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为评价压气储能内衬洞室的密封性及围岩稳定性,提出一种估算洞室空气泄漏率和围岩应力、位移的方法。该方法以一种计算压气储能洞室温度和压力的简化解为基础,结合高分子材料气体渗透方程和多孔介质径向流方程,还采用无限大平板孔口问题的弹性力学解,通过迭代计算的方式求解出洞室空气泄漏率和围岩应力、位移。通过5个算例对迭代计算方法进行验证,结果表明:该方法可以较为准确地估算压气储能内衬洞室的空气泄漏率以及洞室围岩的应力、位移,并且便于在计算机中编程实现,计算速度优于数值模拟,可以直接应用在压气储能内衬洞室研究的初始阶段(如选址、初设阶段),也可与精细数值模拟的结果相互印证,为后续研究提供指导。
In order to evaluate the tightness of the cavern and the stability of the surrounding rock, a method of estimating the air leakage rate in the cavern and the stress and displacement of the surrounding rock is proposed. Based on a simplified solution to calculate the temperature and pressure in a cavern gas chamber, the method uses the elastic mechanics solution of the orifice problem of infinite flat plate combined with the gas permeation equation of polymer materials and the radial flow equation of porous media. Through the iteration Calculated way to solve the cavern air leak rate and surrounding rock stress and displacement. The five examples are used to verify the iterative method. The results show that the proposed method can accurately estimate the air leakage rate and the stress and displacement of the surrounding rock mass of the cavern, and can be easily programmed in the computer , The calculation speed is better than the numerical simulation, which can be directly applied in the initial stage of research (such as site selection and initial setting) of the LPG lining chamber or with the results of the fine numerical simulation to provide guidance for the follow-up study.