深井交岔点围岩流变扰动效应及钢管混凝土组合支架支护技术研究

doi:10.13722/j.cnki.jrme.2017.1197

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Abstract The roadway intersection linking 1100 central pump station and water tank of Huafeng coal mine was investigated in order to solve the supporting problem of roadway intersection at the depth of 1 000 m. The key factor affecting the deformation and failure of intersection was revealed to be the rheological perturbation effect of rock based on the results of field investigation，experimental tests，rheological experiment on rock and theoretical analysis. The supporting technology of concrete filled steel tube was put forward，and the repairing scheme of the intersection support based on the composite support with concrete filled steel tubes was designed. The results of the finite element analysis，the theoretical calculation and the second rheological perturbation experiment，indicate that the bearing capacity of the composite support meets the stability requirements of the surrounding rock under the action of dynamic pressures. The composite support scheme employing the concrete filled steel tubes has been stable for 5 years. Overall，the intersection is stable and the support deforms slowly. The research indicates that the deformation mechanism of the intersection at 1 000 m deep is complex and the support structures are easy to damage due to the rheological disturbance.

Key words： mining engineering roadway at 1 000 m deep roadway intersection concrete-filled steel tube combined support rheological perturbation effect of rock

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	Articles by authors
	WAN Jun1
	HUANG Wanpeng2
	ZUO Jianping3
	TIAN Tian4

Cite this article:

WAN Jun1,HUANG Wanpeng2,ZUO Jianping3, et al. Rheological perturbation effect of rock and combined support of concrete filled steel tubes in deep coal mine roadway[J]. , 2018, 37(2): 461-472.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2017.1197 OR http://www.rockmech.org/EN/Y2018/V37/I2/461

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