极薄煤层群顶板穿层钻孔瓦斯抽采技术研究
郭军杰,程晓阳,刘益文
Research on roof-cross borehole gas drainage method in ultra thin coal seam group
煤炭工程 . 2017, (2): 72 -74 .  DOI: 10.11799/ce201702023