我队从1980年起逐步从金属（主要是铁）勘探转入煤田普查施工。几年来由于种种原因，钻探质量差（主要是煤心的采取和品质）、效率低一直是我队钻探生产中存在的主要问题，如1982年，完工钻孔13个优质孔率仅46.2％，台月效率仅286米，纯钻进时间仅27.5％。为了从根本上解决我队生产被动局面，加快煤田勘探速度，从适应四化建设对能源的需要，我队去年在宁东煤田矿区开动一台S75绳索取心试验钻机，探索这一钻进方法应用于煤田钻探施工的可能性。并与 Since 1980, our team gradually shifted from the exploration of metal (mainly iron) to the coalfield census. In recent years, due to various reasons, the drilling quality is poor (mainly the coal heart’s taking and quality), the low efficiency has always been the main problem in our team’s drilling production. For example, in 1982, only 13 drilling holes with high quality porosity of 46.2% Taiwan and the moon is only 286 meters efficient, pure drilling time is only 27.5%. In order to fundamentally solve the passive situation of our team to produce and speed up the exploration of coalfields, in order to meet the energy needs of the four modernizations, our team started a S75 rope coring rig in Ningdong coalfield last year to explore this drilling method Possibility of drilling in coalfield. and with