复采工作面煤自燃危险区域划分及综合治理技术研究

Classification and comprehensive management technology of coal spontaneous combustion hazardous areas in the remining face

针对运河煤矿F1301复采工作面煤自然发火事故,基于F1301工作面开采的实际情况,对工作面自然发火隐患进行分析,根据进回风巷钻孔的气样数据将工作面巷道两侧采空区煤自燃的危险程度分为高风险、一般风险和低风险三个级别,对此提出防灭火监测监控系统及综合治理技术,并在实际工程中得到应用,应用结果表明,各观测钻孔内CO浓度整体呈现波动下降趋势,最终稳定在0.024‰以下,有效抑制了采空区内遗煤的氧化进程,消除了F1301工作面开采过程中邻近1301、1302采空区的煤自燃隐患,有利于保障F1301工作面后续的顺利回采。

In response to the coal spontaneous combustion accident in the F1301 remining face of Yunhe Coal Mine,based on the actual situation of F1301 mining face,the hidden dangers of coal spontaneous combustion in the working face were analyzed.Based on the gas sample data from the intake and return air way drilling,the risk level of coal spontaneous combustion in the goaf on both sides of the working face roadway is divided into three levels:high risk,general risk,and low risk,a fire prevention and monitoring system and comprehensive treatment technology were proposed and applied in practical engineering.The application results show that,the overall CO concentration in each observation borehole shows a fluctuating and decreasing trend,ultimately stabilizing below 0.024‰.This effectively suppresses the oxidation process of residual coal in the goaf,eliminates the hidden danger of coal spontaneous combustion in the adjacent 1301 and 1302 goafs during the mining process of F1301 working face,and is conducive to ensuring the smooth subsequent mining of F1301 working face.