个旧锡矿高松矿田水文地质调查

个旧锡矿高松矿田区是我国主要锡产区之一,随着开采标高下降,矿区地下水越来越复杂。本次调查通过剖面调查、岩石样品和钻孔岩芯分析、地下水环境调查等研究,从岩溶发育规律、天然水文地质、开采水文地质等方面进行了分析,结果表明：1)高松矿田地下水可划分为两个边界条件清晰的独立水文地质单元,以大气降雨补给为主,集中以暗河或直接向溪沟泄流。2)矿坑潜在充水水源主要有大气降水及个旧组含水层,其中矿坑与顶部岩溶洼地有直接水力联系,遇强降雨易发生透水危害。3)个旧组含水层在未来开采水平依然发育有溶洞,矿坑开采很容易直接揭露岩溶水,引发突水危害。

Hydrogeological Iinvestigation in Gaosong fField of Gejiu tTin mMine

Gaosong field of Gejiu tin mine is one of the main tin producing mines in China. With the exploitation going deep, the groundwater becomes more and more complicated. This investigation analyzed the karst development law and (natural and mining) hydrogeology though section survey, rock sample and bore core analysis, and groundwater survey. The results show that: 1) Groundwater in Gaosong field can be divided into twoindependent hydrogeological units with clear boundary conditions. Every hydrogeological unit is mainly atmospheric rainfall supply and directly excretes to creeks and underground rivers. 2) The potential pit water source is mainly composed of atmospheric precipitation and Gejiu group aquifer. The mining pits have direct hydraulic connection with the top karst depression and maybe endangered by strong precipitation. 3) Gejiu group aquifer will still develop karst caves in future mining. The mining pits can easily uncover karst water directly and cause water inrush accidents.