Research on orthogonal experimental design technology based on anchor mesh cable coupling support

Abstract

In view of the difficulty in supporting the return air gateway under the goaf of the close coal seam in Xihe Coal Mine, in order to improve the stability of the roadway of the close coal seam group and the supporting effect of the roadway, the orthogonal test method is adopted. Based on seven main influencing factors, such as the length of the anchor bolt, three common variables are set for each factor, and the FLAC3D numerical simulation software is used to simulate and analyze 18 groups of orthogonal tests to obtain the best optimization scheme. Then, the deformation of surrounding rock and the range of shaping zone are compared before and after optimization. Compared with the original support scheme, the optimized support scheme reduces the roadway displacement, reduces the stress release area, improves the bearing capacity of surrounding rock, effectively solves the serious problem of surrounding rock deformation in Xihe Coal Mine, and provides theoretical and technical support for roadway deformation control.