Analysis on Grouting Role to First Support in Mine Roadway Repair

According to the some mine roadways been used for a long period in the present production mines, due to the initial support strength, irational support mode or mining operation influences, serious deformation ailures occurred on the mine roadways, the surrounding rocks with shallow mining depth were completed fail ure, the cracks in the surrounding rocks were expanded forward to the deep section the conventional support means would have no support base. The numerical simulat ion software UDEC was applied to simulate and analyze the grouting affected to the previous anchor support of the deformed and failed mine roadway and to the role to improve the broken surrounding rock status.The grouting application could improve the previous bolt (anchor) support function, improve the surrounding rock status and provide the reliable basis to the gateway expansion and reinforcement.Based on the circumstance, after the grouting operation conducted to the failed gateway, the anc hor reinforcement alternative was provided to solve the repair and reinforcement of No.76 overhead manriding gateway in Wuyang Mine.After the repair of the gateway, the convergence deformation rate of the surrounding rock would be less than 5%.