitoring the structural surface ②, ④ out of place, at the same time through the analysis found that the vector method as a block theory, an analysis method that can accurately analyze the stability of surrounding rock blocks, groundwater closure cavern stability The evaluation is of some significance. However, its exact location in determining the key blocks and the analysis of the stability of the surface of the cave walls are subject to further study.