河南栾川钼矿,一九八二年以来,与西安冶金建筑学院在该矿试验推广“中深孔挤压爆破留矿法”,已获得较好效果。几年来的实践证明:这种挤压爆破留矿法,与过去采用的“浅孔房柱法”相比,施工方法简单、安全性好,大块产出率降低百分之十二, Henan Luanchuan molybdenum mine, since 1982, and Xi’an Institute of Metallurgical Construction in the mine test to promote “medium-deep hole blasting retention and retention method”, has achieved good results. Practice over the past few years has proved that: This extrusion blasting retention method, compared with the “shallow hole method” used in the past, the construction method is simple and safe, the bulk output rate decreased by 12%