Creep Surrounding Rock Control Technology of Rise Group Roadway in Abnormal Ground Stress Zone

In order to solve the support difficult problem of the rise group roadway in abnormal ground stress zone, according to ground stress features of Changcu n Mine, the stress distribution law of the surrounding rock in different directional maxium horizontal main stress roadway was simulated and analyzed.An analysis was C onducted on the coal pillar width between the rise group and roadway heading sequence affected to the support mode and a full length pre-stressed power bolt and anc hor combined support system was applied to the rise group roadway.The trial results showed that when the width of the coal pillars between the rise group in the abnor mal ground stress zone was over 30 m, the roadway heading sequence would not affect to the roadway support.When the full length pre-stressed power bolt and ancho r combined support system was applied, the two sidewall convergence value of the mine roadway would be 87 mm in maxium, the maxium subsidence of the roof would be 18 mm, the maxium stress of the bolt would be 183 kN and the maxium stress of the anchor would be 250 kN.The roadway deformation value and the stress of the b olt and anchor were stable and the deformation of the surrounding rock was effectively controlled.