动静组合加载含水煤样能量耗散特征分析

doi:10.13722/j.cnki.jrme.2015.0546

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Abstract In order to study the feature of energy dissipation of unstable failure for static coal under dynamic disturbance，the coupled loads test of static and dynamic was proceed for different saturated state coal samples by the improved split Hopkinson pressure bar(SHPB) experimental system，the feature of energy dissipation of water-saturated coal samples was analyzed in the process of impact，and the relationship between fragmentation，fractal dimension and energy density of the coal samples were obtained. The results show that the positive correlation between incident energy and energy density of three kinds of saturated state coal sample were presented. With the increase of saturated time，dissipation rate and transmissivity are gradually reduced，the transmission rate are increasing. With the increase of saturated time，the energy density of the samples is gradually reduced，and the dynamic strength is reduced，the weakening effect was presented of saturated for the strength of coal samples. Under the condition of the same energy density，the average particle size of coal sample under the natural state is greater than the saturated 3，7 days，the negatively correlated between energy density and crushing granularity were presented，both have good linear relation. The fitting curve is obviously low of energy density and fragmentation of the saturated 3 and 7 days coal sample. The water has a significant effect on crushing particle size. The fractal dimension of the coal sample is 1.67–2.25，the average fractal dimension of coal sample under natural state is less than the saturated 3 and 7 days. With the increase of energy density，the fractal dimension of coal samples is increased. The positive correlated between energy density of sample and the amplification of fractal dimension was present，and both have good linear relation.

Key words： rock mechanics split Hopkinson pressure bar(SHPB) test static and dynamic loads energy dissipation fractal dimension

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	Articles by authors
	WANG Wen1
	2
	LI Huamin1
	2
	GU Helong1
	WANG Chen1

Cite this article:

WANG Wen1,2,LI Huamin1, et al. FEATURE ANALYSIS OF ENERGY DISSIPATION OF WATER-SATURATED COAL SAMPLES UNDER COUPLED STATIC-DYNAMIC LOADS[J]. , 2015, 34(S2): 3965-3971.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.0546 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/IS2/3965

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