岩石单轴压缩变形场演化的声发射特征研究

doi:10.13722/j.cnki.jrme.2016.0973

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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.

Key words： rock mechanics deformation localization acoustic emission(AE) digital speckle correlation methods quiet period

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	Articles by authors
	SONG Yimin1
	XING Tongzhen1
	ZHAO Tongbin2
	ZHAO Zexin1
	GAO Pingbo1

Cite this article:

SONG Yimin1,XING Tongzhen1,ZHAO Tongbin2, et al. Acoustic emission characteristics of deformation field development of rock under uniaxial loading[J]. , 2017, 36(3): 534-542.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2016.0973 OR http://www.rockmech.org/EN/Y2017/V36/I3/534

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