煤与瓦斯突出过程的细观机制研究

doi:10.13722/j.cnki.jrme.2016.0637

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Abstract Coal and gas outburst is a very complex dynamic disaster in underground coal mining process. In this paper，a numerical model was established based on the theory of particle flow to simulate the development of micro-cracks，displacement，force and velocity fields，and to investigate the microscopic mechanism of gas pressure and layer-stiffness ratio. The simulation results show that the coal and gas outburst is a relatively quick process. The shear cracks were mainly concentrated in the front tip of outburst，the tensile cracks occurred deep inside the coal. The gas outburst has great influence on the coal and rock damage. When the gas pressure is relatively small，the shear cracks occur at the front and the tensile crack reached deeper. When the gas pressure is relatively large，the shear cracks and tensile cracks penetrate into the same depth. The damage of coal and rock and the shear crack ratio increases. When the layer-stiffness ratios is not the same，the speed and shape of crack propagation are not the same.

Key words： mining engineering coal and gas outburst particle simulation method coal-rock mass shear crack tensile crack layer-stiffness ratio

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	Articles by authors
	HUANG Weixin1
	LIU Dunwen1
	XIA Ming2
	3

Cite this article:

HUANG Weixin1,LIU Dunwen1,XIA Ming2, et al. Study of meso-mechanism of coal and gas outburst[J]. , 2017, 36(2): 429-436.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2016.0637 OR http://www.rockmech.org/EN/Y2017/V36/I2/429

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