金属矿山独头掘进巷道降温试验

金属矿山独头掘进巷道制冷系数是计算独头掘进巷道降温需冷量非常重要的参数之一，关系到能否达到预期降温效果及影响着降温工程的的经济投入。利用“金属矿山深部开采降温试验系统”分别模拟通风降温、加大风量降温、制冷降温、加大制冷降温4种条件下独头掘进巷道的降温过程，并分析独头掘进巷道降温效果，在通风及加大风量降温后，独头掘进巷道内温度先下降然后趋于稳定，再也无法下降，只有通过制冷措施，对独头掘进工作面进行降温。通过监测数据的焓差值计算出降温制冷系数，同时利用多次试验得出制冷系数范围在1.38~1.68，进而为独头掘进巷道降温设计提供设计依据。

Cooling Experiment on Blind Heading Face of Metal Mine

The cooling coefficient in heading face of metal mine is one of the important parameters for calculating the required amount of cooling for tunneling and related to whether to achieve the desired cooling effect and economic investment influencing the cooling engineering.With the aid of the mine deep mining cooling test system，the cooling process in heading face under four conditions of ventilation cooling，cooling by increasing air flow，refrigeration cooling and cooling by increasing refrigeration are simulated，and the cooling effect in heading face is analyzed.After ventilation and cooling by increasing ventilation，the temperature in heading face was dropped first，stabilized，and then kept still.Only the refrigeration measures can lower the temperature in heading face.With the monitoring data，the refrigeration coefficient is calculated out by using the enthalpy difference.At the same time，it is obtained that the refrigeration coefficient ranges at 1.38~1.68 from many experiments.This research provides the design basis for design of cooling in heading face.