岩浆岩侵入区巨厚煤层掘进巷道冲击地压机制研究

doi:10.13722/j.cnki.jrme.2017.0357

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Abstract Rockbursts frequently occur during mining in magmatic intrusion areas. The mechanism of rock burst at heading roadway in thick coal seam in magmatic intrusion areas is thus studied theoretically and numerically. A formula for calculating the stress distribution in surrounding rock of the roadway was deduced based on the elastoplastic theory. The contours of stress distribution shows that the direction of maximum principal stress and the concentration area position of maximum shear stress were perpendicular to the inclination angle of coal seam. The dip angle of coal seam does not change the concentration degree of maximum principal stress and shear stress. The lateral pressure coefficient had a greater influence on the concentration of the maximum principal stress. The large hard magmatic rock roof suspending in the goaf leads to the overall increase of the stress in the large area of coal nearby，which provides the static loading for rockburst. Tunneling induces the instantaneous release of energy from the local magmatic rock，which provides the dynamic loading for rock burst. Based on the above analysis，the mechanical model of rock burst in roadway in thick coal seam in magmatic rock intrusion zone was established，the criterion of rockburst occurrence was obtained and then the mechanism of rockburst was obtained. The application of the research results guided the prevention of rock burst in practice.

Key words： mining engineering rockburst magmatic intrusion area heading roadway rock burst mechanism static and dynamic loading

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	Articles by authors
	LIU Shaohong1
	2
	PAN Junfeng1
	2
	WANG Shuwen1
	2
	FENG Meihua1
	2

Cite this article:

LIU Shaohong1,2,PAN Junfeng1, et al. Rock burst mechanism of heading roadway in thick coal seam in magmatic intrusion areas[J]. , 2017, 36(11): 2699-2711.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.0357 OR https://rockmech.whrsm.ac.cn/EN/Y2017/V36/I11/2699

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