When a mine 9306 transport roadway is dug through the F7 fault influence area,it faces the influence of roof plate crushing,tectonic stress development and other problems,and the original anchor cable support method is affected by the unstable anchor end,poor bearing capacity of the surrounding rock,and low support strength,which results in a poor effect of the surrounding rock control.Combined with the site conditions,it is proposed to control the deformation of the surrounding rock in the broken roof roadway by means of overrunning grouting,increasing the length of top anchor rods,and installing flexible trapezoidal beams on the top plate,etc.,and give the technical scheme of supporting the surrounding rock specifically.After the application on site,the peripheral rock of 9306 transport roadway over the broken roof plate always remains stable during the period,and the deformation of the top and bottom plates and the roadway gangs are small,and the peripheral rock support technology programme used on site has achieved better peripheral rock control effect.
broken roof,perimeter rock supporttectonic stressflexible trapezoidal beamoverrun grouting
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维普
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