中关铁矿地下水化学组分演变特征分析

Analysis of the Evolution Characteristics of Groundwater Chemical Components in Zhongguan Iron Mine

为探明中关铁矿在进行建设及开采时,地下水水化学组分受地下水流场变化及水-岩相互作用的影响程度,本文利用Piper三线图、聚类离子分析及离子比值图等分析手段,对中关铁矿地下水水化学组分演变特征进行研究分析。结果表明:奥灰水的水化学类型为HCO_(3)^(-)Ca·Mg型;混水为HCO3·SO_(4)-Ca·Mg型;岩体水为SO_(4)-Ca·Mg型。奥灰水与岩体水中Ca^(2+)浓度变化最大,而混水中Mg^(2+)浓度变化最大;奥灰水与混水中HCO_(3)^(-)浓度变化最大,而岩体水中SO_(4)2-浓度变化最大。其中,地下水中Ca^(2+)、Mg^(2+)和SO_(4)^(2-)是TDS值的主要影响因素。该研究结果有助于深入研究铁矿区地下水系统循环过程,为地下水资源的管理、开发利用与保护提供依据。

In order to ascertain the extent to which groundwater chemical components in Zhongguan Iron Mine are affected by changes in the groundwater flow field and water-rock interactions during construction and mining,this paper employs analytical methods such as Piper trilinear diagrams,cluster ion analysis,and ion ratio graphs.The study analyzes the evolution characteristics of the groundwater chemical components in Zhongguan Iron Mine.The results indicate that the water chemistry type of ophiolite water is HCO_(3)^(-)Ca·Mg;mixed water is HCO3·SO_(4)-Ca·Mg;and rock body water is SO_(4)-Ca·Mg type.The largest variation in Ca^(2+)concentration is observed in ophiolite water and rock body water,while the largest variation in Mg^(2+)concentration is in mixed water.The largest variation in HCO-3 concentration is in ophiolite water and mixed water,whereas SO_(4)^(2-)concentration varies most in rock body water.Among these,Ca^(2+),Mg^(2+),and SO_(4)^(2-)are the main influencing factors of TDS value in groundwater.The results of this study contribute to a deeper investigation of the groundwater system cycle in the iron ore area and provide a basis for the management,development,utilization,and protection of groundwater resources.