高挥发分煤尘对瓦斯爆炸极限的影响  

Influence of High Volatile Coal Dust on Gas Explosion Limits

作　　者：姜海鹏 司荣军 李润之 

机构地区：[1]中煤科工集团重庆研究院有限公司,重庆400037

出　　处：《煤矿安全》2015年第8期174-177,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51374235);重庆市前沿与应用基础研究计划基金资助项目(cstc2014jcyj A90001)

摘　　要：瓦斯爆炸是影响煤矿安全生产的重大灾害之一,煤尘的存在会影响瓦斯的爆炸极限。运用20 L爆炸特性测试系统研究了高挥发分煤尘对瓦斯爆炸极限的影响,并对实验煤样在40-260℃进行了析出气体分析。实验结果表明：在有煤尘参与的条件下,瓦斯爆炸上限变得更低,当加入100 g/m^3煤尘后,瓦斯爆炸上限下降到了12.8%。在爆炸下限附近,煤尘对瓦斯爆炸有促进作用,煤尘的存在使得瓦斯爆炸下限会变得更低,加入100 g/m^3煤尘后,瓦斯爆炸的下限下降到了3.1%。The gas explosion is one of the major disasters influencing the coal mine safety in production,coal dust can influence gas explosion limits. The influence to explosion limits of gas by high volatile coal dust was studied with 20 L spherical vessel. The experimental results showed that the explosion limits of gas would become quite lower when coal dust participated; and the explosion limits decreased to 12. 8% when the 100 g / m^3 coal dust was mixed into the sample. Near the lower explosion limits,coal dust can stimulate gas explosion,the explosion limits of gas would become quite lower too,when coal dust participated,and the explosion limits decreased to3. 1% when the 100 g / m^3 coal dust was mixed into the sample.

关 键 词：瓦斯煤尘共存 爆炸极限 瓦斯爆炸 高挥发分 煤尘浓度 

分 类 号：TD712.7[矿业工程—矿井通风与安全]