有效应力对石门揭煤突出影响分析和试验研究

doi:10.13722/j.cnki.jrme.2017.0280

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Abstract The coal and gas outburst in crosscutting is the most serious dynamic disaster in coal mine in China. The relationship between the critical effective stress and the exposed area was deduced according to the fold catastrophe model. The maximum exposed areas of Fuxin Sunjiawan coal mine were presented under the different mining depth. The relationship between the exposed area and the critical effective stress was analyzed. The outburst coal seam at －1 100 m in Sunjiawan mine of Fuxin was studied. The experiment of the exposed area influencing the coal and gas outburst was performed using the triaxial outburst instrument designed and developed in-house and the coal briquette was put in the outburst instrument. The triaxial pressures were applied to the coal samples to simulate the stress environment of coal seam. The different exposed areas were simulated by changing the area of weak surface(30.19，34.21 and 38.48 cm2). The results show that the critical effective stress increases with the increasing of the exposed area. The calculated results agree with the experimental data，which verified the formula of the critical effective stress. The critical effective stress and exposed area are main factors of the intensity of coal and gas outburst in crosscutting. The distribution of coal powder after outburst has the characteristics of fluctuation. The outburst energy and intensity near the exposed face both increase with the increasing of exposed area and critical effective stress.

Key words： mining engineering exposed area coal and gas outburst critical effective stress intensity of outburst

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	TANG Jupeng
	DING Jiahui
	YU Ning
	LU Jiangwei

Cite this article:

TANG Jupeng,DING Jiahui,YU Ning, et al. Analysis and experimental study on the effect of effective stress on coal and gas outburst in crosscutting#br#[J]. , 2018, 37(2): 282-290.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.0280 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/I2/282

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