金坛盐岩储气库运营模型试验研究

针对盐岩重度低、低弹强比、高流变性等强度与变形特性，研制出与金坛盐矿盐岩的力学行为较为相似的材料配方；采用地质力学模型试验技术，开展金坛盐岩储气库运行稳定性的模拟试验，研究腔体在周期性注、采气作用下的变形特点与力学分布规律。根据模型试验结果，采用盐岩非线性蠕变损伤本构模型，结合金坛盐岩储气库长期运营进行数值模拟，并与物理模型试验结果进行对比，研究分析储气库围岩在循环加卸载下的力学响应特点与盐岩溶腔的长期运营稳定性，得到了在周期性加卸载作用下腔体围岩蠕变变形的特点与规律，研究表明相似模型试验技术可以有效地应用于盐岩储气库运营长期稳定性的研究，其结果对盐岩储气库的建造与运行具有一定的指导意义和工程应用价值。

A study of model test of Jintan rock salt gas storage’s operation

An analogy recipe used for model test studying of rock salt gas storage, which can simulate the features of rock salt such as lower bulk density, lower modular ratio and larger rheology deformation. Using geomechanic model test technique, Jintan salt mine’s long-term stability and the cavity’s deformation and stress distribution under cyclic internal pressure are studied. A constitutive model which considering damge of rock salt is deduced and employed in Jintan rock salt gas storage’s numerical computation. The result from the numerical computation is checked by the one from the model test. The study indicates that the model test technique is very effective in studying of gas storage’s long-term stability. The damage evolution of rock salt and the creep deformation of the cavity under cyclic loading-unloading is obtained. The result can be used to guide the constrution and production of gas storage in rock salt in China.