地面钻孔液氮直注式防灭火技术在灵新煤矿的应用  

Application of Surface Drilling Liquid Nitrogen Immediate Injection Fire Preventing and Extinguishing Technique in Lingxin Coal Mine

作　　者：钱钧[1] 周光华[1] 刘洪刚[1] 马灵军[1] 武书泉[1] 秦雷[2] 

机构地区：[1]神华宁夏煤业集团有限责任公司,宁夏银川750011 [2]中国矿业大学安全工程学院,江苏徐州221116

出　　处：《煤矿安全》2015年第9期137-140,共4页Safety in Coal Mines

基　　金："十二五"国家科技支撑计划资助项目(2013BAK06B06);江苏省"333高层次人才培养工程"专项资助项目(BRA2012134)

摘　　要：灵新煤矿L5216综采工作面开采煤层属于自然发火煤层,且工作面与上部多层采空区相互连通形成复杂的立体交叉漏风网,周围采空区遗煤高温自燃氧化产生的大量CO受负压影响通过裂隙扩散到L5216工作面,造成本工作面火灾形势严峻,防治难度大,严重影响了L5216综采工作面的安全生产。针对L5216工作面实际情况,采取地面钻孔多通道、大流量、直注式液氮防灭火技术,有效消除或减小了采空区内的高温氧化区。The coal of L5216 mechanized mining face in Lingxin Coal Mine is easy to appear spontaneous combustion. The working face interconnects with the upper multilayer gobs to form complex air leakage network. CO generated by high temperature oxidation of coal pillar,spreads to L5216 working face through cracks by the negative impact,which causes mined- out area severe fire situation and affects L5216 mechanized mining face production safety. Specific to the actual situation of L5216 mechanized mining face,the immediately ground drilling liquid nitrogen injection for fire extinguishing is employed. The ground drilling liquid nitrogen injection with multi- channel,big flow,direct injection for fire extinguishing eliminates the high temperature oxidation of gob effectively.

关 键 词：煤炭自燃 地面钻孔 液氮 防灭火 CO置换 

分 类 号：TD752.2[矿业工程—矿井通风与安全]