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内衬式地下洞室群氢能存储隆起破坏机制分析

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内衬式地下洞室群的隆起破坏机制分析对于提高氢气存储容量和储库安全性具有重要意义.基于Hoek-Brown强度准则和极限分析上限方法,推导分层岩体中内衬式地下洞室群的隆起破坏线函数,建立极限内压(Pu)的表达式,将理论分析结果与有限元软件计算结果进行对比分析,并在此基础上探讨洞室群形状/布局参数对Pu和隆起破坏线的影响规律.结果表明:Pu理论解与数值解的误差范围处于1.57％～2.20％范围,且隆起破坏范围基本一致;Pu与附加荷载和洞室间距成正比,与洞室半径成反比,且对附加荷载的敏感性最高,半径次之,对洞室间距的敏感性最低;分层界面处各隆起破坏线间的水平距离与盖层厚度成正比;地面处水平隆起破坏范围间的差距与盖层厚度成正比;在内衬式洞室群库址选择时,可将土体黏聚力和内摩擦力作为安全储备,并综合考虑洞室半径对Pu和氢气容量的影响,同时根据隆起破坏范围规避地质构造缺陷区域.研究成果对于分层岩体中内衬式地下洞室群氢能存储库址选择、洞形设计具有指导意义.
Analysis of uplift failure mechanism for underground lined rock caverns in hydrogen energy storage
The analysis of uplift failure mechanism for underground lined rock caverns is of significant importance for improving the storage capacity and safety of hydrogen.In this paper,the functions of the uplift failure lines in layered rock formations and the expressions of critical uplift pressure(Pu)are derived based on the Hoek-Brown strength criterion and the upper bound method of limit analysis.Subsequently,the analytical solutions are compared with numerical simulations.On this basis,the influence laws of shape and layout parameters of the caverns on the Pu and uplift failure lines are investigated.The results show that the error range of Pu between the theoretical and numerical solutions are within the range of 1.57％-2.20％,and the ranges of uplift failure are essentially the same.Pu is directly proportional to the additional loads and cavern spacing,while inversely proportional to the cavern radius.Besides,Pu exhibits the highest sensitivity to the additional loads,followed by the cavern radius,while the lowest sensitivity to the cavern spacing.The horizontal distances between the uplift failure lines at the layered interface are directly proportional to the thickness of the rock layers.Similarly,the gaps between the horizontal uplift failure ranges at the surface are also directly proportional to the thickness of the rock layers.In the selection of the storage sites of lined rock cavers,the cohesion and internal friction of soil can be considered as the safety reserve.Additionally,the influence of the cavern radius on Pu and the capacity for hydrogen storage should also be comprehensively considered.Furthermore,sites with geological tectonic defects should be avoided based on the range of uplift failure lines.The research results hold significant guidance for the selection of hydrogen energy storage sites and the design of cavern shapes in layered rock formations within lined rock caverns.

underground engineeringhydrogen energy storagelined underground rock cavern groupuplift failureHoek-Brown strength criterionlimit analysis

邱凯、李树忱、刘日成、刘众众、王宗昊

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中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州 221116

中国矿业大学力学与土木工程学院,江苏徐州 221116

山东大学齐鲁交通学院,山东济南 250002

地下工程 氢能存储 内衬式地下洞室群 隆起破坏 Hoek-Brown强度准则 极限分析

江苏省科技厅科技项目-碳达峰碳中和科技创新专项资金项目中国工程院战略咨询项目

BK202200252022-XZ-51-3

2024

10.13722/j.cnki.jrme.2023.0285

岩石力学与工程学报
中国岩石力学与工程学会

岩石力学与工程学报

CSTPCD北大核心
影响因子：2.589
ISSN：1000-6915
年,卷(期)：2024.43(2)
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