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由勘探技术研究所研究设计的S 75 C型绳索取心冲击回转钻具于1985年5—7月在湖北省大冶县陈子山矿区进行了生产试验，获得成功。本文拟从陈子山矿区的检验情况对其钻进工艺的若干问题进行探讨。
The S 75 C-type cord coring impact drill developed and designed by the Institute of Prospecting Technology was successfully tested in the Chen Zishan mining area in Daye County, Hubei Province in May-July 1985. This paper intends to explore some of its drilling technology from the inspection of the Chen Zishan mining area.