Abstract: Under the influence of fire areas, close-distance coal seams are prone to triggering hazardous gas intrusion hazards during mining operations, which severely restricts safe production in mines.Taking the fire zones of Wuhushan Coal Mine and Gongwusu Coal Mine in the Wuhai mining area as examples, we identified indicators of hazardous gas intrusion and used the ANSYS Fluent software to reverse-engineer the movement patterns of hazardous gases in fire-affected areas during working face operations.By analyzing the influential factors of overlying fore zones on the working surface, we summarized the criteria for determining the impact of fire zones and applied them to actual field engineering scenarios.The results show that when gas from the fire zone infiltrates, CO₂ gas is more easily detectable than CO gas.CO₂ gas should be used as an indicator of gas intrusion in the working face.Based on simulation results and gas intrusion examples, when the CO₂ concentration on the working surface suddenly increases to more than five times the normal level in the corner or in the goaf, it can be considered that hazardous gases have begun to intrude the working face.According to the theory of mine ventilation, when the goaf, fire zones, and the surface are interconnected, the criteria for determining the threat to the working face from overlying fire zones are.This standard has been successfully validated at the 011203 working face of the Wuhushan Coal Mine.