矿井巷道火灾烟流运动理论研究  

Research of Movement Theory of Fire Smoke Flow of Mine Roadway

作　　者：王文才[1] 乔旺[1] 李刚[1] 王瑞智[1] 

机构地区：[1]内蒙古科技大学矿业工程学院,内蒙古包头014010

出　　处：《工矿自动化》2011年第3期22-25,共4页Journal Of Mine Automation

基　　金：国家自然科学基金资助项目(51064018);内蒙古自治区自然科学基金资助项目(2009MS0709);内蒙古自治区高等学校科学研究项目(NJ10093)

摘　　要：煤矿井下发生火灾时会产生大量有毒有害的高温烟流,这些烟流沿着井下巷道流动,对井下工作人员及设备构成严重威胁。针对该问题,研究了倾斜巷道和水平巷道的火灾烟流的运动规律:当火灾发生在上行通风巷道中时,由于火风压和浮力效应的作用,火灾烟流将向火区的下游流动;当火灾发生在下行通风巷道中时,在火灾初期,火风压较小,火灾烟流沿着巷道风流的方向向下运动,随着火势的发展,火风压不断增大,当上游的风速低于临界风速时,火灾烟流向新鲜风流方向流动;在水平巷道火灾前期,节流效应作用不明显,火灾烟流向新鲜风流方向流动,随着火势的发展,节流效应作用增大,当节流效应值和巷道的通风阻力值一样大时,火灾烟流将逆流。该文对巷道火灾的救灾工作具有一定的指导作用。A lot of poisonous and harmful smoke flow with high temperature will be produced when there is a fire in coal mine underground.The smoke flow will move along mine roadway and have serious danger for underground personnel and devices.So the paper researched movement rule of fire smoke flow of inclined roadway and horizontal roadway： when fire happens in upstream ventilating roadway,fire smoke flow will move downstream of fire area because of functions of fire pressure and buoyancy effect;when fire happens in downstream ventilating roadway,fire pressure is smaller at early stage of fire,so fire smoke flow will move downward along direction of air flow of roadway;with increasing of fire,fire pressure increases constantly,fire smoke flow will move along direction of fresh air flow when air speed of upstream is lower than critical air speed;function of throttling effect is not obvious at early stage of fire in horizontal roadway,fire smoke flow will move along direction of fresh air flow;with increasing of fire,function of throttling effect increases,fire smoke flow will make reverse movement when value of throttling effect is as big as value of ventilating resistance of roadway.The paper has certain guilding function for relief work of fire of roadway.

关 键 词：矿井 巷道火灾 烟流 火风压 临界风速 节流效应 

分 类 号：TD672[矿业工程—矿山机电]