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In the realm of rock mass project, fatigue failure characteristics of rock under cyclic load have closed realtionship with the long-term stability of rock mass. Acoustic emission (AE) technique can be used to monitor the production of the micro-cracks development and the failure process in the rock test sample continuously and in-real-time, which makes it better than other methods. The experimental results were displayed as follows: AE Count, Energy, Hits roughly have the same characteristics in the rock fatigue damage process. The AE signal of materials such as rock is arised from the damage. Thus, the damage variable expression was established based on AE Count, Energy, and Hits. The accumulative Hits curve was turned into fatigue damage evolution one in this paper, which obviously indicated the characteristic of ‘the three phases development rules’ of irreversible deformation of rock, conforming to the rules of fatigue damage evolution

Acoustic emission characteristic during rock fatigue damage and failure