Mine Cooling System Design and Engineering Application in Kilometers Depth of Yangcheng Coal Mine

In order to effectively solve the problem of high temperature and heat damage occurred in 1 000 m depth working face of Yangcheng Coal Mine, construct an economical and efficient underground central cooling system, combined with the cooling water system of self-owned power plant and surplus plumbing pipeline system of the draft, a central cooling system was designed, the cooling load of the working face and the hydraulic calculation method of pipeline system were summarized. Simplified the cooling water technology and complicated calculation process.The engineering application results showed that the single cooling capacity of the designed mine refrigeration unit can reach 3 600 kW, which can satisfy the cooling requirement of one mining face and three tunneling faces.Through the observation of air parameters before and after the cooling of working face, it was known that after cooling, both temperature and humidity indexes are superior to the predetermined index, the working environment has been significantly improved.