<p>The floor heave in mining roadways is a significant issue in coal mine safety operations. To safeguard the roadway from deterioration in a mine in Shanxi, utilizing the 4303 working face as the engineering context, a mechanical model was developed, elucidating the process of roadway floor heave, and a new method for mitigating roadway floor heave was introduced. The efficacy of the new method was validated by numerical simulation and field testing. Initially, a mechanical model of floor heave is constructed based on the Rankine earth pressure theory, taking into account the surrounding rock structure and the stress of the roadway. The maximum failure depth of the floor is computed, and the formula for calculating the effective thrust of the plastic slide on the roadway floor is established. The findings indicate that the abutment pressure on both sides is the primary factor contributing to floor heave. Increased stress on both sides of the roadway facilitates deformation and failure of the roadway surface, resulting in greater depth and extent of the deformation. A novel method for regulating roadway floor heave is offered. The FLAC^3D numerical calculation model demonstrates that the novel method may successfully diminish the peak abutment pressure of the solid coal side behind the working face by approximately 35%, thus greatly alleviating the pressure source responsible for the floor heave of the roadway. The field test, conducted in conjunction with the 4303 working face, validated the feasibility and efficacy of the new roadway floor heave control method. The research findings may offer novel insights for managing roadway floor heave in later mining faces and analogous circumstances.</p>