为了研究盐岩在特定环境下的损伤自恢复效应，通过改变盐岩初期损伤度、围压大小与保压时间3个变量分别开展了损伤盐岩保压恢复试验。基于材料破坏的应变控制理论，主要分析了盐岩初期损伤度、围压大小与保压时间3个因素在压力恢复作用下对盐岩应变恢复和损伤愈合进程的影响。试验结果表明：围压可以改变盐岩自恢复能力；盐岩应变恢复可以分为应变快速恢复、减速恢复与缓慢恢复3个阶段，这3个阶段与围压大小、裂隙发育度、时间之间存在密切关系，该恢复趋势呈现出类似负指数型降低趋势；保压时间和围压的增加在一定范围内都可以加强损伤试件的应变恢复效果与损伤愈合能力；盐岩保压期间围压的增加都相对地加快了整体的恢复速率，延长了减速恢复阶段的时间；较大初始损伤的试样虽在保压期恢复速率较高，但并未改变恢复后损伤大小的排序；较大的围压可以促使应变恢复和损伤愈合，但过大的围压容易造成应变假恢复和损伤增加的现象。

The aim of this study is to investigate the damage recovery effect of salt rock under confining pressure conditions. Thus the damage recovery experiments have been performed on the salt rock specimens with different initial damage degrees under different confining pressures and holding time. Based the controlling theory of strain, the effects of the above three factors on the strain and damage recovery are analyzed under compression. The results indicate that the self-recovery ability of salt rock can be changed by confining pressure. The strain recovery process can be divided into three phases: fast recovery, retard recovery and slow recovery which are depending on the confining pressure, degree of growing cracks and holding time . Firstly, it is shown that the strain recovery process can be approximately fitted by a negative exponential function. Secondly, the increases of both holding time and confining pressure are beneficial to the effects of strain and damage recovery to a certain degree. Especially, the increase of confining pressure within the holding time can not only raises the whole recovery rate, but also prolongs the retard recovery stage. Finally, the ranking of damage magnitudes of salt rock specimens remains unchanged, even though the specimen with a higher damage degree has a high recovery rate in the pressure holding time. The high confining pressure can promote the strain and damage recovery of salt rock, but a higher confining pressure may cause the phenomenon of false recovery.