采空区上覆岩层透水治理实例研究

Case Study of Water Permeable Control in Overlying Strata in Goaf

煤层开采后受构造及裂隙带影响,上覆砂岩含水层在采空区出现大面积滞后出水,出水通道具有多样性、复杂性和范围大等特点,地面直钻孔注浆堵水效果不佳。本文在地质条件探查分析的基础上,施工定向水平主孔和多个水平分支钻孔,采用地面定向钻进及注浆技术,在煤层顶板裂隙带中形成隔水层,取得了良好的注浆堵水效果。

The coal seam is affected by the structure and fracture zone after the coal seam is mined,the overlying sandstone aquifers have large area lagging water in the goaf,and the water outlet channel has the characteristics of diversity,complexity and wide range,and the effect of water plugging is not good.On the basis of exploration and analysis of geological conditions,the directional horizontal main hole and multiple horizontal branch boreholes are constructed,and the ground directional drilling and grouting technology are adopted to form the aquifers in the fracture zone of the coal seam roof,and good grouting effect has been obtained.