Sectional support technology of weathered bedrock in inclined shaft of Piliqing Mine

in order to sove the large convergence of the two sidewals roo fallng,high support cost and other problems occurred in the sectional support section ofthe weathered bedrock in the inclined shaft of ilicing Mine.based on the division ofthe bedrock section and thesite anchoring forcetest.the optimized plan of the sectonal support was conducted on the weathered bedrock wth the H type support and the bot !/ mesh l anchor cable i shotcreting support methods An analysis with the FlAC-D sinmulaton and the sie industrial trial were conducted.The resuts showed that the bot /steel mesh / anchor / shotcreting support at the weak weathered bedrocksection could meet the anchoring forcedesign requirements of 98 k N and 196 k N.the control effctof the surounding ock was beter than thef type steel support and the plasicity zone with and deformation value of the surounding rock was reduced by 25% and 40% individually.Therefore the sectional suppor conducted at the weathered bedrock section could reach a better support effect.