东曲矿24808工作面上覆采空区充水水源与充水系数分析

Analysis of Water Filling Source and Water Filling Coefficient in Overhead Mined Area of Dongqu Mine 24808 Working Face

为保障24808工作面回采作业时不出现突水现象,结合矿井2#煤层及4#煤层的地质条件,进行2#煤层采空区充水水源及充水通道的分析,根据分析结果可知,24808工作面回采前必须进行上覆采空区的疏放水作业,在工作面进行探放水作业时,进行各项参数的监测,结合地质条件进行上覆采空区充水系数的分析。结果表明:24808工作面探放水作业后,上覆2#煤层采空区的充水系数为0.3,满足煤矿防治水细则要求,能够进行24808工作面的回采作业。

In order to ensure that no water inrush phenomenon occurs during the mining operation of the 24808 working face,combined with the geological conditions of the 2#coal seam and 4#coal seam,the analysis of the water source and channel of the 2#coal seam goaf is based on the analysis results.Before the working face is mined,the dredging and drainage operations of the overburden goaf must be carried out.When carrying out the exploration and drainage operation at the working face,various parameters are monitored,and the water fill coefficient of the overburden goaf is analyzed in conjunction with the geological conditions.The results show that the water-filling coefficient of the mined-out area of the 2#coal seam after the 24808 working face is 0.3,which meets the requirements of coal mine water control regulations,and can perform the mining operation at the 24808 working face.