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原地应力状态和有关岩石力学参数的测定,对于抽水蓄能电站地下厂房和高压输水管道的设计,有很重要的意义.我们利用轻便水压致裂应力测量方法,在广州抽水蓄能电站测出最大水平主应力方向为北西向。三向主应力随深度呈线性增加趋势.得出不同结构性质的花岗岩破裂压力、抗拉强度等有关参数,为工程设计提供了重要依据.
The determination of the in-situ stress state and related rock mechanics parameters is of great significance for the design of underground powerhouses and high-pressure water transmission pipelines for pumped-storage power stations. We use the portable hydraulic fracturing stress measurement method at the Guangzhou pumped-storage power station. The direction of maximum horizontal principal stress is measured in the northwest direction. The three-dimensional principal stress increases linearly with depth. The parameters such as fracture pressure and tensile strength of granites with different structural properties are obtained, which provides an important basis for engineering design.