Abstract: With the deepening of metal mining and the improvement of mechanization，the problem of deep heat damage is becoming increasingly prominent. Traditional ventilationmethods are unable to meet the cooling needs of deep mining sites. Therefore，local cooling technology is needed to improve the ther⁃ mal environment of mining sites. Taking the Song Country Shanjin Mining area as the engineering back⁃ ground，a local cooling system was constructed for the high temperature environment of up to 38 ℃ in the deep working face，combined with factors such as cooling loading method and cooling transportation meth⁃ od. The key parameters of the cooling system were optimized by using MATLAB genetic algorithm，and the optimal cooling capacity of the system was determined to be 1 262.55 kW，with a drying ball temperature of 25 ℃ and an air flow rate of 8.5 m³/s. A thermodynamic model was established by using Fluent numeri⁃ cal simulation technology，and the evolution law of temperature and humidity field under the coupling ef⁃ fect of multiple heat sources of personnel，rock drilling rig，and loader was systematically analyzed，verify⁃ ing the reliability of the cooling system. The results show that the centralized air supply and cooling scheme can effectively control the wet bulb temperature of the working face below 27 ℃，which has a simple system structure，low investment and operating costs，and good economy and applicability，provides a thermal hazard control solution for safe and efficient mining in deep metal mines，and has significant engineering application value.

Key words: deep well, heat damage, local cooling, numerical simulation