冲击回转钻进是提高中硬以上岩石钻进效率的一种行之有效的岩心钻探方法.我部在学习铁岭地质大队经验的基础上,与北京工业大学协作,从1972年开始研制液动射流冲击回转钻具,经过广大指战员的努力,随着生产发展的需要,研制工作已经由直径110毫米的冲击器,发展到目前生产施工中使用的以JSC-75型液动射流冲击器为主的冲击回转钻具.七年来,使用以JSC-75型为主的液动射流冲击回转钻具(最多开动八台钻机)钻进各种岩石,总进尺28564米,完工钻孔139个,钻进最深孔440.46米,取得了较好的经济技术效果.由于我们技术水平所限,又缺乏必要的 Impact rotary drilling is an effective core drilling method to improve the drilling efficiency of moderately hard rock.Our department, in collaboration with Beijing University of Technology, based on the experience of Tieling Geological Brigade, started to develop the liquid jet Impact rotary drilling tools, after the officers and men’s efforts, with the development of production needs, research and development work has been the diameter of 110 mm from the impactor, the development of the current production and use of the JSC-75-based hydraulic jet impactor based Impact rotary drilling rig. In the past seven years, a variety of rocks were drilled using liquid jets impact rotary drilling tools (up to eight rigs), with a total footage of 28,564 meters, 139 completed drills and drilling The deepest hole 440.46 meters, and achieved good economic and technological results due to our limited technical level, but also the lack of necessary