(1. School of Mining Engineering，North China University of Science and Technology，Tangshan，Hebei 063009，China；
2. Key Laboratory of Mining and Safety Technology of Hebei Province，North China University of Science and Technology，Tangshan，Hebei 063009，China)
Abstract：Uniaxial compression AE test of granite was carried out. The energy，dominant frequency and amplitude of dominant frequency of AE signal in the process of granite burst were extracted to study the three kinds of coupling relationships between the rupture length and energy，between the energy and amplitude of dominant frequency and between the energy and dominant frequency. The correspondence between the rupture scale and AE signal characteristics(energy，amplitude and dominant frequency) was discussed in terms of energy. The variation of AE signal corresponding to the different rupture scales in the course of rock fracture was the focus of the study. The AE precursor of rock burst was investigated. Four modes of AE signals in the process of granite rupture were found，including the low frequency and high amplitude，the low frequency and low amplitude，the intermediate frequency and low amplitude，and the high frequency and low amplitude. In the process of granite rupture，the characteristics of large scale fracture AE was characterized by the low frequency，high amplitude and high energy，which corresponded to the AE signals of low frequency and high amplitude. The AE characteristics of small scale rupture showed the low amplitude and low energy，coexistence of the low，medium and high dominate frequency，corresponding to the three modes of AE signals：the low frequency and low amplitude，the intermediate frequency and low amplitude，and the high frequency and low amplitude. There are three modes of AE signals：the intermediate frequency and low amplitude，the high frequency and low amplitude and the low frequency and high amplitude，which are suitable as the main signal source for the prediction of the rupture of granite. The characteristics of the precursor are as follows：the intermediate and high frequency low amplitude signals disappear gradually，and the low frequency high amplitude signals appear，which is the phenomenon of the medium and high frequency low amplitude signal being quiet and the low frequency high amplitude signal being not quiet. The precursor response coefficient of the high frequency low amplitude and low frequency high amplitude signal is 0.2，and the one of the intermediate frequency low amplitude signal is 0.14. The precursor of response time of high frequency low amplitude and low frequency high amplitude is earlier.
张艳博1，2，梁 鹏1，2，田宝柱1，2，姚旭龙1，2，孙 林1，2，刘祥鑫1，2. 花岗岩灾变声发射信号多参量耦合分析及主破裂前兆特征试验研究[J]. 岩石力学与工程学报, 2016, 35(11): 2248-2258.
ZHANG Yanbo1，2，LIANG Peng1，2，TIAN Baozhu1，2，YAO Xulong1，2，SUN Lin1，2，LIU Xiangxin1，2. Multi parameter coupling analysis of acoustic emission signals of granite disaster and the precursor characteristics of the main rupture. , 2016, 35(11): 2248-2258.
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2016, Vol. 35 
