“两进一回”通风工作面采空区煤自燃区域分布规律  

Distribution Law of Coal Spontaneous Combustion Zone in Goaf of Two Intake and One Return Ventilation Working Face

作　　者：杜阳 戚绪尧[1,2] 翁旭泽 郝建峰 陈瑞峰 陈岳振 DU Yang;QI Xuyao;WENG Xuze;HAO Jianfeng;CHEN Ruifeng;CHEN Yuezhen(School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China;Key Laboratory of Gas and Fire Control for Coal Mines,China University of Mining and Technology,Xuzhou 221116,China;Datong Coal Mine Group Tashan Company,Datong 037000,China)

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221116 [2]中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室,江苏徐州221116 [3]同煤集团塔山煤矿公司,山西大同037000

出　　处：《煤矿安全》2020年第2期188-191,共4页Safety in Coal Mines

基　　金：国家重点研发计划资助项目(2016YFC0801800);国家自然科学基金资助项目(51774275,U1810106);江苏省自然科学基金面上资助项目(BK20161183).

摘　　要：为研究"两进一回"通风工作面采空区煤自燃区域分布规律,模拟分析了塔山煤矿8301工作面回采期间不同工况下采空区氧气浓度,确定了煤自燃危险区域并提出相应防灭火措施。结果表明:"两进一回"通风工作面采空区煤自燃危险区域较大,自燃带在回采长度为150 m时达到96 m;注氮可大幅度改变采空区内自燃"三带"分布,减小采空区煤自燃危险区域。针对"两进一回"通风工作面,应考虑在采空区两侧注氮;增加风量可使自燃带边界向采空区深部延伸,且加大其前端距工作面的距离。To study the distribution law of coal spontaneous combustion zone in goaf of two intake and one return ventilation working face,the oxygen concentration under different working conditions during the mining of the 8301 working face of Tashan Coal Mine was simulated,the danger zone of spontaneous combustion of coal was determined and corresponding fire prevention measures were proposed.The spontaneous combustion danger zone of coal in the goaf of two intake and one return ventilation working face is large,and the spontaneous combustion zone reaches 96 m when the mining distance is 150 m;nitrogen injection can greatly change the distribution of spontaneous combustion zones and reduce the spontaneous combustion of coal in the goaf.For the two intake and one return ventilation working face,nitrogen injection should be considered on both sides of the goaf;increasing air volume allows the boundary of the spontaneous combustion zone to extend deep into the goaf and increase the distance of the front end from the working face.

关 键 词：两进一回 采空区 煤自燃区域 风量 注氮 

分 类 号：TD752.2[矿业工程—矿井通风与安全]