泡沫陶瓷对瓦斯爆炸过程影响的实验及机理

The experiments and mechanism of foam ceramics affecting gas explosion process

为了对煤矿瓦斯多次爆炸和连续爆炸实现阻隔爆,利用建立的瓦斯爆炸实验系统,研究了A l2O3和SiC两种材质的泡沫陶瓷对瓦斯爆炸过程的影响规律,利用SEM技术对泡沫陶瓷的细观结构进行了测试,分析了其对瓦斯爆炸的作用机理.结果表明:泡沫陶瓷对瓦斯爆炸最大超压衰减作用明显,最大衰减可达到50%;泡沫陶瓷在细观上具有三维连通网络结构,可以淬熄瓦斯爆炸火焰,抑制爆炸应力峰值和爆炸声波.

In order to find new methods for suppression and isolation of continuous and many-times gas explosions, the rules of two kinds of foam ceramics composed by Al2O3 and SiC affecting gas explosion was studied in laboratory with gas explosion experimental system and micro-structure of foam ceramics was measured by SEM. Moreover mechanism of foam ceramics affecting gas explosions was analyzed. The results show that the foam ceramic attenuates obviously the largest overpressure of gas explosion, which can weaken about 50 percents at the most extend and the foam ceramic has three dimensions connective micro-network structures to quench gas explosion flame and weaken pressure peak value and shock wave of gas explosion.