1978年我队在集安高台沟石膏矿区钻探施工过程中,孔深320米时,由于下钻时钻杆丝扣没上紧,造成中途回扣跑管,加上孔内不清洁,致使粗径钻具被埋。处理这一事故时采用拉、打、顶都没起效果,最后决定反出钻杆后扩孔。反钻杆过程中,由于孔深,钻孔弯曲,反劲很大,以致先后出了两起严重的人身事故。在这种情 In 1978, our team set up the Gaotougou gypsum mine in the construction process of drilling, hole depth of 320 meters, due to drill pipe screwed when not tight, resulting in half-way rebate pipe, together with the hole is not clean, resulting in large diameter Drilling tools are buried. When dealing with the accident, pulling, striking and toping did not work, and finally the counterbored drill hole was reamed. In the process of reverse drilling, due to the deep hole, the drill hole is bent and the force of anti-drill is so great that two serious personal accidents have occurred one after another. In this situation