新集二矿2401工作面灰岩含水层水文地球化学特征研究

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关键词：淮南煤田；灰岩含水层；水文地球化学特征

中图分类号：P641 文献标志码：A 文章编号：1003-5168（2025）13-0121-06

DOI：10.19968/j.cnki.hnkj.1003-5168.2025.13.024

Hydrogeochemical Characteristics ofLimestone Aquifer in 2401 Panel of Xinji No. 2 Mine

ZHOU PengjuLI Jibao （China Coal Xinji Energy Co.，Ltd.，Xinji No.2 mine，Huainan 232002，China）

Abstract： [Purposes] In view of the complex hydrogeological conditions of Huainan coalfield，this study systematicallyanalyzes the hydrogeochemical characteristics of groundwater incoal mines to identify the main water sources that pose a threat to coal mining.[Methods] Taking Xinji No.2 mine and 24Ol panel of Huainan City as a case study，Piper three-line analysis and major ion analysis methods were employed to systematically investigate the variation trend of hydrochemical types and ionic concentration gradients with depth acrosslimestone aquifers in the mining area.[Findings] According to the results of hydrochemical analysis，the water quality of Taiyuan Formation limestone is mainly HCO 3 ·Cl-Na type， the Ordovician limestone is Cl-Na type，while the Cambrian limestone is Cl ⋅⋅ HCO NA type，and the wa3 ter quality of panel 24O1 is classified as SO 4 ·HCO 3 -Na type.With the increase of mining depth，the concentrations of Ca2+ ， Mg2+ ，Na++K+and Cl- decreases，while concentration of SO progressively rises. The concentration of HCO3- remains relatively stable with the increase of mining depth.[Conclusions] The Taiyuan Formation limestone aquifer is a direct water-filling aquifer，while the Ordovician limestone is an indirect water-filling aquifer.Inaddition，the variation patterns of ion concentrations with depth is revealed， which provides a scientific basis for formulating targeted measures to prevent and control mine waterhazards，and thus helping to reduce the risk of water inrush accidents. Keywords：Huainan coal field; limestone aquifer; hydrogeochemical characteristics

0 引言

随着浅部煤炭资源开采的逐步完成，两淮矿区的矿井作业重心逐步深人到更为复杂且深层的区域。（剩余6209字）