Acoustic emission characteristics of deformation field development of rock under uniaxial loading
SONG Yimin1，XING Tongzhen1，ZHAO Tongbin2，ZHAO Zexin1，GAO Pingbo1
(1. School of Civil Engineering，North China University of Technology，Beijing 100144，China；2. College of Mining and Safety Engineering，Shandong University of Science and Technology，Qingdao，Shandong 266590，China)
Abstract：This paper concentrates on the acoustic emission(AE) characteristics of deformation field development of red sandstone under uniaxial compression. The digital speckle correlation method was adopted to measure the deformation field. The AE information was monitored by an AE system during the deformation and failure of the rock. The AE characteristics corresponding to the deformation localization and the stretch and dislocation of localization band were studied. The AE ringing counts and the AE energy increase suddenly when the stress drops abruptly. Sometimes，the stress does not drop abruptly when the AE ringing counts and AE energy increase sharply. There is a close correlation between the AE cumulative ringing counts and loading stress curve during the whole loading process，but the stress drop is not proportional to the increment of AE cumulative ringing counts. The development of rock deformation field may not be in a calm stage during the“quiet period”of AE. The size and value of deformation localization band keep increasing in the“quiet period”of AE. The length，the width and the deformation magnitude of the deformation localization band have little effect on the AE energy and AE ringing counts. The stretching rate and dislocation rate of deformation localization band have a great influence on the AE ringing counts and AE energy，especially the sliding of the deformation localization band has greatest effect.
宋义敏1，邢同振1，赵同彬2，赵泽鑫1，高平波1. 岩石单轴压缩变形场演化的声发射特征研究[J]. 岩石力学与工程学报, 2017, 36(3): 534-542.
SONG Yimin1，XING Tongzhen1，ZHAO Tongbin2，ZHAO Zexin1，GAO Pingbo1. Acoustic emission characteristics of deformation field development of rock under uniaxial loading. , 2017, 36(3): 534-542.
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2017, Vol. 36 
