Abstract
In order to address the issue of high temperatures and thermal damages in deep mines, the factors causing downhole heat damage at high temperatures were analyzed, the mine ventilation system was optimized and rebuilt, and a cooling system was established. The proposed cooling system uses mine water as the cooling source, and its features are based on the analysis of traditional cooling systems. The current ventilation system in the 1118 m deep pit of the Jinqu Gold Mine was evaluated, and the ventilation network, ventilation equipment, and ventilation structures near the underground working face were optimized. The low-temperature mine water stored in the middle section of the mine at 640 m depth was used as the cooling source, and a cooling system was established near the 440 m deep middle return well to alleviate the high-temperature and high-humidity conditions of the 280 m deep middle-western area. The results show that the effective air volume in the west wing at 280 m was 3.0 m3/s, the operating ambient temperature was 27.6°C, the relative humidity was reduced to 76%, and the temperature was reduced by 5-6°C after the optimization of the system.
Highlights
In an era of rapid development of the global economy, the energy dependence is increasing rapidly [1,2,3,4]
As the mining depth increases, the temperature of the rock increases, and the heat damage caused by the ground temperatures and other factors is amplified [6,7,8,9,10,11]
In gold mines in India, at a depth of 3000 m, the geothermal temperature is more than 60°C. e world’s deepest underground mine is South Africa’s Carletonville gold deposit: the mining depth is 4000 m and the ground temperatures is 70°C
Summary
In an era of rapid development of the global economy, the energy dependence is increasing rapidly [1,2,3,4]. E high-temperature, high-humidity, and lowvelocity work environment on the working surface in deep mines will cause the central nervous system to be inhibited by workers working underground for a long period of time. Solving the problem of ventilation difficulties and high-temperature heat damage in deep mines can protect the physical and mental health of underground miners, and help improve the Advances in Civil Engineering. High-temperature thermal damage in underground mines can be minimized by nonarti cial refrigeration cooling and arti cial refrigeration cooling. Nonarti cial refrigeration cooling methods cannot be applied in deep mines to minimize high temperatures due to the limitations in the cooling capacity. E method is based on the principle of heat exchange between the cold mine water and the high air temperatures of the working area and minimizes the heat damage in the working area. The condensing heat discharged by the cooling and cooling system can be absorbed by the cold energy contained in the mine water source itself, reducing the emission of condensation heat and reducing the secondary thermal hazards generated underground
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
