煤矿井下爆炸烟气动态稀释规律研究

煤矿井下瓦斯爆炸后会产生大量有毒有害的高温烟气,在未引起火灾或二次爆炸的情况下,这些烟气会在矿井通风的影响下,其浓度、温度呈一定规律不断下降,直至趋近于井下正常风流。将爆炸后烟气区看作一“衰变火源”,通过分析烟气稀释的实际情况建立了“火源区域”烟气稀释的物理模型,并分两个阶段分别推导出“火源区域”释放出的烟气浓度、温度随时间变化的规律,为进一步利用MFIRE火灾模拟软件对爆炸烟流稀释的网络模拟提供技术基础。

Study of Dynamic Dilution Regularity of Underground Explosion Smoke in Coal Mine

The explosion can produce a great deal of hot and poisonous smoke.If the explosion can't cause fire or another explosion,the concentration and temperature of the smoke produced by the explosion will be gradually diluted under the effect of mine ventilation, and will be similar with the normal airflow in the end .In the author's mean that the smoke produced by the explosion is like a decaying fire. The author analyzed the dilution of the smoke and founded the physical model of the dilution. There are two steps to deduce the laws of changing about the smoke's concentration and temperature. We can use the result to advance the MFIRE on simulating the smoke dilution produced by the explosi