盐岩蠕变-疲劳交互损伤模型及深部压气蓄能储气库稳定性分析

项目名称： 盐岩蠕变-疲劳交互损伤模型及深部压气蓄能储气库稳定性分析

项目编号： No.51309234

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 水利工程

项目作者： 马林建

作者单位： 中国人民解放军理工大学

项目金额： 25万元

中文摘要： 压缩空气蓄能发电是一种利用压缩空气介质来蓄能发电的新兴技术。为满足我国市场用电季节性与时段性差异需求，有效地调节电力资源供应，保证供电质量和可靠性，我国盐穴地下压气蓄能电站工程正处于规划和大规模建设当中。本项目拟通过盐岩三轴循环加、卸载试验获得加载应力水平、频率、围压等因素对盐岩不可逆变形及损伤特性影响，揭示盐岩蠕变和疲劳耦合作用机理，建立盐岩蠕变-疲劳交互损伤模型；基于FLAC3D二次开发平台实现新模型的软件嵌入，并通过试件数值试验进行对比验证；进一步，利用蠕变-疲劳交互损伤模型，进行压气蓄能储气库水溶建腔、注气排卤及注采运营全过程精细化数值模拟，对比分析不同运营内压、注采速率、溶腔形状（高径比）及埋深下，储库溶腔围岩应力状态、变形收敛特征及损伤破坏规律，建立高频循环内压作用下盐岩压气蓄能储气库稳定性预测方法，为我国压气蓄能电站设计、建造和运营提供科学决策依据。

中文关键词： 层状盐岩；循环荷载；交互作用；蠕变损伤；数值分析

英文摘要： Compressed air energy storage (CAES) is a new developed technology which utilizes compressed air to storage electricity. In order to fullfill the electricity need during different seasons and periods, to adjust resource supply, and to keep the quality and stability of which, a large number of underground CAES salt cavern stations are being planned and constructed. Based on the triaxial cyclic loading/ unloading test, the effect of stress level、loading frequency and confining pressure on irreversible deformation and damage property of rock salt is studied. The creep-fatigue coupled damage mechanism is revealed with creep-fatigue damage interaction constitutive model. The constitutive model is then implemented into the three dimentional finite difference software FLAC3D and validated through the numerical triaxial compression and muti-stage triaxial creep tests. Based on actural geologic setting of Jintan salt formation, the entire process of water solution, injection-withdrawal operation for deep CAES salt cavern is simulated utilizing the new proposed constitutive model. The impact of inner operating pressure、the injection and withdrawal velocity，the cavern shape (height radius ratio)，and the embedded depth on the stability, tightness and usability of CAES salt cavern will be analyzed in detail. The prediction m

英文关键词： bedded rock salt；cyclic load；interaction；creep damage；numerical analysis