煤田地质与勘探2025，Vol.53Issue(7)：27-36,10.DOI:10.12363/issn.1001-1986.25.01.0078
侏罗纪煤田砂岩地下水微量元素迁移特征
Trace element migration in groundwater in sandstone aquifers in the Jurassic coalfields:A case study of the Guojiahe Coal Mine
摘要
Abstract
[Background]The Ordos Basin,a vital energy hub in China,contains considerable coal reserves.However,the environmental issues arising from coal mining warrant attention,especially given the fragile ecosystems of the Juras-sic coalfields.[Methods]This study investigated the Guojiahe Coal Mine in Shaanxi Province.Based on measured con-centrations of 31 trace elements dissolved in sandstone aquifers across varying geological ages,this study conducted a comparative analysis of the evolutionary characteristics of these trace elements between unmined reducing and post-min-ing oxidizing conditions using numerical simulations.Accordingly,it revealed the impacts of coal seam mining on trace element migration in groundwater in sandstone aquifers within the study area.[Results and Conclusions]The results in-dicate that the trace elements are unevenly distributed in the vertical direction,with significant differences in their con-centrations observed between coal-bearing strata and their overlying strata.The behavior of specific elements is associ-ated with the variation in groundwater flow(Q),as indicated by positive and negative correlations between C(the con-centration of a trace element)and Q.Based on these findings,this study developed the geochemical models of As,Se,Cr,Fe,and heavy metal elements,elucidating the dissolution behavior of trace elements and its controlling mechanisms under the influence of coal mining.The dissolution of trace elements is found to be primarily governed by adsorption and the dissolution of oxide minerals.About 8.11×10-8 Gmol of trace elements that are closely related to the environ-ment are transported into groundwater every month,with the concentrations of several elements exceeding relevant standards.Among these,Fe,Mn,Al,Cu,and Zn originate primarily from coal-bearing strata,while V,Cr,and Co are predominantly derived from the Cretaceous sandstone strata.Therefore,there is an urgent need to strengthen environ-mental protection and management around the Jurassic coalfields in the Ordos Basin.关键词
鄂尔多斯盆地/煤层开采/砂岩地下水/溶解微量元素/微量元素污染/迁移规律/生态环境影响Key words
Ordos Basin/coal mining/groundwater in a sandstone aquifer/dissolved trace element/trace element con-tamination/migration pattern/ecological-environmental impact分类
资源环境引用本文复制引用
施龙青,曲兴玥,程皓..侏罗纪煤田砂岩地下水微量元素迁移特征[J].煤田地质与勘探,2025,53(7):27-36,10.基金项目
青岛市自然科学基金项目(25-1-1-47-zyyd-jch) （25-1-1-47-zyyd-jch）
山东科技大学思想政治教育研究课题 （）
