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七一一矿因受地下热水影响,使井下掘进工作面空气温度一般都在35℃以上。为了改善井下气候条件,采取了集中制冷、分散降温的空调方案。地面冷冻站(正常运行时的设计总制冷能力为100万大卡/小时),将循环水的温度降至5～10℃,而后送往井下各处的空气冷却器,被冷却的空气通过局扇和隔热风筒送往工作面。冷水与空气进行热交换后,温度升高,泵回冷冻站,再降温,循环往复使用(图1)。该矿区地处湖南南部,
Seventy-one mine due to the impact of underground hot water, underground borehole heading air temperature are generally above 35 ℃. In order to improve the underground climate conditions, has taken a centralized cooling, decentralized cooling air-conditioning program. Ground freezing station (normal design of the total cooling capacity of 1 million kcal / hour), the circulating water temperature dropped to 5 ~ 10 ℃, and then sent to the underground air cooler, cooled air through the Board Fans and insulated hair dryer sent to the work surface. Cold water and air heat exchange, the temperature rises, pumping back to the freezing station, and then cooling, cycling back and forth (Figure 1). The mining area is located in southern Hunan,