For addressing the intense strata pressure induced by thick-hard roof in the haulage gateway of No.11618 transport roadway at Xieqiao Mine in Huainan, a combined methodology of numerical simulation and field monitoring was employed to systematically analyze the regulatory mechanism of presplitting blasting roof-cutting and pressure relief technology on the stress field of surrounding rock. A FLAC3D model, founded on the Mohr-Coulomb criterion, was developed to elucidate the dynamic evolution characteristics of stress fields before and after roof-cutting. The results demonstrated that the roof-cutting and pressure relief technology significantly optimized the roof stress distribution: the vertical stress peak decreased by 17.8%, and the stress concentration zone shifted 3.4 m deeper into the coal mass. Concurrently, the peak of advanced abutment pressure reduced from 63 MPa (without roof-cutting) to 56 MPa, while the vertical stress peak in the coal rib increased by 21% due to stress redistribution. Field monitoring data revealed that the maximum roof-floor convergence remained below the 300 mm warning threshold, and the bearing capacity of bolt-cable support systems remained stable, confirming the effectiveness of this technology in controlling surrounding rock deformation.