大吉山钨矿从1958年投产十几年以来,在井下采矿工作中,大量采用浅眼留矿法开采急倾斜矿脉。根据历年的统计资料,浅眼留矿法的采矿量,平均占年采矿量的50%以上,最高的达84.3%。全矿每年投入生产的浅眼留矿法采场一般有60～100个,每年结束的采场平均在50个以上。应用浅眼留矿法的类型有:矿岩底柱留 Since Dajishan tungsten mine was put into operation in 1958 for more than a decade, in the underground mining work, a large number of shallow-hole retention methods have been adopted to extract the steeply-inclined ore veins. According to the statistics over the years, the mining amount of shallow-hole retention mining method accounts for over 50% of the annual mining volume and the highest amount of 84.3%. Every year, all the mine's shallow-shelf mining method put into production generally has 60 to 100 stopes, and the stope at the end of each year is on average more than 50. The type of shallow ore retention method is: the bottom of the ore rock stay