１９９７年，我们在土屋铜矿普查，ＺＫ２５０３号孔孔深１５３ｍ处发生跑钻事故。由于绳索取心钻杆已使用多年，已到报废年限，致使钻杆断成多节，又因是水敏性地层及软硬互层、破碎，最后２个立根返不出来，被迫报废。１９９８年，我们又重新在距原孔２ｍ处钻孔，在孔深... In 1997, we encountered a run-in accident at the Tsukuk copper mine census, hole No. 153 of ZK2503. As the cord coring drill pipe has been used for many years, has reached the end of life, resulting in drill pipe broken into sections, but also because of water-sensitive strata and hard and soft layer, broken, the last two roots back, was forced to scrap. In 1998, we again drilled 2m away from the original hole, deep in the hole ...