侧向高位钻孔在高瓦斯特厚煤层中的立体层位研究

Study on three-dimensional horizon of lateral high-level borehole in high gas and extra-thick coal seam

侧向高位钻孔是一种在邻近工作面或巷道布置、以抽采工作面采空区瓦斯为目的的抽放钻孔,主要用于上覆岩层为泥岩、受工作面超前应力集中区影响、传统高位钻孔难以成孔的工作面。通过在永陇公司22311工作面进行试验分析,在不同终孔层位使用侧向高位钻孔抽采采空区瓦斯后,确定了抽采效果最优终孔层位,达到了缩短钻孔施工工期,提高工作面抽采率的目的。

Lateral high-level borehole is a kind of drainage borehole arranged in adjacent working face or roadway for the purpose of extracting gas in goaf of working face.It is mainly used in the working face where the overlying strata are mudstone and the traditional high-level drilling is difficult to form holes due to the influence of the advanced stress concentration area of the working face.Through the test and analysis of 22311 working face of Yonglong Company,after using lateral high-level boreholes to extract gas from goaf in different final hole layers,the optimal final hole layer of extraction effect was determined,and the purpose of shortening the drilling construction period and improving the extraction rate of working face was achieved.