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某滑石矿区56年至61年打了48个勘探钻孔共钻进9240米,由于取心工具不适用和取心技术不完善而矿心质量不能满足地质要求,使全部工程报废,于62年根据滑石矿钻进
A total of 48 exploration drilling holes were drilled in a certain talc mining area from 1986 to 2009 with a total of 9240 meters. Since the coring tools were not suitable and the coring techniques were imperfect and the core quality could not meet the geological requirements, all the works were scrapped. In 62 years According to talc mine drilling