高瓦斯矿发火区封闭时对瓦斯爆炸界限因素的影响  

Influences of sealing fire zone in high gas mine on impact factors of gas explosion limits

作　　者：周西华[1,2] 孟乐[1] 史美静[1] 郭梁辉[1] 赵建元[1] 冯寸寸[1] 

机构地区：[1]辽宁工程技术大学安全科学与工程学院,辽宁阜新123000 [2]辽宁工程技术大学矿山热动力灾害与防治教育部重点实验室,辽宁阜新123000

出　　处：《爆炸与冲击》2013年第4期351-356,共6页Explosion and Shock Waves

基　　金：国家自然科学基金项目(51274115);"十一五"国家科技支撑计划项目(2006BAK03B-05);辽宁省自然科学基金项目(20092199);辽宁省教育厅基金项目(20060389)~~

摘　　要：针对高瓦斯矿发火区封闭时常发生瓦斯爆炸事故,对影响瓦斯爆炸界限的因素进行实验,探索温度、压力、可燃气体(CO)、惰性气体(N2和CO2)等条件对瓦斯爆炸界限的影响规律。得出常温常压下瓦斯爆炸的体积分数下限为5%,瓦斯爆炸上限为13.5%,以及CO2的惰化效果比N2更好的结论。根据实验数据绘制混合气体的爆炸三角形,并进行新的惰化分区划分,不仅为火区封闭时防治瓦斯爆炸提供新的技术途径,而且能计算出使火区惰化时,所需惰性气体量,可对这些因素进行合理控制,有效地降低瓦斯爆炸危险性。Aimed at the problem of gas explosion in coal mine after sealing the fire zone, experiments were conducted to analyze the impact factors of gas explosion limits including temperature, pressure, combustible gas （CO） and inert gas （N2 and CO2）. The experimental results show that at normal temperature and pressure, the lower gas explosion limit is at the methane volume fraction of 5 percent and the upper gas explosion limit is at the methane volume fraction of 13.5 percent. And CO2 has greater inerting effect than N2. According to the experimental data, a new explosion triangle of mixed inflammable gases is rebuilt and the inerting regions were newly divided, which can provide a new method to prevent gas explosion after sealing the fire region. Amount of inert gas which needed to en- sure against explosion can be calculated by the explosion triangle. Meanwhile, properly controlling the impact factors can decrease the risk of gas explosion.

关 键 词：爆炸力学 爆炸三角形 瓦斯爆炸 惰化分区 可燃气体 惰性气体 

分 类 号：O381[理学—流体力学] X932[理学—力学]