Study on three-dimensional horizon of lateral high-level borehole in high gas and extra-thick coal seam
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.
lateral high drillinggas extractionhigh gasextra-thick coal seam
国家科技期刊平台
NSTL
万方数据
