Abstract A combined experimental and numerical study was performed to improve the performance of the ventilation system in a mine refuge chamber (MRC). In the experiment, CO2 cylinders and dispersion pipes were used to simulate the CO2 release of 50 people, and 0.1 L/min per person of fresh air was provided by an air compressor. A new analytical model for a 50-person MRC was proposed and validated against the experimental data. Sensitivity analysis was carried out to investigate the effects of several control factors. The results indicated the following: (1) The ventilation system layout has a significant influence on the CO2 concentration distribution in an MRC, while the uniformity of the CO2 concentration distribution in the MRC may not be effective with increased number of air inlets. (2) Under a well-arranged ventilation system in the 50-person MRC, the average CO2 concentration can be controlled at less than 0.5 % with a ventilation rate of 0.1 m3/min per person, and less than 0.2 % with a ventilation rate of 0.3 m3/min per person. (3) A quantitative correlation exists between the CO2 concentration and ventilation volume rate, as well as the CO2 release rate, for an MRC under a well-arranged ventilation system.

中文翻译：

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带压空气管道通风的矿井避难室空气质量控制

摘要 为了提高矿井避难室 (MRC) 通风系统的性能，进行了实验和数值相结合的研究。实验中使用CO2钢瓶和分散管模拟50人的CO2释放量，每人0.1L/min的新鲜空气由空压机提供。针对 50 人 MRC 提出了一种新的分析模型，并根据实验数据进行了验证。进行敏感性分析以研究几个控制因素的影响。结果表明： (1) 通风系统布局对 MRC 中 CO2 浓度分布有显着影响，而 MRC 中 CO2 浓度分布的均匀性可能随着进气口数量的增加而无效。(2) 50人MRC通风系统布局合理，平均CO2浓度可控制在0.5%以下，每人0.1m3/min的通风量，0.2%以下的通风量每人 0.3 立方米/分钟。(3) 通风系统布置良好的 MRC，其 CO2 浓度与通风容积率以及 CO2 释放率之间存在定量相关性。