| 淮南煤田地下水水化学空间分布及其形成作用 |
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| 引用本文： | 汪子涛,刘启蒙,刘瑜.淮南煤田地下水水化学空间分布及其形成作用[J].煤田地质与勘探,2019,47(5):40-47. |
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| 作者姓名： | 汪子涛 刘启蒙 刘瑜 |
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| 作者单位： | 安徽理工大学地球与环境学院 |
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| 基金项目： | 国家重点研发计划项目课题（2017YFC0804101）；安徽省自然科学基金项目（1908085ME145） |
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| 摘 要： | 为探究淮南煤田地下水的空间分布情况及各项水化学作用的强度，将淮南煤田划分为松散层较厚的北部区域与松散层较薄的南部区域，收集了两区域16个矿井主要突水含水层的水化学测试数据，综合采用离子组合法、Gibbs图、氯碱指数等方法研究了各含水层的地下水水化学特征。研究结果表明:地下水总溶解固体与松散层埋藏厚度呈正相关，其均值范围在951.92~2 667.79 mg/L。随着松散层厚度的增大，脱硫酸、浓缩结晶及阳离子交替吸附等水化学成分形成作用得到增强，使SO42-不断消耗形成HCO3-，导致溶解度小的HCO3-结合Ca2+、Mg2+析出，并最终形成以NaCl主导的高矿化度水体。该结论将为深部煤矿区水害防治、水资源利用等提供一定借鉴作用。
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| 关 键 词： | 淮南煤田 水化学特征 地下水 水化学成分形成作用 |
| 收稿时间： | 2019-03-30 |
Spatial distribution and formation of groundwater hydrochemistry in Huainan coalfield |
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| Abstract: | In order to study the spatial distribution of groundwater in Huainan coalfield and the intensity of various hydrochemical actions, the coalfied is divided into the northern district with thicker loose beds and the southern district with thinner loose beds. Hydrochemical test data of main water-inrushing aquifers in 16 mines in these two areas were collected and statistically analyzed, ion combination method and Gibbs diagram were used to study the groundwater hydrochemical characteristics of each aquifer in north and south areas. The results indicate that TDS of aquifer is positively correlated with the burial thickness of unconsolidated formation. With the increase of the thickness of unconsolidated formation, the formation of hydrochemical components such as desulfurization, concentrated crystallization and cation alternating adsorption is enhanced, which makes SO42- consume continuously to form HCO3-, resulting in the precipitation of HCO3- bound Ca2+, Mg2+, and finally the formation of highly mineralized groundwater dominated by Cl-Na. |
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