首山一矿地面集中式降温技术与工程实践

首山一矿己组煤层属二级高温区，煤层埋藏深、工作面走向长、通风距离远，煤层底板以上地温梯度263～418℃/100m，平均地温梯度342℃/100m，大多数工作面温度均超过33℃、湿度达到96%，矿井热害问题严重。为保障职工的身心健康和矿井的生产安全，平宝公司采用集中式降温技术处理首山一矿己组煤层矿井热害问题。文章通过对己组煤层各工作面降温效果进行分析，评价了地面集中式降温系统的降温效果。结果表明，装备空冷机的制冷分支巷道温度降幅5～11℃，湿度降幅20%～30%，工作面温度基本上降到25℃以下，湿度均降到75%以下，取得良好的降温效果。平宝公司通过工程实践为高温矿井的降温提供了可靠的方法。

Practice and demonstration of ground centralized cooling project for deep mine

The coal seam in the Shoushan First Mine lies in the second stage thermal hazard zone. The geothermal gradient above the coal seam floor is 2.63-4.18℃/100m, and the average geothermal gradient is 3.42℃/100m.In order to ensure the physical and mental health of the workers and the production safety of the mine, Pingbao company adopts the ground centralized cooling technology to deal with the thermal hazard of the Shoushan First Mine. In this paper, the cooling effect of the ground centralized cooling system is evaluated by analyzing the cooling effect of each working face in the Shoushan First Mine. The results show that the temperature of the working face decreases by 5-11℃and the humidity decreases by 20-30%. The temperature of the working face basically drops below 25 ℃, and the humidity drops below 75%.The engineering practice of Pingbao company in Shoushan First Mine provides new ideas and methods for the cooling of high temperature mine.