| 蒙陕接壤区浅埋煤层矿井水水化学特征及来源分析 |
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| 引用本文： | 王昱同,王皓,王甜甜,薛建坤,尚宏波,周振方.蒙陕接壤区浅埋煤层矿井水水化学特征及来源分析[J].煤田地质与勘探,2023,51(4):85-94. |
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| 作者姓名： | 王昱同 王皓 王甜甜 薛建坤 尚宏波 周振方 |
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| 作者单位： | 1.煤炭科学研究总院，北京 100013 |
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| 基金项目： | 陕西省重点研发计划项目(2022SF-046)；陕西省自然科学基础研究计划项目(2023-JC-QN-0291，2022JQ-471) |
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| 摘 要： | 为研究蒙陕接壤区浅埋煤层开采下矿井水水化学特征与来源，通过采集研究区内的矿井水、不同含水层地下水及地表水样，综合利用水化学特征研究、数理统计、离子比例系数法以及氢氧同位素，探究该区矿井水水化学特征及其形成作用。基于此，对研究区矿井水的主要来源进行了识别。结果表明，矿井水与第四系萨拉乌苏组、侏罗系直罗组和延安组地下水水力联系紧密。矿井水主要离子形成受水-岩作用影响，主要阴阳离子来源于硅酸盐矿物与方解石的溶滤作用；受到反向阳离子交换作用影响，使矿井水中Na+含量高于浅部地下水；混合作用对矿井水水化学成分形成影响较小。矿井水受延安组、直罗组地下水与萨拉乌苏组地下水共同补给，三者在矿井水补给水源中所占比例分别为86.39%、1.59%与12.02%。研究成果可为该区的矿井水害防治与水资源处理利用提供依据。
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| 关 键 词： | 蒙陕接壤区 浅埋煤层 水化学特征 氢氧同位素 形成作用 来源分析 |
| 收稿时间： | 2022-07-14 |
Hydrochemical characteristics and source analysis of mine water in shallow coal seams in Shaanxi and Inner Mongolia contiguous area |
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| Institution: | 1.China Coal Research Institute, Beijing 100013, China2.CCTEG Xi’an Research Institute Co., Ltd., Xi’an 710077, China3.Shaanxi Key Laboratory of Prevention and Control Technology for Coal Mine Water Hazard, Xi’an 700077, China |
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| Abstract: | In order to study the hydrochemical characteristics and sources of mine water under the mining of shallow coal seams in the contiguous area of Inner Mongolia and Shaanxi, the hydrochemical characteristics and the formation action of mine water in this area were investigated through the study of hydrochemical characteristics, mathematical statistics, ion ratio coefficient method and the hydrogen and oxygen isotopes in combination, by collecting samples of the mine water, groundwater in different aquifers and surface water in the study area. Based on this, the main sources of mine water in the study area were identified. The results show that the mine water is closely related to the groundwater hydraulics of Quaternary Salawusu Formation, Jurassic Zhiluo Formation and Yan'an Formation. Besides, the formation of main ions in mine water is affected by water-rock interaction, with the main anion and cation coming from the leaching of silicate minerals and calcite. Affected by reverse cation exchange, the content of Na+ in mine water is higher than that in the shallow groundwater. However, mixing has little effect on the formation of hydrochemical composition of mine water. The mine water is recharged by the groundwater of Yan'an formation, Zhiluo formation and Salawusu formation, accounting for 86.39%, 1.59% and 12.02% respectively in the recharging water sources. The research results could provide a basis for water hazard prevention and control of mine, as well as the treatment and utilization of water resources in this area. |
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