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凡口矿资源丰富,除铅锌金属外,还有硫、锗、银等。国家要求损失率不大于5％,贫化率不大于10％。但由于矿体形态复杂多变,且上部为含水层所覆盖,水文地质条件复杂,所以设计采用充填法,矿房为胶结充填,间柱为水砂充填。条件好可采用留矿法。原设计充填法和留矿法各占50％,采场生产能力留矿法为120(吨/日),充填法为80(吨/日),平均100(吨/日)。但是历年来采场生产能力充填法最好只有67(吨/日),一般为40～60(吨/日);留
Where mine mouth is rich in resources, in addition to lead-zinc metal, there are sulfur, germanium, silver and so on. The state requires a loss rate of not more than 5% and a dilution rate of not more than 10%. However, due to the complex and changeable ore body morphology, and the upper part is covered by aquifer, the hydrogeological conditions are complex. Therefore, the filling method is adopted in the design, and the cement house is cemented and filled with water sand. Good conditions can be retained method. 50% of the original design filling method and retention method, stope production capacity retention method 120 (t / day), filling method 80 (t / day), an average of 100 (tons / day). However, over the years, the best method for filling the production capacity of stopes is only 67 (tons / day), usually 40-60 (tons / day).