卢丹美,和洪秋,赵志成,黄泽霖,单慧媚,何乐,文振兴,江竞羽.盘龙铅锌矿区地下水数值模拟与矿坑涌水量预测[J].矿产勘查,2024,15(12):2389-2399 |
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 |
投稿时间:2022-03-27 |
DOI:10.20008/j.kckc.202412022 |
中文关键词: 铅锌矿 地下水数值模拟 涌水量预测 |
英文关键词: lead-zinc mining numerical simulation of groundwater water inflow prediction |
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中文摘要: |
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 m3/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 m3/d和 23075 m3/d。模拟成果为矿山安全开采提供了理论依据。 |
英文摘要: |
In the process of mineral mining, the phenomenon of pit bursts and water inrushes is becomingmore and more frequent, which has seriously affected the environment and production safety of the mining area. Inthis 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 ofthe GMS groundwater simulation software is used to analyze and predict the changes of groundwater seepage fieldunder 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 m3/d, and the water level drops in the center of thefunnel to the depth and direction of the Qianjiang Riverbed. This is probably because with the increase of miningdepth, karst becomes from development to non-development, and the permeability of the medium weakens, whichlimits the increase of inflow water. Under the mining depth of -380 m at present and -500 m in the future, the simu.lated inflow water is 20891 m3/d and 23075 m3/d, respectively. It is worth noticing that about 50% of the inrush wa. ter is mainly concentrated in the -70 m range. |
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