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当前,有关地下洞室围岩稳定性评价理论和围岩压力的计算方法存在着一些问题,其中之一就是设计工作和地质工作有脱节现象。本文目的是把围岩岩体结构、岩石性质、结构面力学特性及洞室几何尺寸等因素,用岩石力学方法求得包括围岩隙跨比在内的判别围岩稳定性的鉴别公式、判别毛洞围岩稳定性的安全隙跨比曲线、计算围岩压力和设计喷锚结构的计算公式。这些公式由于包括了围岩岩体结构特征和洞室几何尺寸在内,因而在一定程度上有助于解决上述设计工作和地质工作脱节的现象。
At present, there are some problems related to the stability evaluation theory of surrounding rock of underground caverns and the calculation method of surrounding rock pressure. One of them is the disconnection between design work and geological work. The purpose of this paper is to use rock mechanics methods to determine the surrounding rock rock mass structure, rock properties, mechanical properties of the structural plane, and the geometrical dimensions of the cavern. The safety clearance gap-span curve for the stability of the surrounding rock of the Maodong cavern, the calculation of the surrounding rock pressure and the calculation formula for designing the spray anchor structure. Because these formulas include the structural features of the surrounding rock mass and the geometry of the caverns, they help to solve the above-mentioned design work and the disconnection of geological work to some extent.