不同煤种对瓦斯煤尘爆炸影响的实验研究

为了进一步探究不同煤种参与的瓦斯煤尘爆炸的传播规律,选取3种具有代表性的煤尘在自制的半封闭管道内进行试验,主要研究了瓦斯煤尘爆炸火焰传播速度、火焰面发光强度和最大爆炸压力。研究结果表明:瓦斯煤尘爆炸的最大爆炸压力和火焰传播速度皆随着煤尘浓度的增加呈先上升后下降的趋势;存在着一个最佳的瓦斯浓度和煤尘浓度,使火焰传播速度达到最大,发光强度也达到最大;火焰传播速度、最大爆炸压力和爆炸产生的发光强度都是按褐煤、烟煤、无烟煤依次降低。

Experimental Study on the Influence of Different Coal Species on Gas and Coal Dust Explosion

To further explore the propagation law of gas coal dust explosion with different coal species involved,3 kinds of representative coal dust were tested in a self-made semi-enclosed pipe,and the flame propagation speed,flame surface luminescence intensity and maximum explosion pressure of gas coal dust explosion were studied.The results show that the maximum explosion pressure and flame propagation velocity of gas coal dust explosion rise first and then decrease with the increase of coal dust concentration,and there is an optimal gas concentration and coal dust concentration,which makes the flame propagation speed reach the maximum and the luminous intensity reach the maximum;flame propagation speed,the maximum explosion pressure and the luminous intensity produced by the explosion are reduced by lignite,bituminous coal and anthracite in turn.