Numerical simulation study on the influence of the ground stress field on the stability of roadways

We adopt the concept of generalized plane strain to model a roadway in a stress field. This can avoid limitations caused by simplifying the stress analysis as plane strain. FLAC3D was used to investigate the maximum tensile stress and displacement of a roadway in a known stress field for angles, between the roadway axial direction and the maximum principal stress of 0°, 30°, 45°, 60° and 90°. This theory was applied to the analysis of an engineering case. The results indicate that stress and displacement of the surrounding rock increase as the angle, increases. This provides some significant guidance for a reasonable layout of roadways in a known stress field.