盘龙铅锌矿区地下水数值模拟与矿坑涌水量预测  

Numerical simulation of groundwater and prediction of mine inflow in Panlong lead-zinc mining area

作　　者：卢丹美 和洪秋 赵志成 黄泽霖 单慧媚 何乐 文振兴 江竞羽 LU Danmei;HE Hongqiu;ZHAO Zhicheng;HUANG Zellin;SHAN Huimei;HE Le;WEN Zhenxing;JIANG Jingyu(Guangxi Institute of Hydrogeology and Engineering Geology,Liuzhou 545000,Guangxi,China;Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology,Guilin University of Technology,Guilin 541004,Guangxi,China;Collaborative Innovation Center of Water Pollution Control and Water Security in Karst Area,Guilin University of Technology,Guilin 541004,Guangxi,China)

机构地区：[1]广西水文地质工程地质勘察院,广西柳州545000 [2]桂林理工大学广西环境污染控制理论与技术重点实验室,广西桂林541004 [3]桂林理工大学岩溶地区水污染控制与用水安全保障协同创新中心,广西桂林541004

出　　处：《矿产勘查》2024年第12期2389-2399,共11页Mineral Exploration

基　　金：国家自然科学基金项目(42167026)、广西自然科学基金(2022GXNSFBA035600);广西矿山水文地质勘查评价关键技术研究人才小高地建设项目(桂地矿办[2023]55号)联合资助。

摘　　要：本文以盘龙铅锌矿区为例,为准确预测矿山设计阶段及实际开采阶段矿坑涌水量,以保证矿山安全开采和保护地下水资源,在分析矿区地质及水文地质条件的基础上,建立了研究区地下水数学模型,应用GMS地下水模拟软件Modflow模块分析并预测不同深度开采条件下的地下水渗流场变化情况。结果表明:矿坑涌水主要来自-70 m工作面,占比达50%。继续往下开采从-120 m增加至-170 m处时,矿坑涌水量增加735 m^(3)/d,且水位降落漏斗中心向深处及黔江河床方向移动。分析原因为随着矿山开采深度的增加,岩溶由发育减弱至不发育,介质渗透性减弱,使得涌水量增加有限。现状开采深度-380 m和未来开采深度-500 m条件下,预测涌水量分别为20891 m^(3)/d和23075 m^(3)/d。模拟成果为矿山安全开采提供了理论依据。In the process of mineral mining,the phenomenon of pit bursts and water inrushes is becoming more and more frequent,which has seriously affected the environment and production safety of the mining area.In this study,the Panlong lead and zinc mining area is selected as an example to establish a mathematical model.Based on the analysis of the geological and hydrogeological conditions in the mining area,the Modflow module of the GMS groundwater simulation software is used to analyze and predict the changes of groundwater seepage field under different depth mining conditions.The results show that when the mining depth increases from-120 m to-170 m,the amount of water inflow in the pit increases by 735 m^(3)/d,and the water level drops in the center of the funnel to the depth and direction of the Qianjiang Riverbed.This is probably because with the increase of mining depth,karst becomes from development to non-development,and the permeability of the medium weakens,which limits the increase of inflow water.Under the mining depth of-380 m at present and-500 m in the future,the simulated inflow water is 20891 m^(3)/d and 23075 m^(3)/d,respectively.It is worth noticing that about 50%of the inrush water is mainly concentrated in the-70 m range.

关 键 词：铅锌矿 地下水数值模拟 涌水量预测 

分 类 号：TD742.1[矿业工程—矿井通风与安全]