Abstract: With the depletion of shallow coal resources, mining operations are progressively shifting to deeper levels.To address the challenge of controlling floor heave in mining roadways under deep mining conditions, this study focuses on the 153241 mining roadway in the No.2 Mine of Sihe Mine with Jinneng Holding Group.By integrating theoretical analysis, numerical simulation, and field experiments, the mechanism of floor heave in aluminum mudstone was uncovered, and effective control measures were proposed.Analysis based on the mechanical model of roadway floor failure revealed that the floor strata lose stability due to insufficient compressive strength under horizontal stress, with a critical stress of 4 MPa leading to a maximum heave of 0.63 m.Comparative analysis using FLAC^3D numerical simulation demonstrated that cable reinforcement support significantly improves the stress distribution of surrounding rock, reducing the heave from 0.64 m under original support conditions to 0.325 m（50.7% reduction）.After implementing the combined support technology of floor-angle anchor-cables, the average floor heave of the roadway decreased from 507 mm to 298 mm（58% reduction）,and the convergence of the two sides stabilized within 207 mm.The research shows that the full-section support strategy of “strengthening the sides and roof while reinforcing the floor angles” can effectively mitigate shear flow deformation of soft rock floors under high-stress environments, providing theoretical and practical references for stability control in deep roadways.