酸性矿井水对地下水污染规律的数值模拟研究  

Simulation Analysis for Acid Mine Drainage Transport in Groundwater

作　　者：齐建军[1] 王岩[2] 张兴华[2] 胡晓吉[2] 

机构地区：[1]同煤集团轩岗煤电公司焦家寨煤矿,山西原平034115 [2]煤炭科学研究总院抚顺分院,辽宁抚顺110011

出　　处：《湖南科技大学学报（自然科学版）》2008年第3期123-128,共6页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家自然科学基金资助项目(50574048)

摘　　要：以溶质运移理论为基础,分析了酸性矿井水在含水层中运移的规律,充分考虑了地下水密度变化对浓度分布的影响,在综合考虑对流扩散、吸附解吸、生物降解条件下建立了酸性矿井水在地下水中运移的耦合动力学数学模型,采用Galerkin有限元方法和Picard迭代法相结合对耦合模型进行了离散,通过室内土柱实验求得了基本参数并对地下水污染的动态过程进行了仿真模拟,预测了污染浓度的时空分布特征,并结合实际观测数据进行对比分析.结果表明:污染面积随时间推移不断扩大,且纵向扩散显著;不同组分由于各自特征的巨大差异,污染程度也有很大差别.此研究对预测预报酸性矿井水迁移归宿、评价环境质量、资源化利用以及环境污染的治理与控制等具有一定参考价值.图9,表1,参5.On the basis of solute transport theory, the mechanism of acid mine drainage in the aquifer was analyzed. The effect on concentration contribution was considered duing to variable density groundwater flow. A coupled numerical model was developed with convection,sorption and dissolve,disintegration for simulating the acid mine drainage transport in groundwater. The model was discreted by using a Gelarkin finite-element method and a Picard iteration scheme, the basic parameters were getted by the Soil pillar experiment that was doen indoor and the process of acid mine drainage was presented, which predict the temporal and spatial distribution features of contaminant concentration. The result indicates that the contaminated plume is continually extended as time increases, and the vertical diffusion is more abvious, The concentration distribution of contaminant is subtle to variation of fluid transport, and fluid density have various effect on different solutes, becauce their character are different from each other. The research are valuable to predict the transport and transformation law of acid mine drainage, evaluate environmental quality, resources and control environmental pollution.

关 键 词：酸性矿井水 地下水 数值模拟 有限元法 

分 类 号：X131.2[环境科学与工程—环境科学]