摘要
对废弃矿井进行改造用于压氢储能,可实现废弃资源的利用和氢气的大规模安全存储。建立废弃矿井压氢储能热-流-固耦合分析理论框架,通过已有解析解对数值模型进行验证,针对某矿废弃矿井进行三维建模研究,并对其压氢储能过程中的热-流-固响应特征及损伤特性进行分析。研究结果表明:所建立的废弃矿井压氢储能热-流-固耦合理论框架可精细化表征压氢储能硐室的多场耦合响应;进行改造后的废弃矿井硐室极限存储压力明显高于未改造废弃矿井的极限压力;由于巷道围岩受锚杆索支护影响,硐室岩石表面的损伤整体呈现斑点状;储能硐室围岩塑性区发育方向向下;硐室内表面位移同时向径向和环向发展,在裂纹萌生时发生张拉裂纹、剪切裂纹和扭转裂纹;在联络巷和大巷交界处存在较大温度梯度和气体压力梯度,温度梯度波动范围较小,约为1 m;大巷温度梯度为-25.8~48.8 K/m,联络巷温度梯度为-22.8~43.8 K/m;气体压力梯度约为2 000 Pa/m,其影响范围较大,约为7.5 m。
Renovating abandoned mines for compressed hydrogen energy storage can enable the utilization of waste resources and safety of large-scale storage of hydrogen.A theoretical framework of thermo-hydro-mechanical(THM)coupling for compressed hydrogen energy storage in abandoned mines is established.The numerical model is validated by using a previous analytical solution.A three-dimensional modeling study on an abandoned mine is conducted to analyze the THM responses and damage characteristics during compressed hydrogen energy storage.The study indicates that the established theoretical framework of THM coupling for compressed hydrogen in abandoned mines can be used for precisely describing the multi-field responses of caverns for compressed hydrogen energy storage.The ultimate storage pressure of the abandoned mine cavern after modification is significantly higher than that of the unmodified abandoned mine.Because the tunnel surrounding rock is affected by the support of anchor cables,the overall damage on the surface of the cavern rock appears mottled.The plastic zone in the surrounding rock of the energy storage cavern evolves downward.Radial and hoop displacements are observed on the cavern surface.Upon crack initiation,tensile,shear,and torsional cracks develop.Relatively high temperature and pressure gradients are observed at the junction between the lane and the main lane.The temperature gradient has an influence range of approximately 1 m.The temperature gradient ranges from−25.8 K/m to 48.8 K/m in the main lane and from−22.8 K/m to 43.8 K/m in the contact lane.The pressure gradient has a relatively large influence range of approximately 7.5 m,with a gradient of 2000 Pa/m.
作者
刘瑞
周舒威
秦世康
徐英俊
何修涵
冯建业
LIU Rui;ZHOU Shu-wei;QIN Shi-kang;XU Ying-jun;HE Xiu-han;FENG Jian-ye(College of Civil Engineering,Tongji University,Shanghai 200092,China;State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China;Key Laboratory of Xinjiang Coal Resources Green Mining of Ministry of Education,Xinjiang Institute of Engineering,Urumqi,Xinjiang 830023,China)
出处
《岩土力学》
北大核心
2025年第S1期454-466,共13页
Rock and Soil Mechanics
基金
国家自然科学基金优秀青年科学基金(海外)(2021)
国家自然科学基金面上项目(No.52278408)
中央高校基本科研业务费专项资金(No.22120240146)
关键词
压氢储能硐室
热-流-固耦合
废弃矿井
响应特征
相场法
compressed hydrogen energy storage cavern
thermo-hydro-mechanical(THM)coupling
abandoned mines
response characteristics
phase field method
