To address the issues of heat and humidity hazards, as well as insufficient air volume in deep mining operations, a novel cooling method combining spray and chord grid is proposed. To investigate the cooling dynamics, an experimental platform integrating both spray and chord grid components is independently developed. Field boundary conditions are simulated to conduct orthogonal experimental research. Under the experimental parameters of an inlet air temperature of 32 °C, relative humidity of 88 %, and initial spray water temperature of 26 °C, the effects of water-air ratio, nozzle distance, and other parameters on inlet and outlet temperature, as well as moisture content, are quantified. These influencing factors are analyzed through range analysis. Results demonstrate that the water-air ratio has a greater impact on cooling compared to the nozzle distance. Notably, when the water-air ratio and nozzle distance reach critical values of 0.6 and 70 cm respectively, the cooling rate begins to plateau. Furthermore, comparative analysis of the cooling and dehumidification effects of single spray versus spray + chord grid reveals that the cooling capacity of single spray systems can be surpassed by incorporating a chord grid. Specifically, the combination of spray + chord grid achieves superior cooling effects with lower water consumption.

中文翻译：

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喷淋与弦栅相结合的矿井冷却风阶冷却实验研究

针对深部采矿作业中高温、潮湿和风量不足的问题，提出了一种喷淋和弦栅相结合的新型冷却方法。为了研究冷却动力学，自主开发了集成喷雾和弦网格组件的实验平台。模拟现场边界条件，进行正交实验研究。在进风温度32℃、相对湿度88%、初始喷水温度26℃的实验参数下，水气比、喷嘴距离等参数对进、出口温度的影响，以及水分含量，都被量化。通过极差分析对这些影响因素进行分析。结果表明，与喷嘴距离相比，水-空气比对冷却的影响更大。值得注意的是，当水-空气比和喷嘴距离分别达到 0.6 和 70 cm 的临界值时，冷却速率开始趋于稳定。此外，对单喷淋与喷淋+弦栅的冷却除湿效果的对比分析表明，采用弦栅可以超越单喷淋系统的冷却能力。具体来说，喷淋+弦栅的组合，以更低的耗水量实现了优越的冷却效果。