煤矿其他可燃气体对空气中甲烷爆炸极限的影响

Influence of various other flammable gases in coal mine on explosion limits of methane

为研究矿井火区中一氧化碳(CO),氢气(H2),乙烯(C2H4)和乙烷(C2H6)等可燃气体对空气中甲烷(CH4)爆炸极限和爆炸危险度(F值)的影响及双组份可燃气体爆炸界限和爆炸危险度的变化,采用空气中可燃气体爆炸极限测定方法完成一系列试验,测定加入不同体积分数其他可燃气体时CH4的爆炸极限。其他可燃气体的加入,均使空气中CH4和混合可燃气体的爆炸界限加宽;同时加大了CH4和混合可燃气体的爆炸危险度。试验结果表明:加入C2H4气体对CH4爆炸极限影响较大,使CH4及其双组份混合气体的爆炸危险度明显增大;加入量为2.0%时,CH4的F值增加了540%。而加入CO气体比加入C2H6,C2H4和H2等气体对CH4及混合气体的爆炸极限影响都小。

To study the influence of different combustible gases CO,H2,C2H4 and C2H6in mine fire area on explosion limits of CH4 in air,the degree of explosion danger（ F value）,the changes of explosion width and F value of two-component mixed combustible gases,experiments were carried out by using the method of test for explosion limits of combustible gases in air. The results show that as combustible gases are added,the methane explosion limits are all widened and the F values become bigger,that addition of C2H4 makes the explosion danger of methane and two-component increase obviously,that when addition is2. 0%,methane F value increases by 540%,and that the effect of CO is minimal.