页岩单轴压缩破坏过程中声发射能量分布的统计分析

doi:10.13722/j.cnki.jrme.2015.0699

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Abstract The energy release of brittle rocks failure under loading is critical process. In order to have a more clear understanding about the brittle rocks failure process and the rule of energy release，shale under uniaxial compression test has been carried in laboratory，and the loading rates were 0.01，0.1，0.5 mm/min respectively. During the whole loading process, acoustic emission(AE) parameters have been collected，and the probability density function(PDF) of absolute AE energy was calculated. PDFs critical exponents were estimated by the maximum likelihood estimation method. The results showed：(1) The PDF of absolute AE energy under different loading rate in seven orders of magnitude ranges conformed to the power law distribution. (2) The critical exponent r calculated by the maximum likelihood estimates method had an optimal range of stability，which characterized the power law distribution accurately. (3) The critical exponents of one span and the whole process were similar with each other，which allowed one use the AE information in the preliminary stage to study the energy release during final collapse.

Key words： rock mechanics shale uniaxial compression acoustic emission energy maximum likelihood

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	Articles by authors
	JIANG Deyi
	XIE Kainan
	JIANG Xiang
	CHEN Jie
	YUAN Xi

Cite this article:

JIANG Deyi,XIE Kainan,JIANG Xiang, et al. Statistical analysis of acoustic emission energy distribution during uniaxial compression of shale[J]. , 2016, 35(S2): 3822-3828.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.0699 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS2/3822

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