同组软硬煤煤样声发射及分形特征研究

doi:10.13722/j.cnki.jrme.2014.s2.013

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Abstract In order to study of acoustic emission and fractal characteristics of soft and hard coal with same group under uniaxial compression，focusing on group Yi soft and hard coal in Pingmei Group，an experimental study is carried out to investigate the acoustic emission characteristics of soft and hard coal with the same group in Pingmei group by using RMT–150C rock mechanics test system and CDAE–1 acoustic emission instrument，and analyze the fractal characteristics of the acoustic emission count sequence. The results show that phenomenon of the acoustic emission cumulative count surge appears the soft and hard coal samples in failure process under compression uniaxial. The average growth rate is 855.4 of soft coal and the average growth rate is 914.32 of hard coal. Phase space dimension has a certain influence on the correlation dimension，but the effect will be more and more smaller with increasing of the phase space dimension. The fractal dimension is relatively small of acoustic emission cumulative count sequence of the soft and hard coal at the initial loading stage，and at the near peak stress it will reach the maximum value，and then it will appear dump phenomenon，at last it can be used as a forewarning of the instability failure of coal body.

Key words： mining engineering coal sample acoustic emission uniaxial compression fractal correlation dimension

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	Articles by authors
	GAO Baobin1
	2
	3
	LI Huigui1
	3
	LI Lin1
	3
	WANG Xiaolei1
	2
	YU Shuijun1
	3

Cite this article:

GAO Baobin1,2,3, et al. STUDY OF ACOUSTIC EMISSION AND FRACTAL CHARACTERISTICS OF SOFT AND HARD COAL SAMPLES WITH SAME GROUP[J]. , 2014, 33(S2): 3498-3504.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.s2.013 OR https://rockmech.whrsm.ac.cn/EN/Y2014/V33/IS2/3498

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