野青工作面堵水治理技术研究及应用

Research and application of water plugging control technology in Yeqing working face

九龙矿15449S工作面回采期间顶板频繁来压,受矿压、水压以及上部15249S工作面采动及区域地震作用影响,采空区涌水量逐渐增大。针对这一情况,通过对工作面周边水文地质条件的综合分析,利用水平定向技术对工作面底板薄弱带进行探查,注浆封堵出水点。实践应用后,水平分支孔成“网格”式交叉施工,成功将涌水量减至1.5 m^(3)/min,保证了上覆15249S工作面的安全回采,起到了保水开采和减少矿井排水费用的作用,同时提出的野青工作面综合防治水技术对策,为深部煤层安全开采奠定了基础。

During the mining period of No.15449S Face in Jiulong Mine,the roof was frequently pressed.Affected by mine pressure,water pressure,mining and regional seismic action of the upper No.15249S Face,the water inflow in the goaf gradually increased.In view of this situation,through the comprehensive analysis of the hydrogeological conditions around the working face,the horizontal orientation technology was used to explore the weak zone of the working face floor,and the water outlet point was blocked by grouting.After the practical application,the horizontal branch hole was cross-constructed into a‘grid'type,and the water inflow was successfully reduced to 1.5 m^(3)/min,which ensured the safe mining of the overlying No.15249S Face,and played a role in water-preserved mining and reducing the cost of mine drainage.At the same time,the comprehensive water prevention and control technical countermeasures of Yeqing working face were put forward,which laid a foundation for the safe mining of deep coal seams.