水力压裂后，当微裂缝闭合时初始损伤带的诱导应力导致围岩应力重新分布。
The induced stress of initial damage zone results in the redistribution of surrounding rock stress when the micro-crack closes after hydraulic fracture.
利用弹塑性有限元模型模拟多层圆筒在超压处理压力下，卸载后以及重新加载设计压力时的应力分布。
Stress distribution in the condition of SPT loading, unloading and design pressure reloading was simulated using elastic-plastic finite element model.
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