中国地质2026，Vol.53Issue(1)：245-264,20.DOI:10.12029/gc20240529002
滇东富源典型煤矿区地下水水化学特征及水质评价
Hydrochemical characteristics and quality assessment of groundwater in typical coal mining areas of Fuyuan,eastern Yunnan
摘要
Abstract
This paper is the result of hydrogeological survey engineering. [Objective]Fuyuan County,in eastern Yunnan,is an important coal producing area in southwest China.Understanding the hydrochemical characteristics,evolution and water quality of groundwater is of great significance for the protection and utilization of water resources in this area.[Methods]This paper takes the typical coal mining area of Fuyuan County in eastern Yunnan as the main object.We systematically collected 97 water samples and analyzed the data using Piper diagram,Gibbs diagram,factor analysis,and ion ratio coefficients to identify the groundwater chemical characteristics and influencing factors in the study area.The groundwater quality was evaluated by the fuzzy comprehensive evaluation method.[Results]The average pH value of the groundwater in the study area is 7.58,which is weakly alkaline.Total hardness(TH)value ranges from 22 to 1192 mg/L,averaging 208.28 mg/L.The value of total dissolved solids(TDS)ranges from 44 to 2322 mg/L,averaging 347.60 mg/L.The cations are mainly Ca2+and Mg2+,and the anions are mainly HCO3-.The hydrochemical types are HCO3-Ca and HCO3-Ca·Mg.The mine water is enriched in Na+and SO42-,and the hydrochemical type is SO4-Ca and HCO3-Na.[Conclusions]The groundwater chemistry composition in the study area is mainly affected by rock weathering leaching,cation exchange,and human activities.Human activities,as the overall driving factor,include specific sources such as domestic sewage,agricultural activities,and mining activities.Ca2+,Mg2+,and HCO3- are mainly derived from the dissolution of carbonate and silicate.Na+and SO42- are mainly influenced by mining activities,with cation exchange and oxidation of sulphides in coal beds as their main ionic sources.K+,Cl- and NO3- are mainly affected by domestic sewage and agricultural activities.APCS-MLR analysis further shows that the groundwater chemistry composition mainly includes five sources:sulfuric-acid-involved dissolution of carbonate rocks,dissolution of silicate rocks and cation exchange,domestic sewage,agricultural activities,and unknown sources,and their contribution rates to groundwater are 35.01%,19.39%,11.97%,22.47%,and 11.17%,respectively.It indicates that human activities are the main driving factors of the groundwater chemistry in the study area.In conclusion,the regional groundwater quality is generally good,with Grades Ⅳ and Ⅴ groundwater mainly distributed in clastic rock areas with frequent mining activities.The groundwater quality is affected by coal mining activities to some extent.关键词
煤矿区/水化学特征/离子来源/控制因素/水质评价/水文地质调查工程Key words
coal mining area/hydrochemical characteristics/ion source/controlling factors/quality evaluation/hydrogeological survey engineering分类
资源环境引用本文复制引用
令狐昌卫,朱星强,徐磊,邹石林,管继云,柴楚,杨浪浪,和成忠,朱平平,寸得欣,刘振南..滇东富源典型煤矿区地下水水化学特征及水质评价[J].中国地质,2026,53(1):245-264,20.基金项目
中国地质调查局项目(DD20242172、DD20208075)、国家自然科学基金项目(42307058)、云南省"兴滇英才支持计划"青年人才项目(KKRD202221051)及云南省应用基础研究基金项目(202301AT070447)和云南省高层次科技人才及创新团队选拔专项(202305AT350004)联合资助. Supported by the projects of China Geological Survey(No.DD20242172,No.DD20208075),National Natural Science Foundation of China(No.42307058),Yunnan Talent Support Project(No.KKRD202221051),Natural Science Foundation of Yunnan Province(No.202301AT070447),and Yunnan Province High-level Scientific and Technological Talents and Innovation Team Selection Project(No.202305AT350004). （DD20242172、DD20208075）
