管道内障碍物形状对瓦斯爆炸影响的试验研究

为了预防和降低瓦斯爆炸造成的危害，利用自制的水平管道式可燃气体一粉尘爆炸装置模拟矿井巷道，在常温常压下，使用4种不同形状的障碍物，研究瓦斯爆炸压力和火焰传播速度的变化规律。结果表明：障碍物的存在对瓦斯爆炸具有显著影响，增大了爆炸压力和火焰传播速度，改变了爆炸压力变化规律。障碍物形状对瓦斯爆炸影响程度不同，即挡板障碍物使得爆炸压力和火焰传播速度最大，4孔圆环影响最小。

Experiment Study on Obstacle Shape in Pipeline Affected to Gas Explosion

In order to prevent and reduce the damages caused by mine gas explosions,the self made horizontal pipeline type flammable gas-dust explosion device was applied to simulate the mine roadway.Under the normal atmospheric temperature and constant pressure,there were four different shape obstacles applied to study the variation laws of the gas explosion pressure and flame spreading velocity.The results showed that the obstacle existed would have obvious influences to the gas explosion,would increase the explosion pressure and flame spreading velocity and would change the variation law of the explosion pressure.The obstacle shape could have the different degree influence to the gas explosion.The dam board obstacle could make the highest explosion pressure and flame spreading velocity.The four bore ring would have a min influence.