黄陵一号煤矿814工作面防治水技术

Water prevention and control technology for 814 working face of Huangling No.1 Coal Mine

随着煤矿开采深度不断增加,井下水文地质情况也越发复杂多变,矿井水害防治措施不到位往往会造成水害。以黄陵矿业一号煤矿814回采工作面为例,分析了该矿水害治理情况。黄陵一号煤矿814工作面水害主要为上覆延安组及直罗组下段砂岩裂隙水,为减小上覆含水层威胁,实施了井下物探探查,圈定了3处富水异常区,开展了井下探放水工程,钻探进尺5900 m,总计疏放水量1.50×10^(5)m^(3)。经持续观测,该工作面顶板疏放水钻孔动态涌水量持续稳定衰减,最终钻孔涌水量稳定在0~10 m^(3)/h,水压为0~2 kPa,有效减小了顶板直罗组砂岩裂隙水的水害威胁。814工作面水害治理已取得较为良好的效果,为煤矿防治水工作提出指导性意见。

With the increasing depth of coal mining,the underground hydrogeological conditions are becoming more complex,and the inadequate prevention and control measures of mine water disasters would cause water disasters.Taking the 814 mining face of Huangling No.1 Coal Mine as an example,this paper analyzes the water disaster control situation of the mine.The water disaster of 814 working face in the mine is mainly the sandstone fissure water in the overlying Yan’an Formation and the lower section of Zhiluo Formation.In order to reduce the threat of the overlying aquifer,the underground geophysical exploration was carried out,three water-rich abnormal areas were delineated,and the underground water exploration and drainage project was carried out.The drilling footage was 5900 m,and the total amount of water drainage was 1.5×10^(5)m^(3).After continuous observation,the dynamic water inflow of the roof drainage borehole in the working face continues to decay steadily.Finally,the water inflow of the borehole is stable at 0~10 m^(3)/h,and the water pressure is 0~2 kPa,which effectively reduces the water hazard threat of the sandstone fissure water in the Zhiluo Formation of the roof.The water disaster control of 814 working face has achieved good results,which provides guidance for coal mine water prevention and control work.