不连沟井田岩溶水水化学特征及其演化规律研究  

Hydrochemical characteristics and evolution laws of karst water in Buliangou mine field

作　　者：李双慧 朱宏军 朱开鹏 黄选明 Li Shuanghui;Zhu Hongjun;Zhu Kaipeng;Huang Xuanming(CCTEG Xi′an Research Institute(Group),Xi′an 710054,China;Key Laboratory of Coal Mine Water Control Technology in Shaanxi Province,Xi′an 710077,China)

机构地区：[1]中煤科工西安研究院(集团)有限公司,陕西西安710054 [2]陕西省煤矿水害防治技术重点实验室,陕西西安710077

出　　处：《能源与环保》2024年第2期155-162,共8页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：陕西省自然科学基金项目(2022JQ-320)。

摘　　要：岩溶水害是准格尔煤田安全生产的重大隐患之一,在分析准格尔煤田东北部不连沟井田水文地质条件的基础上,运用水文地球化学和数理统计的方法,查明研究区水化学特征及演化规律,为矿井水害治理提供科学依据。研究结果表明:①研究区岩溶地下水pH值为7.5~8.35,呈弱碱—偏碱性,TDS小于1000 mg/L,整体为淡水;岩溶水水化学类型包括HCO_(3)^(-)Na·Ca·Mg型水、HCO_(3)·Cl^(-)Na·Ca型水和Cl^(-)Na型水;Na^(+)、Ca^(2+)、HCO_(3)^(-)、Cl^(-)、SO_(4)^(2-)为岩溶水的主要阴阳离子。②岩溶地下水水化学组分主要受水岩作用及阳离子交替吸附作用的影响;Na^(+)、Cl^(-)主要来源为盐岩的溶解或阳离子交换作用,Ca^(2+)、Mg^(2+)、HCO_(3)^(-)主要来源为方解石、白云石的溶解,SO_(4)^(2-)离子主要来自石膏的溶解和黄铁矿氧化。③反向水文地球化学模拟表明,沿岩溶地下水径流方向发生的主要水岩作用包括方解石、白云石的沉淀和溶解,石膏、盐岩和CO_(2)的溶解,Na-Ca阳离子交换。Karst water damage is one of the major hidden hazards in the safety production of Jungar coalfield.Based on the analysis of hydrogeological conditions in the northeastern part of the Jungar coalfield,the hydrogeological geochemical and mathematical statistical methods were applied to identify the water chemistry characteristics and evolution laws in the study area and provide a scientific basis for mine water damage management.The results show thated:①The pH of karst groundwater in the study area was ranging from 7.5 to 8.35,which was weak alkaline to slightly alkaline.TDS was less than 1000 mg/L,and the whole was fresh water.The karst water chemical types included HCO_(3)-Na·Ca·Mg type water,HCO_(3)·Cl^(-)Na·Ca type water and Cl^(-)Na typewater.The main anions and cations in karst water were Na^(+),Ca^(2+),HCO_(3)^(-),Cl^(-)and SO_(4)^(2-).②The water chemistry components of karst groundwater were mainly influenced by water rock interaction and cation exchange and adsorption.The main sources of Na^(+)and Cl^(-)could either be major from halite dissolution or cation exchange.The main sources of Ca^(2+),Mg^(2+)and HCO_(3)^(-) were mainly from the dissolution of calcite and dolomite.SO_(4)^(2-) came mostly from gypsum dissolution and pyrite oxidation.③The inverse hydrogeochemical simulation showed that the main hydrometeor effects occurring along the direction of karst groundwater runoff include precipitation and dissolution of calcite and dolomite,dissolution of gypsum,halite and CO_(2),and Na-Ca cation exchange.

关 键 词：不连沟井田 岩溶地下水 水化学特征 Gibbs图 反向水文地球化学模拟 

分 类 号：TD745[矿业工程—矿井通风与安全]