在二台子金矿的浅孔留矿采矿法中成功地使用了预裂爆破技术。该技术是沿矿体边界线设计一排较密集的预裂孔 ,预裂孔超前主爆孔起爆 ,从而沿矿体与围岩交界处形成整齐的预裂缝 ,大大地减少了围岩的混入 ,降低了矿石的贫化率指标 ,取得了良好的经济效益。 The pre-splitting blasting technique has been successfully used in the shallow-hole residual ore mining method in Ertaizi gold mine. The technology is to design a row of more dense pre-cracking holes along the ore body boundary line. The pre-cracking hole leads the blasting ahead of the main blasting hole so as to form a neat pre-crack along the boundary between the ore body and the surrounding rock, greatly reducing the mixing of the surrounding rock and reducing The ore depletion rate indicators, and achieved good economic benefits.