矿井瓦斯爆炸后巷道空气温度分布规律

结合气体爆炸动力学弱冲击波爆炸理论等知识,建立了爆炸后的超压、温度随距点火源距离变化的非线性计算公式,并把超压计算值和实验值进行了对比.结果表明:对于体积分数分别为5.0%,7.5%,9.5%的100 m3瓦斯爆炸后的巷道内大气温度变化范围分别是:582.5~309.7,709.2~315.2,825.0~320.0 K;对于体积分数分别为5.0%,7.5%,9.5%的200 m3瓦斯爆炸后的巷道内大气温度变化范围分别是:688.3~314.3,867.4~321.8,1 028.4~328.3 K.爆炸后的温度随着距离的增加先迅速递减后平缓降低到矿井正常空气温度,随着爆源的体积分数、体积的增加所产生的最高温度越高,温度变化范围越大.

Temperature Distribution in Lane-way Air After Mine Methane Explosions

Gas explosion dynamics and weak explosion theory were used to study the overpressure and temperature after an explosion as a function of distance from the fire source. The o verpressure values were compared to experimental results. The ignition of 100 m3 of methane in air (5% , 7. 5% or 9. 5% methane) results in a temperature change of 582.5 -309. 7, 709. 2 - 315.2 or 825.0 - 320.0 K. The changes were 688. 3-314. 3, 867. 4 - 321. 8 or 1 028. 4 - 328. 3 K after ignition of 200 m3 of methane-air mixture. After the explosion the temperature drops rapidly at first and then slowly decreases to the normal temperature of the lane-way air. The maximum temperatures are higher when the concentration and volume of the methane is higher. At the same time the difference in temperature becomes greater, too.