一、连续钻割工艺的研究钻孔水力割缝措施是提高低透气煤层瓦斯抽放率的一种有效途径。从1970年以来,先后在鹤壁六矿、四矿等水采矿井进行过大量试验并取得了较好效果〔1〕。但那时的钻割工艺流程是借用红旗150型钻机进行的,打钻与割缝是一个不连续工艺过程,而是分开 A continuous drilling cutting process Drilling hydraulic cutting measures is to improve the low permeability coal gas drainage rate of an effective way. Since 1970, a large number of experiments have been carried out successively in Hebi No.6 and No.4 coal water mining wells and achieved good results [1]. But then the drilling process is to borrow the red flag 150 drilling rig, drilling and kerf is a discontinuous process, but separate