高抽巷抽采情况下巷道进风量对采空区自燃危险性的影响研究  

Study on the influence of roadway air intake on the risk of spontaneous combustion in goaf under the condition of high drainage roadway mining

作　　者：李昊 张驰 Li Hao;Zhang Chi(High-tech Branch of Shaanxi Coal Industry and Chemical Technology Research Institute Corporation Ltd.,Xi'an 710077,China;Xiangshan Mine,Hancheng Mining Company,Hancheng 715400,China)

机构地区：[1]陕西煤业化工技术研究院有限责任公司高新分公司,陕西西安710077 [2]韩城矿业公司象山煤矿,陕西韩城715400

出　　处：《煤炭与化工》2020年第1期93-96,共4页Coal and Chemical Industry

摘　　要：为了解决高抽巷抽采条件下工作面不同进风量可能导致的采空区自燃和瓦斯防治效果相互影响的问题,研究不同进风条件下采空区的煤自燃危险性变化和抽采瓦斯效果之间的关系。本文以大佛寺矿主采煤层工作面建立采空区气体渗流模型,通过数值模拟软件研究不同的进风风量对采空区自燃危险性和瓦斯防治效果的影响。结果表明,工作面进风量增加时,采空区内的瓦斯浓度降低,氧化升温带的宽度变大,采空区自燃危险性升高,且当进风巷风速为1~1.25 m/s时效果最佳。In order to solve the problem of the mutual influence between the spontaneous combustion of goaf and the effect of gas prevention and control caused by different air intake in working face under the condition of high extraction roadway extraction,the relationship between the gas effect and the change of coal spontaneous combustion risk and extraction in the goaf under different intake conditions was studied.In this paper,a gas seepage model of the goaf in a main coal seam of a mine was established,and numerical simulation software was used to study the influence of different intake air volumes on the risk of spontaneous combustion and gas prevention in the goaf.The results showed that the gas concentration in the goaf decreased with the increase of the air intake in the working face,the width of the oxidized temperature rise zone increased,and the risk of spontaneous combustion in the goaf increases.And when the wind speed of the intake roadway was 1 m/s^1.25 m/s,the effect was the best.

关 键 词：高抽巷 进风量 瓦斯浓度 采空区自燃 数值模拟 

分 类 号：TD712[矿业工程—矿井通风与安全]