论文部分内容阅读
祁东矿924工作面上覆8224采空区,随着工作面的回采,上下采空区贯通加剧了采空区的遗煤氧化。在924工作面回采时发现上覆8224采空区存在高温危险区域,为了消除采空区安全隐患,对924工作面近距离煤层上下采空区自燃危险性进行分析。通过采取上下封堵漏风通道、注氮惰化上下采空区和定点灌注三相泡沫消除高温点等综合防灭火技术措施,在924工作面回采过程中,924工作面上隅角未出现CO超限现象,上覆8224采空区气体指标保持正常状态,保障了924工作面的安全回采。
The 924 face of Qidong Mine is covered with 8224 goafs. With the mining of the working face, the goaf up and down the goaf exacerbated the coal residue oxidation in the goaf. In the mining face of 924 working face, it is found that there is high temperature danger zone in overlying 8224 gob area. In order to eliminate the potential safety hazard in goaf, the spontaneous combustion risk of upper and lower gob areas near 924 working face is analyzed. By taking the upper and lower plug air leakage channels, nitrogen injection inerting goaf and down goaf and fixed-point perfusion three-phase foam to eliminate high temperature point comprehensive fire prevention and control measures, 924 face mining process, 924 face corner does not appear CO Limit phenomenon, the overlying 8224 gob gas indicators to maintain normal conditions, to protect the safe mining 924 face.