To address the prominent problems of large gas emissions from adjacent coal seams and poor gas drainage per-formance of the high-level drainage roadway in Yangquan No. 5 Coal Mine, the 8716 working face was taken as the engineering background. A mining-induced overburden damage evolution model was established using parti-cle flow numerical simulation software. The evolution characteristics of overburden damage, including fracture development, microseismic response, and porosity variation, were systematically analyzed, and a multi-field fu-sion method integrating the fracture field, microseismic field, and porosity field was proposed to identify the gas-conducting fracture zone. The results show that the three fields exhibit significant coordinated evolution characteristics. When the key strata break, fractures propagate upward in a stepwise manner, microseismic events become intensively activated, and the high-porosity zones migrate upward synchronously. According to the com-bined criterion of total fracture density, vertical fracture density, the proportion of high-energy microseismic events, and the proportion of high-porosity zones, fractures are densely developed and microseismic activity is intense in the region from the coal-seam roof to the floor of Sub-key Stratum 4. However, the connectivity of overburden fractures above Sub-key Stratum 4 is insufficient. Therefore, the upper boundary of the gas-conducting fracture zone is determined to reach the floor of Sub-key Stratum 4, at a height of 70.6 m above the coal-seam roof. Meanwhile, high-porosity zones are concentrated in the region between Sub-key Stratum 2 and the floor of Sub-key Stratum 4 and are located above the voussoir-beam structure. This region is therefore identified as the middle and upper parts of the gas-conducting fracture zone. Along the strike direction, although numerous mining-induced fractures develop in the central part of the goaf, most of them are closed under com-paction. By contrast, within the zones extending 60 m inward from both sides of the working face in the upper part of the gas-conducting fracture zone, the fractures remain open and the porosity is highly developed, forming effective gas-conducting pathways. These zones can be further identified as the “O”-ring fracture zone. Based on the above development characteristics of the gas-conducting fractures, the layout of the high-level drainage roadway at the 8716 working face was optimized. As a result, the drainage rate of pressure-relief gas from adja-cent coal seams remained stable at 85%, significantly improving the gas control performance.