Abstract
High rock temperature in deep coal mine is a problem, which restraints the exploration of coal resources, we must reduce the temperature humidity at working face. The HEMS (High temperature heat Exchange Machinery System) were developed by using coal mine water as cold source. The system is applied in Jiahe colliery with moderate cold source in phase I, for phase II, we proposed water circulation at different elevations as cold source and the cooling system run effective. Operational principle for HEMS-I was presented and gave the theoretical basis for optimization design. After cooling, air temperature at C point on working face is from 28∼29 °C, it is less than 30°C and conform to coal mine safety regulation.
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