Based on the Xiaohezui Coal Mine -12110 roadway, this study uses the FLAC3D ^{simulation software to} model excavation and support. It investigates the failure characteristics of semi-coal rock roadways and the support effect of installed anchor bolts and cables, validating the rationality of the support parameters. The results indicate: 1) The roof and sidewalls of the Xiahezi Coal Mine -12110 roadway experience significant damage. Due to the non-continuity of the semi-coal rock roadway, the rock layer undergoes greater plastic failure depth than the coal seam. Deformation decreases from the central rock layer towards the ends, showing less coal body advancement compared to the rock layer. Notable displacement occurs at the coal-rock interface. 2) With the designed anchor bolts and cables, the overall plastic zone of the roadway has been somewhat alleviated, though it did not alter the extent of stress concentration zones or the magnitude of stress peaks. Displacement in the sidewalls decreased by 15%, roof subsidence was suppressed by 10.5%, and floor heave reduced by only 3%. Overall, the support measures proved effective.