陕西煤炭2025，Vol.44Issue(6)：21-27,7.DOI:10.20120/j.cnki.issn.1671-749x.2025.0604
采空区流场三维演化规律与自燃危险区域判定研究
Three-dimensional evolution law of goaf flow field and determination of spontaneous combustion hazard zone
张孝金 1孙汤凯 1高志新 1田波 1张臣 1李建鹏1
作者信息
- 1. 呼图壁县东沟煤炭有限责任公司,新疆昌吉 831216
- 折叠
摘要
Abstract
In order to study the evolution law and distribution range of the"three zones"of coal spontaneous combustion in goaf,the 1402 fully mechanized mining face of Donggou Coal Mine was taken as the research object.The indicator gas types of coal seam spontaneous combustion were determined through programmed temperature experiments,and the"three zones"of spontaneous combustion before and after nitrogen injection in the goaf of 1402 fully mechanized mining face were deter-mined through numerical simulation and on-site observation.The results show that CO,C2H4,and C2H4/C3H8 can be used as indicator gases for spontaneous combustion in Kuangou Coal Mine.The range of the"three zones"of spontaneous com-bustion after nitrogen injection is determined as follows:the inlet side belongs to the heat dissipation zone in the goaf area 15.4 m away from the working face,and the return side belongs to the heat dissipation zone 18.6 m away from the working face.The intake side belongs to the oxidation zone within the goaf area 15.4～53.6 m away from the working face,and the return side belongs to the oxidation zone 18.6～66.4 m away from the working face;After the intake side of the goaf reaches 53.6 m and the return side reaches 66.4 m,it enters the suffocation zone,compared to the range of the"three zones"of spontaneous combustion before nitrogen injection.Nitrogen injection significantly reduces the width and area of the oxidation zone,resulting in a 21.8 m reduction in the width of the oxidation zone on the inlet side compared to before nitrogen injec-tion,effectively reducing the difficulty of controlling the risk of spontaneous combustion in goaf.关键词
煤自燃/注氮/指标气体/自燃"三带"Key words
coal spontaneous combustion/nitrogen injection/indicator gas/spontaneous combustion"three zones"分类
矿山工程引用本文复制引用
张孝金,孙汤凯,高志新,田波,张臣,李建鹏..采空区流场三维演化规律与自燃危险区域判定研究[J].陕西煤炭,2025,44(6):21-27,7.
