Abstract: Considering that the stress concentration area caused by the uneven distribution of mining stress in the surrounding rock when the isolated island working face is too large with syncline structure, the behavior law and distribution characteristics of the mine pressure are studied based on numerical simulation and field monitoring and taking the 418 working face of Chenjiashan Coal Mine as background.The results show that under the influence of the syncline structural area, the abutment pressure in the middle of the working face from the shaft to the wing increases by 24.7%,24.3%,20.6% and 20%,respectively, and the pressure concentration of the coal seam floor of the working face on the syncline axis is obvious.Aiming at the high stress concentration area of the surrounding rock in the folded structural area of the 418 working face, the pressure relief technology of large-diameter borehole and roof pre-fracturing blasting was proposed, and the pressure relief effect was evaluated.The field results show that the method has a significant effect on the prevention and control of rock burst.The risk of strong mine pressure disaster in the area is reduced, thus ensuring the working face's safe mining.