压缩空气储能电站大罐式地下内衬硐库上覆岩体稳定性分析  

Analysis of the stability of the overlying rock mass for silo type lined rock caverns in compressed air energy storage

作　　者：孙冠华[1,2,3] 易琪 于显杨 石露 马洪岭[1,2] 罗红明 SUN GuanHua;YI Qi;YU XianYang;SHI Lu;MA Hongling;LUO HongMing(State Key Laboratory of Geotechnical Mechanics and Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China;University of Chinese Academy of Sciences,Beijing 100049,China;Ordos Research Institute of Energy,Peking University,Ordos 017000,China)

机构地区：[1]中国科学院武汉岩土力学研究所,武汉430071 [2]中国科学院大学,北京100049 [3]北京大学鄂尔多斯能源研究院,鄂尔多斯017000

出　　处：《中国科学：技术科学》2024年第12期2377-2391,共15页Scientia Sinica(Technologica)

基　　金：湖北省自然科学基金(三峡创新发展联合基金)重点项目(批准号:2022CFD031,2024AFD361);国家自然科学基金青年科学基金项目(批准号:12302507);中国电力工程顾问集团有限公司重大科技专项(批准号:DG3-G01-2023)资助。

摘　　要：随着新能源行业的快速发展,为满足能源存储的需求,压缩空气储能电站特别是其大罐式地下内衬硐库设计与建设成为了研究和实践的热点.硐库的上覆岩体稳定性是确保其安全运行的核心问题.采用Mohr-Coulomb强度准则,基于岩体极限应力场将大罐式地下内衬硐库潜在失稳模式归结为三维常微分方程组的初值问题,并给出了求解方法.与物理模型试验结果对比分析,验证了方法的可靠性.进一步,建立了极限受力状态下的盖层被动岩土压力抗剪力学三维模型.该模型可用于计算安全系数,可量化评估覆岩体稳定性.参数分析结果表明侧压力系数对潜在破裂面形态影响显著,其次则为内摩擦角,较大的侧压力系数更有利于稳定性.对安全系数有显著影响的参数为埋深和最大储气压力.研究分析为大罐式地下硐库设计提供了关键的设计参数参考,以确保其稳定性和安全性.With the rapid development of the new energy industry and to meet the needs of energy storage,the design and construction of compressed air energy storage(CAES),especially their large underground storage caverns,have become a hot topic in research and practice.The stability of the overlying rock mass is the core issue to ensure their safe operation.By adopting the Mohr-Coulomb strength criterion and basing on the limited stress field of the rock mass,the potential instability modes of shallow buried silo type lined rock caverns(LRC)are reduced to the initial value problem of a set of three-dimensional ordinary differential equations,and a solution method is provided.The reliability of this method has been verified through comparison and analysis with physical model experiment results.Furthermore,a three-dimensional model of passive geostatic pressure under shear mechanics in the limit stress state has been established,which can be used to calculate the safety factor,thereby quantitatively evaluating the stability of the overlying rock mass.Parameter analysis results show that the in-situ stress ratio significantly affects the potential fracture face morphology,followed by the internal friction angle,revealing that a in-situ stress ratio is beneficial for stability.The parameters that significantly affect the safety factor are the burial depth and the maximum air storage pressure.The research analysis provides key design parameter references for the design of large underground silo type LRC to ensure their stability and safety.

关 键 词：压缩空气储能 地下硐库 储气库 稳定性 

分 类 号：TM73[电气工程—电力系统及自动化] TK02[动力工程及工程热物理]