Research on rock damage evolution and acoustic emission characteristics under uniaxial loading

This paper obtains the acoustic emission characteristics such as time sequence of acoustic emission events, time series of accumulative event number and etc. during the process of rock damage under full stress-train through research on acoustic emission characteristics of two kinds of different rock specimens during the damage process under uniaxial loading, and analyzes the internal relations and characteristic laws between rock damage fractures in different stages and acoustic emission parameters. The research shows that the acoustic emission information reflects that the internal fracture damage condition of the rock is closely related to the densification of its internal initial fissure and the evolution process of new fissures such as generation, extending, connection and etc. The fitting theoretical stress-strain curve can reasonably reflect the actual stress and strain and damage evolution features of the rock through the acoustic emission event parameters, which has extremely important theoretical value and practical significance to the prediction of the process of rock damage and failure.