卸荷条件下含瓦斯煤力学特性试验研究

doi:10.13722/j.cnki.jrme.2014.s2.011

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Abstract Based on the triaxial stress thermal-hydro-mechanical coal containing gas system，unloading confining pressure experiments under different gas pressures and confining pressuresand speeds of unloading confining pressures，are carried out to study the influences of gas pressure，stress，speed of unloading confining pressure and their coupling conditions on the mechanical properties and the laws of roadway surrounding rock deformation and failure. The results show that：(1) The gas pressure has an obvious infulence on the coal elasticity modulus. The elasticity modulus decreases with the increase of gas pressure. (2) The confining pressure has an obvious infulence on the coal elasticity modulus. The elasticity modulus increases with the increase of confining pressure. (3) The speed of unloading confining pressure has an obvious infulence on the coal elasticity modulus. The elasticity modulus decreases with the increase of the speed of unloading confining pressure. (4) The time before deformation and failure increases with increase of confining pressure，decrease of gas pressure and the increase of speed of unloading confining pressure.

Key words： mining engineering containing gas coal unloading confining mechanical properties experimental research

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	Articles by authors
	XU Youlin1
	2
	KANG Hongpu1
	2
	ZHANG Hui1
	2
	WANG Weizhong3

Cite this article:

XU Youlin1,2,KANG Hongpu1, et al. EXPERIMENTAL STUDY OF MECHANICAL PROPERTIES OF COAL CONTAINING GAS UNDER UNLOADING CONDITIONS[J]. , 2014, 33(S2): 3476-3488.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.s2.011 OR https://rockmech.whrsm.ac.cn/EN/Y2014/V33/IS2/3476

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