瓦斯、煤尘共存条件下爆炸极限变化规律实验研究  

Experimental study on the explosion limits change laws under gas and coal dust coexisting conditions

作　　者：王磊 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400039

出　　处：《中国矿业》2016年第4期87-90,共4页China Mining Magazine

基　　金：国家自然科学基金项目资助(编号:51374235;51274238);中煤科工集团重庆研究院有限公司自立科研开发项目资助(编号:2013YBXM14)

摘　　要：采用20L近球形爆炸特性测试系统对瓦斯、煤尘共存条件下爆炸极限变化规律进行了实验研究。研究发现:在本实验条件下,煤尘的爆炸下限浓度随瓦斯浓度的增加而逐渐下降,纯煤尘时的爆炸下限浓度是28.4g/m3,当加入1.70%浓度瓦斯时,煤尘爆炸下限浓度下降到7.8g/m3,且煤尘爆炸下限与瓦斯浓度呈指数函数关系变化;瓦斯的爆炸极限随煤尘浓度的增加发生改变,且与煤尘浓度呈不同的指数函数关系;纯瓦斯的爆炸上限为15.8%,而加入100g/m3的煤尘后瓦斯的爆炸上限下降到了12.8%;瓦斯的爆炸下限随煤尘浓度的增加逐渐下降,纯瓦斯的爆炸下限为5.10%,而加入100g/m3的煤尘后瓦斯的爆炸下限下降到了3.1%。研究结果为煤矿井下瓦斯煤尘爆炸事故的防治提供理论依据。Using 20L nearly spherical explosion characteristic test system,studied the change laws of explosion limits under gas and coal dust coexisting conditions. The study found that： under the experimental conditions,coal dust lower explosion limit decreases with the increase of the gas concentration, pure coal dust lower explosion limit is 28.4g/m3 , while adding 1.70 % gas its lower explosion limit down to 7.8g/m3 , coal dust lower explosion limit and gas concentration are exponential relationship; gas upper explosion limit alters with the increase of the coal dust concentration, pure gas upper explosion limit is 15.8 % ,while adding 100g/m3 dust its upper explosion limit down to 12.8% ;gas lower explosion limit decreases with the increase of the coal dust concentration,pure gas lower explosion limit is 5.10% ,while adding 100g/ms dust its lower explosion limit down to 3. 10%;gas upper explosion limit and lower explosion limit were exponential function relationship with coal dust concentration. The study results provided a theoretical basis for the prevention and control of coal mine gas and coal dust explosion accidents.

关 键 词：瓦斯爆炸 煤尘爆炸 共存条件 爆炸极限 

分 类 号：TD12[矿业工程—矿山地质测量]