Design of support parameters of broken and soft rock roadway in deep mine

Through FLAC^3D numerical software to analyze support parameters of soft rock roadway-the north 2 roadway in Jiulong mine,the paper optimized the support parameters of anchor and shotcrete layer,put forward optimized roadway support method,and analyzed roadway surrounding rock stability of original and optimized roadway support method under the conditions of driving and dynamic mining pressure for the decrease of roadway surrounding rock deformation. The results show that the optimized roadway support method that the length of roof, side and bottom angle equal strength dextral thread steel anchors is 2000mm,2200mm,2400mm,the thickness of shotcrete layer is 180mm,the row and line space of the anchors which the length is 7000mm is 2000 × 2000mm could effectively ensure the roadway surrounding rock stability and meet the need of roadway safety and normal production.