摘要
为了研究综放工作面上隅角瓦斯超限原因及提高工作面上隅角瓦斯超限治理效果,以保德煤矿81505工作面为研究对象,结合工作面回采工艺参数,提出了偏Y型通风方式,利用有限元软件FLUENT模拟研究了工作面采空区瓦斯流场分布特点,在此基础上提出了大直径水平钻孔抽采采空区瓦斯工艺:即在备采工作面上顺槽通过施工水平钻孔接通采空区,进行采空区瓦斯抽采。研究结果表明:在保证工作面足够配风量条件下,大直径水平钻孔瓦斯抽采浓度3.2%~10.2%,抽采量5.4~23.6 m^(3)/min,工作面上隅角瓦斯浓度不超过0.58%,回风巷瓦斯浓度不超过0.49%。确保了工作面安全高效生产。
In order to study the reason for the over-limit gas in the upper corner of the fully mechanized caving face and improve the control effect of the over-limit gas in the upper corner of the working face,the 81505 working face of Baode coal mine was taken as the research object,combined with the mining process parameters of the working face,and the partial Y-type ventilation In this way,the finite element software FLUENT is used to simulate and study the gas flow field distribution characteristics in the goaf of the working face,and on this basis,a large-diameter horizontal borehole gas drainage technology for the gas in the goaf is proposed:that is,pass along the groove on the preparation working face.Construction horizontal drilling is connected to the goaf for gas drainage in the goaf.The research results show that:under the condition of ensuring sufficient air distribution at the working face,the gas drainage concentration of large-diameter horizontal boreholes is 3.2%-10.2%,the drainage volume is5.4-23.6 m~3/min,and the gas concentration in the upper corner of the working face does not exceed0.58%,the gas concentration in the return air lane does not exceed 0.49%.Ensure the safe and efficient production of the working face.
作者
张锋
ZHANG Feng(China Coal Technology and Engineering Group Chongqing Research Institute Co.,Ltd.,Chongqing 400039,China;State Key Laboratory of Gas Disaster Detecting,Preventing and Emergency Controlling,Chongqing 400037,China)
出处
《煤炭技术》
CAS
北大核心
2023年第2期131-134,共4页
Coal Technology
基金
国家“十三五”科技重大专项(2016ZX05067004-004
2016ZX-05043005-003)
中国煤炭科工集团有限公司科技创新创业资金专项项目(2018MS011)。
关键词
采空区瓦斯
数值模拟
上隅角
偏Y型通风
大直径钻孔
goaf gas
numerical simulation
upper corner
partial Y-type ventilation
large-diameter borehole
