Abstract: In response to the technical challenge of damage to the integrity of overlying coal seams caused by the movement of overlying rocks during upward coal mining, this paper takes the disturbance effect of the underlying No.9 coal seam mining on the overlying No.5 coal seam in the Pulongwan mine as the research background. Combining theoretical analysis, numerical simulation, and physical similarity simulation techniques, the rock fracture law and stress field evolution characteristics under close range coal seam group mining conditions are revealed. Research has shown that based on the "three zones" theory of mining overburden, the average height of the collapse zone formed by the mining of coal seam No.9 is 9 m, and the extension height of the water conducting fracture zone reaches 36m. The rock influence coefficient K calculated by the ratio analysis method is 19.99, which exceeds the critical value of 7.5 for medium hard rock layers, indicating that the roof rock layer exhibits non coordinated deformation characteristics; Using the rock mass balance method, the minimum interlayer spacing for safe mining of coal No.5 is 45 m, while the actual interlayer spacing of 60 m meets the protection requirements. Numerical simulation shows that after the mining of the No.9 coal face, the overlying No.5 coal seam is within the influence range of the mining plastic zone, and there is no stress concentration phenomenon in the protected coal pillar area. Similar simulation experiments have shown that the maximum subsidence of the overlying coal seam caused by the mining of the underlying coal seam is 10mm, and the height of the model collapse zone remains stable at 15 cm, which conforms to the law of rock movement. Verified the technical feasibility of implementing the overlying 5 coal seam mining after the completion of the underground No.9 coal mining in the mine.