转龙湾煤矿高氟地下水水化学特征及成因分析  

Hydrochemical characteristics and cause analysis of high fluoride groundwater in Zhuanlongwan coal mine

作　　者：齐俊铭 刘久潭 王保齐 李廷 朱敬 高波 乔斌 谷允鹏 QI Junming;LIU Jiutan;WANG Baoqi;LI Ting;ZHU Jing;GAO Bo;QIAO Bin;GU Yunpeng(Ordos Zhuanlongwan Coal Co.,Ltd.,Ordos 017000,China;College of Earth Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Yankuang Energy(Ordos)Co.,Ltd.,Ordos 017000,China)

机构地区：[1]鄂尔多斯市转龙湾煤炭有限公司,内蒙古鄂尔多斯017000 [2]山东科技大学地球科学与工程学院,山东青岛266590 [3]兖矿能源(鄂尔多斯)有限公司,内蒙古鄂尔多斯017000

出　　处：《煤矿安全》2024年第7期188-197,共10页Safety in Coal Mines

基　　金：山东省自然科学基金资助项目(ZR2021QD048);山东省博士后创新资助项目(202103019)。

摘　　要：为了解转龙湾煤矿高氟地下水水化学特征及其形成机制,选取第四系地下水(QGW)、砂岩地下水(SGW)和矿井水(MGW)水样共48个,综合运用统计分析和水化学等方法进行了相关分析。结果表明:转龙湾煤矿地下水整体表现为弱碱性,主要阳离子为Ca^(2+)和Na^(+),阴离子为HCO_(3)^(-)和Cl^(–);地下水中SO_(4)^(2–)、Cl^(–)、TDS、pH、CO_(3)^(2–)质量浓度均值大小关系为MGW>SGW>QGW,而HCO_(3)^(-)和F^(-)则存在着SGW>MGW>QGW的特点;QGW、SGW、MGW中F^(-)质量浓度的均值分别为0.76、4.55、4.35 mg/L,且SGW、MGW中多数水样的F^(-)质量浓度均远超过了标准中的限值(1.0 mg/L);低氟地下水(ρF^(-)<1 mg/L)水化学类型主要为HCO_(3)^(-)Ca·Mg型,而高氟地下水(ρF^(-)>1 mg/L)的水化学类型主要为HCO_(3)^(-)Na(35.42%)和SO_(4)·Cl^(-)Na(45.83%);转龙湾煤矿高氟地下水中F^(-)主要来源为含氟矿物的溶解,此外阳离子交换作用、竞争吸附以及白云石和方解石的溶解沉淀也是高氟地下水形成的重要影响因素。In order to gain insight into the hydrochemical characteristics and formation mechanism of high fluoride groundwater in Zhuanlongwan Coal Mine,we conducted a comprehensive analysis of 48 samples including quaternary groundwater(QGW),sandstone groundwater(SGW),and mine water(MGW)using statistical analysis and hydrochemical methods.The findings demonstrate that the groundwater in Zhuanlongwan Coal Mine generally exhibits weak alkalinity,with predominant cations comprising of Ca^(2+)and Na^(+),and anions consisting of HCO_(3)^(–)and Cl^(–).The mean mass concentration of SO_(2)^(4–),Cl^(-),TDS,pH,and CO_(2)^(3–)in groundwater follows the order of MGW>SGW>QGW,whereas HCO_(3)^(-)and F^(–)exhibit the trend of SGW>MGW>QGW.Specifically,the average mass concentration of F^(-)in QGW,SGW,and MGW is 0.76 mg/L,4.55 mg/L,and 4.35 mg/L,respectively.Notably,most samples from SGW and MGW significantly exceed the permissible F^(-)concentration threshold of 1.0 mg/L.The hydrochemical type of low fluoride(ρF^(-)<1 mg/L)groundwater is primarily identified as HCO_(3)-Ca·Mg,whereas,the hydrochemical types of high fluoride groundwater(ρF^(-)>1 mg/L)are mainly HCO_(3)-Na(35.42%)and SO_(4)·Cl^(-)Na(45.83%).The dissolution of fluorinated minerals serves as the main source of F^(–) in the high fluoride groundwater of Zhuanlongwan Coal Mine.Moreover,cation exchange,competitive adsorption,as well as the dissolution and precipitation of dolomite and calcite,are significant factors influencing the occurrence of high fluoride groundwater.

关 键 词：地下水 水化学特征 高氟 形成机制 转龙湾煤矿 

分 类 号：TD741[矿业工程—矿井通风与安全]