本文選題：安全 + 火災(zāi)模擬　； 參考：《防災(zāi)減災(zāi)工程學(xué)報(bào)》2017年02期

【摘要】：井下事故中礦井火災(zāi)是最嚴(yán)重的事故類型之一。為更好地控制火災(zāi)時(shí)期風(fēng)流的擴(kuò)散以及相關(guān)應(yīng)急預(yù)案的制定,利用Ventsim可視化通風(fēng)軟件建立金屬礦山通風(fēng)系統(tǒng)三維模型。研究結(jié)果表明:相同燃燒環(huán)境下,不同材料燃燒產(chǎn)生的CO濃度呈現(xiàn)相同變化趨勢:先增加后減少,然后增加至最大值,最后減小并趨近零。橡膠、柴油、干木柴燃燒釋放的CO濃度最高約至13003、12742、8779ppm,可見橡膠產(chǎn)生的CO濃度明顯高于柴油和木柴;熱釋放量方面,柴油燃燒釋放的熱量最高約至26500kW,明顯高于木柴和橡膠;距離火源不同地點(diǎn)熱和CO隨時(shí)間變化規(guī)律不同,其中與回風(fēng)巷直接相連的巷道因熱膨脹等因素造成風(fēng)流逆向,其CO氣體在火災(zāi)中期出現(xiàn)濃度趨近于零的現(xiàn)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.
【作者單位】： 中南大學(xué)資源與安全工程學(xué)院;
【基金】：研究生創(chuàng)新基金項(xiàng)目(2015zzts263) 湖南省科技重大專項(xiàng)計(jì)劃(2011FJ1003-3) 國家自然科學(xué)基金(青年基金)項(xiàng)目(5120420)資助
【分類號(hào)】：TD752
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本文編號(hào)：1898011