摘要
煤矿回采工作面采空区漏风对采空瓦斯分布及采空区自燃发火有着重要的影响。本文对U型通风下不同长度工作面的采空区流场进行了数值模拟。回采工作面长度由100 m依次增加10 m至240 m,并且针对每一长度的回采工作面建立了对应的采空区三维物理模型,运用计算流体力学的方法对不同长度回采工作面采空区的流场进行了数值模拟。结果表明,随着工作面长度的增加,采空区进风侧瓦斯爆炸危险区域的宽度变化幅度较小;采空区中部瓦斯爆炸危险区域的宽度随着工作面长度的增加先增大后减小;随着工作面长度的增加,采空区进风侧和采空区中部瓦斯爆炸危险区域的起始位置均出现向采空区深部移动的趋势。
Air leakage from coal mining working face to goaf has important influence on gasdistribution and spontaneous combustion in the goaf.In this paper,numerical simulation was carried out on the flow field in the goaf with U-type ventilation modes and working faces with different length.The length of the working face increased from 100 m to 240 m by degrees of 10 m,for each length of the working face set up the corresponding three-dimensional physical model of the goaf,the method of computational fluid dynamics was applied to carry out the numerical simulation on the flow field in the goaf of working faces with different length.The results showed that with the increase of the working face length the change of the width of the dangerous gas explosion zone in the air intake side is small; the width of the dangerous gas explosion zone in the central part of the goaf increases first and then decreases with the increase of the working face lengths; with the increase of the working face length the staring position of the dangerous gas explosion zone in the air intake side and the central part of the goaf tends to move to the deep of the goaf.
出处
《世界科技研究与发展》
CSCD
2016年第3期522-526,共5页
World Sci-Tech R&D
关键词
采空区
漏风
不同长度工作面
数值模拟
瓦斯爆炸危险区域
goaf
air leakage
working faces with different length
numerical simulation
the dangerous gas explosion zone
