基于Ventsim的井下火灾模拟研究

发布时间：2018-05-16 18:50

  本文选题：安全 + 火灾模拟　； 参考：《防灾减灾工程学报》2017年02期

【摘要】：井下事故中矿井火灾是最严重的事故类型之一。为更好地控制火灾时期风流的扩散以及相关应急预案的制定,利用Ventsim可视化通风软件建立金属矿山通风系统三维模型。研究结果表明:相同燃烧环境下,不同材料燃烧产生的CO浓度呈现相同变化趋势:先增加后减少,然后增加至最大值,最后减小并趋近零。橡胶、柴油、干木柴燃烧释放的CO浓度最高约至13003、12742、8779ppm,可见橡胶产生的CO浓度明显高于柴油和木柴;热释放量方面,柴油燃烧释放的热量最高约至26500kW,明显高于木柴和橡胶;距离火源不同地点热和CO随时间变化规律不同,其中与回风巷直接相连的巷道因热膨胀等因素造成风流逆向,其CO气体在火灾中期出现浓度趋近于零的现象。
[Abstract]:Mine fire is one of the most serious accidents. In order to better control the diffusion of wind flow during fire and the formulation of emergency plan, the three-dimensional model of ventilation system in metal mines was established by using Ventsim visual ventilation software. The results show that under the same combustion environment, the CO concentration produced by different materials shows the same changing trend: first increasing, then decreasing, then increasing to the maximum value, finally decreasing and approaching zero. The highest CO concentration of rubber, diesel and dry firewood was about 13003U 12742U 8779ppm.The CO concentration produced by rubber was obviously higher than that of diesel oil and firewood, and the heat released by diesel combustion was about 26500kW, which was obviously higher than that of firewood and rubber. The variation of heat and CO with time varies from different locations of the fire source, in which the air flow is reverse caused by thermal expansion in the roadway directly connected with the return air lane, and the concentration of CO gas approaches zero in the middle of the fire.
【作者单位】： 中南大学资源与安全工程学院;
【基金】：研究生创新基金项目(2015zzts263) 湖南省科技重大专项计划(2011FJ1003-3) 国家自然科学基金(青年基金)项目(5120420)资助
【分类号】：TD752
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本文编号：1898011