Abstract: To address the challenges of severe surrounding rock fragmentation and difficult support in roadways located in the transitional zone of varying coal thickness−from fully mechanized mining to fully mechanized top-coal caving−this study investigates the 824 working face of the Yuandian No. 1 Coal Mine. A mechanical model of the roof is developed to determine its response under single-factor conditions. Results indicate that as the mining thickness increases, the degree of roof pressure relief expands while roof subsidence decreases by 18.2%. Conversely, under mining-induced stress, the non-linear deformation of the roadway ribs increases by 55.6% with greater mining thickness. Furthermore, a numerical model is established, demonstrating that with increased mining thickness, the plastic zone develops most extensively in the roof, followed by the ribs, and least in the floor. Analysis of the dynamic stress evolution in the surrounding rock reveals that the stress concentration remains relatively stable on the solid coal side but gradually decreases on the goaf side. To control deformation, a combined support strategy is proposed: utilizing U-shaped steel arches for passive load-bearing and applying grouting reinforcement to modify the broken surrounding rock. Field measurements during the working face advancement confirm uniform stress on the rock bolts and stable rib deformation. This combined technology effectively controls surrounding rock deformation, satisfies operational requirements, and provides a valuable reference for roadway support under similar geological conditions.