Study on surrounding rock support technology of roadway in jump mining face

Taking the transportation roadway of 2301 jump mining face of Heilong Coal Industry as the engineering background, the roadway support parameters are determined and verified by means of theoretical calculation, numerical simulation and on-site deformation monitoring. the supporting parameters such as bolt (cable) diameter, length, pretightening force, Anchoring force, Anchorage length and row distance are determined theoretically, and the orthogonal test scheme is designed for numerical simulation to determine the overall support scheme of the roadway. Through the on-site surrounding rock deformation monitoring, it is determined that under the designed support scheme, the maximum deformation of roadway roof and floor is 178 mm, and the deformation of two sides is 152 mm, which can meet the requirements of mine support.