工作面回撤期间封闭和注液氮防灭火技术  

Fire Prevention and Control Technology with Sealing and Liquid Nitrogen Injection During Withdrawing Period of Coal Mining Face

作　　者：丁永禄 董伟[1] 郝军[1] 

机构地区：[1]神华宁夏煤业集团有限责任公司羊场湾煤矿,宁夏银川750002

出　　处：《煤炭科学技术》2013年第2期49-51,55,共4页Coal Science and Technology

基　　金："十一五"国家科技支撑计划资助项目(2008BAB33B03)

摘　　要：针对羊场湾煤矿Y252防灭火措施巷开采的2号煤层回撤期间采空区煤炭自燃问题,采用工作面封闭和注液氮的方法,对羊场湾煤矿Y252工作面回撤期间进行防灭火研究。结果表明:经过封闭和注液氮,CO体积分数从0.008%降至0.002%,乙烯体积分数由0.002%降低至0,温度由注液氮前的29℃下降至25℃,说明通过向采空区内注液氮能很快消灭采空区内的高温点,有效抑制采空区内的遗煤氧化,防灭火效果显著。According to the coal spontaneous combustion in goal during No.Y252 coal mining face withdrawing from No.2 seam, a sealing and liquid nitrogen injection method of the coal mining face was applied to study on the fire prevention and control during the withdrawing period of No.Y252 coal mining face in Yangehangwan Mine.The results showed that after sealing and liquid nitrogen injection the CO vol- ume fraction reduced from 0.008% to 0.002% ,the ethylene volume fraction reduced from 0.002% to O and the temperature reduced from 29℃ before the liquid nitrogen injected to 25℃ .With the liquid nitrogen injection in the goaf to rapidly eliminate the high temperature points in the goaf,the oxidation of coal left in the goaf could be effectively restrained and the fire extinguishing role effect was remarkable.

关 键 词：综放工作面 工作面回撤 注液氮 防灭火 遗煤 

分 类 号：TD75[矿业工程—矿井通风与安全]