Abstract: To investigate the characteristics and mechanisms of strain-structural plane slip rockburst,a high-pressure and servo true-triaxial testing machine was used to conduct rockburst tests on granite with prefabricated folded fissure under true-triaxial with single face unloading.The abovementioned study focus on the characteristics of strain-plane slip rockburst and the evolution law of energy and acoustic emission(AE) during rockburst of prefabricated folded fissure granite.The results indicate that as the injection angle of the prefabricated fissure increases,the crater size of the strain-structural plane slip rockburst and the overall ejection velocity of the particles also increase.Simultaneously,the number of cracks on the left and right adjacent surfaces of the unloading surface,as well as the extent of crack propagation,obviously increase;The debris generated during the rockburst process mainly are coarse particles,and the mass proportion of coarse debris is positively correlated with the injection angle of fissure;The AE ringing count increases sharply when a rockburst is about to occur,and reaches its maximum value when the rockburst occurs.The proportion of AE ringing count and absolute energy both exceeds 75% after unloading,and this proportion gradually increases with the injection angle of the prefabricated fissure.The overall ejection failure of the strain-structural plane slip rockburst is more severe;With the increase of the injection angle,the duration of crack propagation in the granite specimen after unloading significantly increases.At the same time,the high-density area of RA-AF shows an increasing trend,and the tensile cracks on the left and right adjacent surfaces of the unloading surface significantly increases.