紫金山金铜矿地下开采矿坑涌水水源识别及防治方案

摘要

利用水化学信息识别地下开采矿坑涌水水源具有技术简便、效果理想等特征.以紫金山金铜矿为例,采用水化学分析和人工示踪试验方法综合判定了矿区深部铜矿的矿坑涌水水源.通过研究代表性水样常规水化学分析、微量元素分析、氢氧稳定同位素分析数据,常规组分Piper三线图,常规及微量元素聚类分析结果以及示踪试验验证结果,认为矿坑涌水主要来自硐室围岩富含大气降雨成因的基岩裂隙水,未受到地表水(汀江水)补给的影响.在此基础上,采用水文地质比拟法预测了矿区-150 m中段巷道开拓完毕后的正常涌水量将达到7736 m3/d,最大涌水量将达到11662 m3/d,并提出了"疏干降压为主,预防为辅"的防治水方案,供区内矿坑涌水防治参考.%Undergound mine water inflow identification technique based on hydrochemical informa-tion is characterized by technical simplicity and good identification effects.Taking Zijinshan Au-Cu Mine as the study example,hydrochemical analysis method and manual trace test method are adopted to identify the source of mine water inflow of the deep copper deposit of Zijinshan mining area.Through comprehen-sive analysis of the conventional hydrochemical analysis results,trace element analysis results and hydro-gen and oxygen stable isotope analysis results of typical water samples,Piper three lines chart of conven-tional component and cluster analysis results of conventional and trace elements of the typical water sam-ples,it is show that the mine water inflow is mainly derived from bedrock fissure water caused by atmos-pheric rainfall in the cavern surrounding rock mass,the mine water inflow is not affected by surface water (Tingjiang water)supplies.Based on the above discussion results,based on hydrogeological analogy method,the normal mine water inflow after the drivage of-150 m level roadway is 7 736 m3/d,and the maximum water inflow is 1 1 662 m3/d in the furture,besides that,the water inflow treatment scheme that is mainly for dredging water inflow and lowering water pressure,and secondary for preventing water inflow is proposed,so as to provide some reliable reference for the treatment of mine water inflow.