矿井火区可燃性混合气体爆炸三角形判断法及其爆炸危险性分析

Explosion Triangle of Mixed Inflammable Gases and Explosion Risk Analysis in the Mine Fire District

矿井火区可燃性混合气体爆炸危险性的判断 ,目前常用单纯的瓦斯爆炸三角形判别法。此法对实际的判断往往未综合考虑火区温度的影响。为此 ,笔者论述了矿井火区多种可燃性气体同时存在时 ,其混合气体爆炸三角形各参数的工程计算方法 :爆炸界限可用 Le Chatelier法 ,但需根据火区实测温度进行修正 ;爆炸时的临界氧浓度 ,则需用另一种三角形图示法予以确定。由此画出的混合气体爆炸三角形分析图 ,可用于矿井火区 ,尤其是矿井大面积火区的密闭和启封过程中 ,作为可燃性混合气体爆炸危险性的综合判断及其防爆措施的制定 。

Methane explosion triangle method, which is commonly applied to judge the explosion risk of mixed inflammable gases in the mine fire district, considers only the main component gas. In practice, the method does not consider the influence of the temperature in the mine fire district. In this paper, an engineering calculation method for determining parameters of mixed inflammable gases is presented. Explosion limits could be decided by Le Chatelier method and corrected by measured temperature in situ of the fire district. Critical oxygen concentration for explosion is decided by a new triangle illustration method. This mixed gases explosion triangle analytical illustration could be applied to the mine fire district, especially to long range mine fire district during closing and opening process to judge the explosion risk of mixed inflammable gases and to formulate measures for prevention.