Tang Wei, Bahrami Davood, Yuan Liming, Thomas Richard, Soles John
National Institute for Occupational Safety and Health (NIOSH), 626 Cochran Mill Road, Pittsburgh, PA 15236, USA.
Min Metall Explor. 2022 May 4;39(3):961-968. doi: 10.1007/s42461-022-00609-w.
Mine equipment fires remain as one of the most concerning safety issues in the mining industry, and most equipment fires were caused by hot surface ignitions. Detailed experimental investigations were conducted at the NIOSH Pittsburgh Mining Research Division on hot surface ignition of liquid fuels under ventilation in a mining environment. Three types of metal surface materials (stainless steel, cast iron, carbon steel), three types of liquids (diesel fuel, hydraulic fluid, engine oil), four air ventilation speeds (0, 0.5, 1.5, 3 m/s) were used to study the hot surface ignition probability under these conditions. Visual observation and thermocouples attached on the metal surface were used to indicate the hot surface ignition from the measured temperatures. Results show that the type of metal has a noticeable effect on the hot surface ignition, while ventilation speed has a mixed influence on ignition. Different types of liquid fuels also show different ranges of ignition temperatures. Results from this work can be used to help understand equipment mine fires and develop mitigation strategies.
矿山设备火灾仍然是采矿业最令人担忧的安全问题之一，而且大多数设备火灾是由热表面点火引起的。美国国家职业安全与健康研究所匹兹堡采矿研究部在采矿环境通风条件下，对液体燃料的热表面点火进行了详细的实验研究。使用三种金属表面材料（不锈钢、铸铁、碳钢）、三种液体（柴油、液压油、发动机油）、四种空气通风速度（0、0.5、1.5、3米/秒）来研究这些条件下的热表面点火概率。通过视觉观察和附着在金属表面的热电偶，根据测量温度来指示热表面点火情况。结果表明，金属类型对热表面点火有显著影响，而通风速度对点火有混合影响。不同类型的液体燃料也显示出不同的点火温度范围。这项工作的结果可用于帮助理解矿山设备火灾并制定缓解策略。
