银山铅锌矿是一个有四十多年地下开采历史的矿山。在80年代以前,矿山采用有底柱浅孔留矿法,80年代矿山开始采用无底柱浅孔留矿法。采空区除部分进行废石充填外,其余均自然崩落,致使局部地压活动加大,造成部分矿体回采难。据统计,到1998年底,银山矿-150ｍ中段以上残留难采矿体总 Yinshan lead-zinc mine is a mine with more than 40 years of underground mining history. Before the 1980s, the mine used a shallow pillar with a shallow pillar retention method, and in the 1980s the mine started to adopt a shallow pillarless pillar retention method. In addition to the part of the goaf waste rock filling, the rest are natural collapse, resulting in increased local pressure activities, resulting in some ore mining difficult. According to statistics, by the end of 1998, the total residual refractory mining body above the mid-150m of the Yinshan Mine had been total