摘要
针对沿空留巷W型通风条件下采空区漏风规律以及自燃“三带”不明确的现状,以寨崖底矿3912工作面为工程背景,采用FLUENT软件模拟出采空区漏风规律和自燃“三带”分布,结果表明:沿工作面方向,存在0~30 m和160~175 m这2个采空区漏风最严重区域;工作面采空区主进风巷侧最大氧化带宽度54 m,沿空留巷侧最大氧化带宽度221 m;采空区沿空留巷侧氧浓度不会随着工作面的推进而进入窒息带;采空区沿空留巷侧出现“条状带”氧化带。并通过矿井现场监测,得到寨崖底矿3912工作面采空区自燃“三带”分布。结合2种方法的结果对比分析,表明吻合度较高。研究成果可为防范相似通风和开采条件下的工作面采空区煤自燃提供参考。
Aiming at the current situation of wind leakage in the goaf area under the W-type ventilation conditions along the empty lane and the unclear status quo of the spontaneous combustion"three belts",using the working surface of the 3912 working surface of the Zhaiyadi mine as the engineering background,the FLUENT software was used to simulate the law of air leakage and the spontaneous combustion"three belts"division in the goaf area,and the results showed that along the working surface,there were two areas with the most serious wind leakage in the goaf area:0-30 m and 160-175 m;the maximum oxidation band width of the main inlet lane side of the working surface goaf is 54 m,and the maximum oxidation band width along the side of the empty lane is 221 m;the oxygen concentration along the side of the empty lane in the goaf will not enter the asphyxiation zone with the advancement of the working surface;a"strip belt"oxidation zone appears along the side of the empty lane in the goaf.And through the mine site monitoring,the distribution of spontaneous combustion in the goaf area of the 3912 working surface of the Zhaiyadi mine was obtained.The comparative analysis of the results of the two methods showed that the degree of coincidence was high.The research results can provide a reference for preventing spontaneous combustion of coal in the working surface goaf under similar ventilation and mining conditions.
作者
侯家琛
张兴华
郭明超
李金洛
郭歌
HOU Jiachen;ZHANG Xinghua;GUO Mingchao;LI Jinluo;GUO Ge(College of Safety and Emergency Management Engineering,Taiyuan University of Technology,Taiyuan 030000,China)
出处
《煤炭技术》
CAS
北大核心
2023年第8期162-166,共5页
Coal Technology
基金
山西省揭榜招标项目(20201101005)。
关键词
W型通风
沿空留巷
数值模拟
漏风规律
“三带”划分
W-type ventilation
along empty lanes
numerical simulation
law of air leakage
"three belts"division
