Surrounding rock control technology of crossing abandoned roadway intersection of compound mining area

Taking the surrounding rock control of the abandoned roadway under the geological conditions of the compound area of Yuchang Coal Mine as the engineering background, aiming at the problem of difficulty in breaking and supporting the surrounding rock in the area where the abandoned roadway intersects, the surrounding rock control technology scheme and parameters of the crushing section of the mining roadway were studied. The theoretical width of the coal pillar stability of the mining roadway is obtained by theoretical calculation, it is necessary to use the support method of shed to maintain the roadway stability when the width of the elastic core area of the coal pillar in the triangular area of the cross roadway is less than 2 m by numerical calculation. Through the theoretical calculation and numerical simulation analysis of the stress and deformation of the surrounding rock of the roadway during excavation and mining, a reasonable scaffolding support area and support scheme were determined. Field measurement shows that the joint support method of anchor mesh cable and I-beam shed can effectively control the deformation of the roadway.