Abstract: With the increasing demand for mineral resources，deep mining has become an inevitable trend in the development of the mining industry.However，the problem of mine heat hazard seriously threatens the safety of underground operations and production efficiency.Taking the Xindongzhuang mining area as the research object，this study systematically analyzed the causes and heat source characteristics of deep mine heat hazard，combined with on-site investigation and numerical simulation methods，and devel⁃ oped a new type of mobile cooling equipment for underground use.Based on on-site measurements of wind temperature，humidity and rock ground temperature，the study obtained the linear growth law of wind tem ⁃ perature with depth and the temperature gradient，and clarified the thermal environment characteristics of the deep part of the mining area.The heat source analysis showed that the heat dissipation of the surround ⁃ ing rock accounted for the highest proportion，followed by mechanical and electrical equipment and air self-compression.In response to the limitations of existing ventilation and cooling technologies，a mobile cooling device with an ice-water mixed cold source was proposed，which uses finned tube heat exchangers to enhance heat exchange efficiency.Through COMSOL Multiphysics numerical simulation，the perfor⁃ mance of the equipment was verified.This equipment，while having high flexibility，efficiency and energy saving，provides cooling for specific areas in the deep mine on demand，achieving a balance between ther⁃mal environment control and energy consumption optimization.This research provides theoretical reference and technical guidance for the study of heat hazard control in deep mines.

Key words: deep mine, thermal hazard control, mobile cooling equipment, finned tube heat exchang? er, numerical simulation