南自来山铜钼矿水文地质特征及涌水量预测研究

Study on hydrogeological characteristics and water yield prediction of Nanzilaishan copper molybdenum

南自来山铜钼矿位于安徽省池州市东南部梅街镇,根据矿区内出露的岩层、岩性组合及含水特征,划分四个含水岩组,分别为第四系松散岩类孔隙含水岩组、碳酸盐岩类裂隙岩溶含水岩组、碎屑岩类裂隙含水岩组和岩浆岩类裂隙含水岩组。研究表明,矿体所在的仑山组白云石大理岩裂隙岩溶水为直接充水水源,其上覆的高家边组泥岩、粉砂岩裂隙水为间接充水水源,大气降水为矿坑地下水的主要补给来源。矿坑边界条件概化为东西两侧为隔水边界,南北两侧为进水边界。对矿山未来首采-250m中段涌水量采用两侧隔水边界中间为稳定流潜水完整井的"大井法"估算进行预测,可为矿山设计部门提供提供地质依据。

The Nanzilaishan Copper and Molybdenum Mine is located in Meijie Town,southeast of Chizhou City,Anhui Province. According to the exposed rock formations,lithological combinations and water-bearing characteristics,four water-bearing rock groups are divided into quaternary loose rock pore water Rock group,carbonate-type fissured karst aquifer group,clastic-type fissured aquifer group,and magmatic-type fissure aquifer group. Studies have shown that the karst water of the dolomite marble rocks in the Lunshan Formation of the ore body is a direct source of water,and the overlying mudstone and siltstone fracture water of the Gaojiabian Formation are indirect water sources. Atmospheric precipitation is the main source of groundwater in the pit. Supply source. The boundary conditions of the pit are generalized as the water-proof boundary on the east and west sides and the water-intake boundary on the north and south sides. The prediction of the first-250 m middle water inflow of the mine in the future using the " big well method" to estimate the complete well with a steady flow diving in the middle of the water-tight boundary can provide a geological basis for the mine design department.