摘要
废弃矿井的综合开发利用是实现“双碳”目标的重要组成部分,而地下空间优化改造压气储能地下储气库是实现这一目的的重要技术途径。以某废弃石膏矿井为工程依托,通过理论分析、数值模拟等技术手段,验证地下储气库建设的可行性。结果表明:“钢衬+围岩”联合支护作用形式可以使得围岩充分发挥自身承压作用,提高支护性能;钢衬厚度30 mm、储气压力6.5 MPa时,在钢衬作用下围岩变形由1.47 cm降低至1.18 cm;与高储气压力(8.0 MPa)相比,较小的储气压力(6.5 MPa)使得钢衬Mises应力均处于许用应力范围内,超过许用应力的巷道长度仅占12.25%;设计理想储气库优化方案,提出了“衬砌+钢衬+围岩”联合承载设计理念,改良原有硐室硐型,通过圆台理论和有限元方法验证了优化后的储气效果。该技术方案的提出与验证,可极大降低储气库对围岩稳定性、矿区地质构造的选址要求,有效改善了围岩应力环境,为废弃矿井压气储能技术发展提供新思路,具有大规模推广应用的潜力。
The comprehensive development and utilization of abandoned mines is an important part of achieving the goal of'double carbon',and the optimization and transformation of underground space for underground gas storage is an important technical way to achieve this goal.Based on an abandoned gypsum mine,the feasibility of underground gas storage construction is verified by theoretical analysis,numerical simulation and other technical means.The results show that the combined support form of'steel lining+surrounding rock'can make the surrounding rock give full play to its own pressure-bearing effect and improve the support performance.When the thickness of the steel lining is 30 mm and the gas storage pressure is 6.5 MPa,the deformation of the surrounding rock under the action of the steel lining is reduced from 1.47 cm to 1.18 cm.Compared with the high gas storage pressure(8.0 MPa),the smaller gas storage pressure(6.5 MPa)makes the Mises stress of the steel lining within the allowable stress range,and the length of the roadway exceeding the allowable stress only accounts for 12.25%.The optimization scheme of ideal gas storage is designed,and the joint bearing design concept of'lining+steel lining+surrounding rock'is put forward.The original chamber type is improved,and the optimized gas storage effect is verified by the round table theory and the finite element method.The proposal and verification of the technical scheme can greatly reduce the site selection requirements of the gas storage for the stability of the surrounding rock and the geological structure of the mining area,effectively improve the stress environment of the surrounding rock,and provide new ideas for the development of compressed air energy storage technology in abandoned mines.It has the potential for large-scale application.
作者
刘士奇
王环玲
周勇
程志超
池明波
LIU Shiqi;WANG Huanling;ZHOU Yong;CHENG Zhichao;CHI Mingbo(Geotechnical Research Institute,Hohai University,Nanjing 210098,China;Powerchina Huadong Engineering Corporation Limited,Hangzhou 311122,China;China Academy of Safety Science and Technology,Beijing 100012,China)
出处
《金属矿山》
北大核心
2025年第8期193-200,共8页
Metal Mine
基金
国家重点研发计划项目(编号:2018YFC1508501)
国家自然科学基金项目(编号:52374139)。
关键词
废弃矿井
地下空间利用
压气储能
联合支护
储气压力
钢衬
abandoned mine
underground space utilization
compressed air energy storage
joint support
gas storage pressure
steel lining
