Abstract:Experiments on acoustic emission (AE) characteristics of full-regime rock failure are carried out on stiffness test machine (MTS). The mechanical properties of rocks and acoustic emission characteristics,including full-regime curves,AE counts and AE rate,are obtained. The relations among AE counts,AE rate,stress levels,and time are analyzed in detail. The results show that the Kaiser effect does not occur for every rock samples subjected to simple loading. During the initial and late stages of elastic domains,AE counts increase rapidly with the increase of stress level. But when the curve is near to the peak,AE counts obviously drop,which means that there is a relatively tranquil period. The AE rates change dramatically in different stages. In post-peak region,AE events stay evident and the AE characteristics depend on the failure type of rocks.