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黄沙坪铅锌矿是个品位较高的矿床。矿体个数多且分散,产状复杂,顶底板不规整,分支复合现象普遍,部分矿体成群状产出。因此,选择采矿方法,要特别注意经济效果,尽量减少损失与贫化。以往多选用水平分层干式充填采矿法进行回采,从1976年投产以来,积存的矿柱矿量达50多万吨。因此回采矿柱,就成了生产技术上一个重要课题。为了便于回收矿柱,回采矿房时,已在充填料和间柱之间筑了一道厚0.3～0.4米的混凝土隔墙,采场第一分层底板也铺了一层厚0.3～0.4米的钢筋混凝土底板。从1974年开始试用水平分层干式充填法
Huangshaping lead-zinc mine is a high grade deposit. The number of ore bodies and scattered, complex shape, top and bottom irregular, complex branching phenomenon, some ore body output in groups. Therefore, the choice of mining methods, pay special attention to economic results, minimize losses and depletion. In the past, many horizontal dry-filling mining methods were adopted for mining. Since it was put into operation in 1976, the accumulated pillars have reached over 500,000 tons. Therefore, mining pillars, it has become an important issue of production technology. In order to facilitate the recovery of ore pillars, when mining the mining house, a concrete slab of 0.3 to 0.4 meters thick has been built between the filling material and the columns, and the first layered floor of the stope is also paved with a layer of 0.3 to 0.4 meters Reinforced concrete floor. Trial level since 1974, the level of dry filling method