Study on deformation of roof of ore rock contact zone roadway

doi:10.16265/j.cnki.issn1003-3033.2018.07.020

Abstract

Abstract: In order to analyze the influence of roadway roof deformation on the stability of contact roadway,taking the contact roadway in Daye iron mine as the research object,a mechanical model of the roof of contact roadway was established based on mechanical analysis,and the expression of the disturbance of rock beam of the roof of contact roadway was deduced.By using FLAC^3D software,the stress distribution and settlement amount of the roof of the contact zone roadway were analyzed,based on the field monitoring test,the accumulative settlement and settlement rate of the roof on both sides of the roadway in the contact zone were further analyzed.Research shows that the two groups of stress in the ore rock contact zone are concentrated locally,the roof and floor have the phenomenon of unloading,and the roof stress jumps fluctuatly in the contact zone.The roof subsidence of roadway is obvious,but the change of displacement nephogram is stable,and the range of displacement influence area is about 5.00 m around the contact band.The cumulative settlement and settlement rate of the side roof of the contact roadway iron ore are all smaller than those of the marble side.The settlement rate of the side roof of marble increases first and then decreases,and the deposition rate of the side roof of iron mine first increases,then decreases,then increases and then decreases.

Key words: contact zone, roof of roadway, deformation law, numerical simulation, deformation monitoring

CLC Number:

X936

LIU Xiaoyun, YE Yicheng, LI Yufei, LUO Binyu, LIU Yang, WANG Qihu. Study on deformation of roof of ore rock contact zone roadway[J]. China Safety Science Journal, 2018, 28(7): 122-128.

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