巷道火灾对通风系统影响的全尺寸实验与模拟  

Full-scale experimental and simulation study of the influences of laneway fire on ventilation system

作　　者：姚勇征 张文明[2] 吴兵[1] 雷柏伟[1] 陈新宇 孟昱 YAO Yongzheng;ZHANG Wenming;WU Bing;LEI Bowei;CHEN Xinyu;MENG Yu(School of Emergency Management and Safety Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;National Mine Emergency Rescue Team of Kailuan,Kailuan(Group)Limited Liability Corporation,Tangshan,Hebei 063000,China)

机构地区：[1]中国矿业大学(北京)应急管理与安全工程学院,北京100083 [2]开滦(集团)有限责任公司国家矿山应急救援开滦队,河北唐山063000

出　　处：《中国矿业大学学报》2021年第4期709-715,共7页Journal of China University of Mining & Technology

基　　金：国家重点研发计划项目(2018YFC0808100)。

摘　　要：井下巷道火灾会改变通风系统正常运转而威胁矿井安全生产,为了探索巷道火灾对整个矿井通风系统的影响,开展全尺寸巷道实验,并结合数值模拟对U型工作面进风巷火灾特点进行研究.结果表明:该火灾燃烧状态为燃料控制型,但在火灾初期产生了较高的CO浓度,这主要与皮带的特殊燃烧行为有关;烟气温度纵向衰减不具有连续性,每次烟气撞击转弯端墙后,温度会迅速衰减,最终烟气沿整个巷道横断面蔓延,危险性显著增加;该巷道火灾中浮力效应远大于节流效应,对通风系统的影响占主导作用.初步研究结果表明巷道火灾对矿井通风系统具有较大影响,风流和烟流输运规律复杂,且影响因素多,其火灾安全问题值得高度关注.Underground laneway fire can threaten mine safety production by changing the normal operation of ventilation system.In order to explore the influences of laneway fire on the whole mine ventilation system,full-scale experimental study and numerical simulation were adopted to study the fire characteristics of intake laneway in a U-shaped working face.The results show that the combustion state of the fire is fuel-controlled,but a higher CO concentration is produced at the beginning stage of the fire,which is related to the special combustion behavior of the belt.The longitudinal attenuation of smoke temperature is not continuous.After smoke hits the turning end wall,the temperature will decay rapidly.Finally,the smoke spreads along the whole laneway cross-section,and therefore the risk increases significantly.The buoyancy effect is much greater than the throttling effect in this laneway fire,and its influence on the ventilation system plays a leading role.The preliminary research results show that the laneway fire has great influence on mine ventilation system with many influencing factors,and the transportation law of airflow and smoke flow is complex.The fire safety problems are worthy of further investigation.

关 键 词：矿井火灾 通风系统 烟气输运 全尺寸实验 数值模拟 

分 类 号：TD752[矿业工程—矿井通风与安全]