Repair Supporting Technology for Broken Soft Rock Roadway in Guocun Mine

Combined with the characteristics of crushed surrounding rock and the deformation of roadway in 12061 low level suction roadway in Guocun Mine, the continuous deformation causes and mechanism of the repaired roadway were analyzed. The repaired supporting was proposed, which got rid of passive support method with U steel, to use the repair supporting technology of "the high strength cable anchor, working slope, strengthening grouting", the supporting parameters were optimized, which includes making use of the high strength protecting scale component (large tray, high strength steel ladder) and the base anchor cable, increasing the pre-tightening force of bolting and cable, optimizing the parameters and process of grouting and so on. The field experiments show that the roadway repair supporting technology is effective in controlling the deformation of 12061 crushing surrounding rock low level suction roadway.