摘要
云南北衙金矿属于典型的岩溶充水矿床,水文地质条件复杂。矿床主要充水水源为大气降水、北衙组岩溶含水层地下水,其次为更新统灰质角砾岩岩溶含水层地下水。采用地下水动力学"大井法"和"水文地质比拟法"进行了露采矿坑涌水量预测,1540m中段旱季平均涌水量8569m~3/d,雨季平均涌水量16745m~3/d;1429m中段旱季平均涌水量25219m~3/d,雨季平均涌水量28650m~3/d,为矿山生产建设及矿坑排水设计提供可靠依据。
Beiya Au deposit,Yunnan is a typical karst water filling deposit,with the complicated hydrogeological conditions.The main water filling source of the deposit is the air precipitation,the underground water of karst aquifer of Beiya Formation,secondarily Pleistocene underground water of karst aquifer of calcic breccia.We have carried out the welling prognosis of opencast pit with the underground water "large well method" and " hydrogeological analogue method" of underground water dynamics.To the level 1540 m,the dry season average welling 8569 m~3/d,rainy season average welling 16745 m~3/d;level 1429 m,dry season average welling 25219 m~3/d,rainy season average welling 28650 m~3/d,which can provide the reliable basis for the mine production and pit drainage.
引文
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