Abstract: In thick coal seam mining with hard roof strata, the large extraction height and high roof strength easily lead to the formation of multi-level suspended structures in the overlying strata. This severely affecting the stability of the gob-side roadways, especially in adjacent working faces, often causing severe roadway deformation. Therefore, it's crucial to address the challenges in controlling the stability of surrounding rock in gob-side roadways under hard roof conditions. This paper studies the mechanism of stress control through deep-hole blasting in gob-side roadways under hard roof conditions along the roadway. Analyzing the failure-instability laws and structural evolution characteristics of the overlying strata. Obtaining the distribution laws of stress-field, displacement-field, and plastic-field zone in gob-side roadways and adjacent coal pillars on the blasting roof-cutting side, transition zone and non-roof-cutting side. The results show that under hard roof conditions, the average stress of gob-side coal pillars on the roof-cutting side is 8 MPa lower than that on the non-roof-cutting side, while the average roof subsidence of gob-side roadways on the roof-cutting side is reduced by 29.2 cm. These findings have been implemented at the 15108 and 15109 working faces of Jingfu Coal Mine, Huayang Group. A 200 m section of the return air roadway in 15108 working face (In the range of 640 m to 840 m from the open-off cut) was designated as the test zone foe blasting roof-cutting and stress relief, with a roof-cutting depth of 30 m and a borehole spacing of 1.0 m. The measurement results show that compared with the non-roof-cutting section, the roof deformation of gob-side roadways in the roof-cutting section decreased by more than 25%, the deformation of both sides of the roadway dropped by over more than 30%, and the surrounding rock deformation rate was reduced by more than 40%. The research results show that the deep-hole blasting roof-cutting for gob-side roadways effectively mitigates lateral suspended roof strata, modifies overburden structure, alleviates stress concentrations in surrounding rock, reduces roadway deformation, and achieves notable control effects.