A series of multistage creep tests under different confining pressures with acoustic emission monitoring have been performed to\ninvestigate the deformation characteristic and failure process of cracked granite during creep. The critical axial strain of cracked\nsample showed an increasing tendency with the increase of confining pressure. In contrast, critical lateral strain experienced a\nprocess of descending first at low confinement and then remaining nearly constant at high confinement. Compared with loadingcracked\nspecimen, smaller critical axial strain, greater critical lateral strain, and higher lateral creep strain rate were found for\nunloading-cracked specimen. Based on the spatial and temporal distribution of acoustic emission events, the cracking process\nduring creep was analysed. The AE events with high energy are mainly concentrated at the final fracture area of the specimen. The\nhigher the confining pressure, the more the AE events with low energy. Compared with the loading-cracked specimen, the\npercentage of AE events with high energy is relatively small for the unloading-cracked specimen.
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