煤矿高温多湿掘进巷道制冷负荷计算及降温技术
Temperature distribution law and cooling simulation of high temperature tunneling roadway
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摘要: 针对煤矿掘进工作面高温多湿的问题，对掘进工作面热量分布规律展开研究，对比分析焓差法和西格玛热差法计算供风量；基于此，科学制定机械制冷降温方案，并采用数值模拟方法对降温效果进行了验证。结果表明：西格玛热计算供风量较传统焓差法更为精确，可以为高温热害巷道提供更合理的供风方案，具体为22.4 kg/s，即1 041.6 m3/min；RWK350空冷器在常见的10 m与15 m 2种风筒出口位置均可实现有效降温，满足《煤矿安全规程》规定的要求，改善掘进巷道热环境。Abstract: Aiming at the problems of high temperature and high humidity in coal mining facing, this paper studies the heat distribution law of coal mining facing, compares and analyzes the enthalpy difference method and Sigma thermal difference method to calculate the air supply volume. Based on this, mechanical cooling scheme is scientifically formulated, and the cooling effect is verified by numerical simulation method. The results show that: the air supply calculated by Sigma heat is more accurate than that by traditional enthalpy difference method, and the air supply is 22.4 kg/s, that is, 1 041.6 m3/min. It can be seen from the simulation results that the RWK350 air cooler can achieve effective cooling below the Coal Mine Safety Regulations at both the common 10 m and 15 m air duct outlet locations, thus achieving effective cooling of the driving roadway.
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