不同含水率及黏土含量下松软煤体力学特征试验研究

doi:10.13722/j.cnki.jrme.2016.1122

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Abstract

Using the coal preparation equipment developed by ourselves，experiments on mechanical characteristics of soft coal were studied under different moisture content and clay content with the help of RMT–150B rock mechanics test system. The results showed that：(1) when the moisture content range from 1.59% to 6.50% in the test，critical moisture content is existed under the same clay content of the soft coal，the compressive strength of coal is the highest and the modulus of elasticity is the maximum at the level of the critical moisture. (2) The compressive strength and elastic modulus of the soft coal content were firstly increased and then decreased and the highest clay content are all about 11.68% under different moisture content when clay content increased from 4.00% to 19.36%. (3) In the same conditions，with the increase of water content and clay content，the brittleness of soft coal decreases while the ductility increases，the poisson ratio also increases. (4) The liquid bridge force of soft coal inter particles with the change of moisture content is the main reason for the evolution of the concept of mechanical behavior，the appropriate amount of clay particles can be used as cement to further strengthen the coal. The research results have important theoretical significance and engineering application value for the safe and efficient mining of soft coal seam.

Key words： mining engineering soft coal moisture content clay content mechanics characteristics liquid bridge force

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	Articles by authors
	ZHU Chuanqi1
	2
	LI Chuanming1
	2
	YIN Zhiqiang1
	2
	HOU Junling3

Cite this article:

ZHU Chuanqi1,2,LI Chuanming1, et al. Experimental study of soft coal mechanics characteristics with different moistures and clay contents[J]. , 2017, 36(S1): 3258-3265.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2016.1122 OR https://rockmech.whrsm.ac.cn/EN/Y2017/V36/IS1/3258

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