水文地质工程地质2025，Vol.52Issue(5)：43-54,12.DOI:10.16030/j.cnki.issn.1000-3665.202506031
宁武闭坑煤矿老窑水硫酸盐污染修复时空分数阶数值模拟
Spatiotemporal fractional numerical simulation of sulfate contamination remediation in goaf water from the abandoned Ningwu coal mine
摘要
Abstract
In response to the problem of sulfate contamination in the goaf water of the abandoned Ningwu coal mine,this study investigated the impact of different treatment measures on the migration and diffusion of pollutants,providing a scientific basis for groundwater remediation in the mining area.Based on infiltration theory,a two-dimensional heterogeneous water flow and solute transport model was developed.A fractional order parameter optimization inversion method was employed to simultaneously invert spatial and temporal fractional derivative orders related to dispersion and porosity.The model was used to simulate the migration trend of sulfates in the next 20 years under five governance scenarios.Scenario 1 represents the baseline case,simulating the natural diffusion process of goaf water under the current situation without governance.Scenario 2 involves reducing precipitation infiltration through surface and fault anti-seepage engineering.Scenario 3 adopts the upstream vertical grouting anti-seepage wall scheme to block the impact of the goaf water on the surrounding groundwater environment.Scenario 4 implements in-situ pretreatment technology to reduce the concentration of pollutants in the goaf water.Scenario 5 represents a comprehensive strategy,and systematically analyzes its synergistic optimization effect through the implementation of anti-seepage engineering,vertical anti-seepage wall construction,and pollutant concentration control measures.Compared to natural governance scenarios,all four governance schemes showed varying degrees of restoration effects.The comprehensive governance scheme performed the best;in situ pretreatment and vertical anti-seepage walls are secondary,while the effectiveness of simply reducing precipitation infiltration is relatively limited.It was found that the comprehensive strategy can effectively control sulfate contamination through the synergistic mechanism of"source control process blockage end treatment".This study provides a scientific comparison basis for the treatment of water pollution in the goaf of the closed pit coal mine in Ningwu County.It is recommended to prioritize the comprehensive treatment mode in practical engineering and establish a long-term monitoring evaluation optimization dynamic management system.关键词
老窑水/数值模拟/硫酸盐污染/闭坑煤矿/参数反演Key words
goaf water/numerical simulation/sulfate contamination/abandoned coal mine/parameter inversion分类
天文与地球科学引用本文复制引用
代锋刚,王崇尧,魏爱华,张发旺,刘煜..宁武闭坑煤矿老窑水硫酸盐污染修复时空分数阶数值模拟[J].水文地质工程地质,2025,52(5):43-54,12.基金项目
国家自然科学基金重点项目(42430718) （42430718）
国家重点研发计划项目(2023YFC3710001) （2023YFC3710001）
河北省省级科技计划项目(22373601D,E2021403001) （22373601D,E2021403001）
河北省水资源可持续利用与产业结构优化协同创新中心开放基金项目(XTZX202112) （XTZX202112）
河北省地质资源环境监测与保护重点实验室开放基金项目(JCYKT202002) （JCYKT202002）
