高地应力地区地下洞室施工的几个问题探讨

Discussion on A Few Problems of Construction of Underground Chambers and Caverns in the Areas with High In-situ Stress

通过锦屏电站工程实践中出现的高地应力问题,过对地应力级别的判别与影响因素分析,岩爆预测方法与防治控制措施,洞室各种硬度岩体的大变形问题的弹塑原理与控制机理等使用一些基本理论来进行分析,高地应力条件下各种大变形问题的弹塑性理论原理和蠕变破坏理论的分析,探讨工程措施的基本原理与基本处理方法,并总结了几种关键的处理方法,对高地应力区域工程设计与施工提供参考。

This paper analyzes the factors that determine magnitude of in - situ stress and Its influence, the rock burst prediction method and its prevention and control measures, elastoplasticity causing principle and control mechanism of large deformation of rock mass with various hardness, theory and principle of elastoplasticity and creepage failure of various large rock mass due to defomration under high in - situ stress by using the basic theories based on the high in - situ stress occurring in construction of the Jinping hydropower project. The paper also probes into both basic principles of engineering measures and basic treatment methods and finally summarizes a number of key treatment methods, which give a reference to both design and construction of an underground chamber/cavern located in the zone with high in - situ stress.