多级动荷加载条件下煤岩应力–声发射耦合特性试验

doi:10.13722/j.cnki.jrme.2018.0628

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Abstract

It is a significant task for rock mass stability monitoring to study coupling properties of stress and acoustic emission(AE) of coal and rock fracture under multilevel dynamic loadings. This paper is aiming at revealing relations of stress and AE of coal and rock samples under multilevel dynamic loadings. Stress and AE synchronous data has been obtained from mechanic properties testing system of coal and rock samples under multilevel dynamic loadings. The results show that the accumulation stress of coal and rock under multilevel dynamic loadings is obviously less than the maximal compression stress. Then，multilevel dynamic loadings could induce cracks extension according to the felicity effect of coal and rock. Memory characteristic of rock stress shows obvious felicity effect and the felicity ratio presents a decline trending with the larger level dynamic loadings. Also，fractal dimension between stress and AE has been calculated by using of GP algorithm，which could explain the perform of felicity effect reasonably. Coulping properties of stress and AE show more obvious on fractal structure characteristics. The fractal dimension is relatively larger. The felicity effect is not obvious and the fatigue damage and structure defect degree is lower，which show the negative correlation.

Key words： rock mechanics multilevel dynamic loadings stress and AE strength deteriorating felicity effect correlation dimension.

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	Articles by authors
	SUN Huan1
	2
	LIU Xiaoli1
	CHEN Yulong1

Cite this article:

SUN Huan1,2,LIU Xiaoli1, et al. Experimental on coupling properties of stress and acoustic emission during coal and rock fracture under multilevel dynamic loadings[J]. , 2018, 37(S2): 4076-4085.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2018.0628 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/IS2/4076

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