Abstract: Aiming at the problem of gas well instability caused by the moving deformation of overburden caused by high-intensity mining of coal seams in the coal-gas co-mining, based on the geological and mining technological conditions of Xiaobaodang No.2 Coal Mine and the on-site measured data, the shear force and horizontal deformation characteristics of the casing-cement ring combination of gas wells under the conditions of high-intensity mining of ultra-long and ultra-wide working face were investigated by numerical simulation.The influence of the easily deformed locations along the axial direction of the casing and the rock formation's distribution characteristics on the gas well's stability were analyzed and obtained.The results show that tensile deformation dominates the overburden above the key stratum to the surface, while shear deformation dominates the key stratum and the underlying adjacent rock layers.The maximum shear stress of gas well casing under the influence of multiple extractions in 132204-132206 working faces on the tendency is 208.5 MPa, which is 81.76% of the permissible shear strength of 255 MPa, and the maximum horizontal displacement is 87.3 mm.Along the 132205 working face, 180 m wide gas well was left to protect the coal pillar.After advancing 250 m from the second setup entry, the casing reached the maximum shear stress of 169.5 MPa, which was 66.5% of the permissible shear strength, and the maximum horizontal displacement was 83.1 mm, so the gas well with 180 m of coal pillar protection was able to maintain a good integrity.The results of the study are of great value and significance for rationally determining the size of protective coal pillars of other gas wells in the Xiaobaodang No.2 Coal Mine field, preventing wellbore failure and realizing the synergistic development of coal-gas resources.