高温矿井掘进工作面冰块降温数值模拟研究*

为确定冰块在矿井高温掘进工作面降温中的设计参数，以大红山铜矿西矿段高温掘进工作面为对象，开展通风降温和冰块降温下掘进工作面温度场变化的数值模拟，分析冰块量、摆放方式对掘进巷道工作面附近温度场的影响。结果表明:与只采用通风降温方案相比，增加冰块的降温方案降温效果明显；当冰块摆放方式相同时，冰块量越多，有效制冷时间越长，但增加到一定程度时有效制冷时间基本不变；冰块摆放方式对降温效果有显著影响，在相同的冰块量及同一水平摆放方式下，冰块摆放高度与风筒齐平时的降温效果最佳；当冰块量及垂直摆放方式相同时，距掘进工作面越远，掘进工作面附近温度场温度的分布越均匀，制冷空间越大。

Numerical simulation of ice cooling in heading face of high-temperature mine

In order to determine the design parameters of ice for the cooling of high-temperature heading faces in the mines,taking the high-temperature heading face in the west mining section of Dahongshan copper mine as the object,the numerical simulation of temperature field change in the heading face under the ventilation cooling and ice cooling was carried out,and the influence of ice amount and placement mode on the temperature field near the heading face was analyzed.The results showed that compared with the ventilation cooling scheme,the cooling effect of adding ice was obvious.When the placement mode of ice was the same,the more the ice amount,the longer the effective refrigeration time,but when the ice amount was increased to a certain extent,the effective refrigeration time was basically unchanged.The placement mode of ice had significant influence on the cooling effect,and under the same ice amount and the same horizontal placement mode,the cooling effect was the best when the ice was placed at the same height as the air duct.When the ice amount and the vertical placement mode were the same,the farther away from the heading face,the more uniform the distribution of temperature field near the heading face,and the larger the refrigeration space.