煤矿矿井水水质形成及演化的水化学-微生物场作用及数学模型构建  

Hydrochemical-microbial field interaction and mathematical model construction of the water quality formation and evolution in coal mine

作　　者：张莉 徐智敏[1,2] 孙亚军 高雅婷[1] 陈歌 朱璐璐 ZHANG Li;XU Zhimin;SUN Yajun;GAO Yating;CHEN Ge;ZHU Lulu(School of Resources and geosciences,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Fundamental Research Laboratory for Mine Water Hazards Prevention and Controlling Technology,Xuzhou,Jiangsu 221006,China;China Coal Aerial Survey and Remote Sensing Group Co.,Ltd.,Xi′an,Shaanxi 710199,China)

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221116 [2]矿山水害防治技术基础研究国家级专业中心实验室,江苏徐州221116 [3]中煤航测遥感集团有限公司,陕西西安710199

出　　处：《中国矿业大学学报》2024年第5期943-959,共17页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(42172272);国家重点研发计划项目(2019YFC1805400,2023YFC3012103)。

摘　　要：矿井水的水质形成及演化过程非常复杂,受水动力场、水化学场和微生物场等多场控制.建立水化学场-微生物场耦合作用数学模型是构建多场耦合模型的重要内容.本文在构建矿井水水质形成及演化的水动力场数学模型基础上,选取以高盐(SO_(4)-Na型)为主要矿井水水质特征的华北典型矿井作为模式研究区,开展室内微宇宙模拟试验.利用水文地球化学测试、微生物高通量测序等手段,探究水化学场与微生物场耦合作用下的水质演化过程.全封闭、前期半封闭和高煤3组对比试验结果表明:全封闭试验组体系中特征污染物为SO_(4)^(2-),浓度整体先增加后降低,截止365 d时相较于浓度最高点降低了14.3%;前期半封闭时SO_(4)^(2-)浓度低于封闭试验体系,而后期封闭后又高于全封闭试验组,说明氧气对SO_(4)^(2-)的来源与去路存在明显影响;试验前期明显的H2S气味证明发生了硫酸盐还原反应;参与硫循环的相关菌属(主要包括硫氧化菌和硫酸盐还原菌)丰度与SO_(4)^(2-)的浓度变化密切相关.反应体系中对SO_(4)^(2-)浓度产生影响的主要作用包括吸附/解吸、溶解/沉淀、硫氧化菌参与的黄铁矿氧化作用以及硫酸盐还原菌参与的硫酸盐还原作用.在此基础上分别建立影响SO_(4)^(2-)浓度4个作用的数学模型,并与微生物场耦合构建了煤矿矿井水水质形成及演化的水化学-微生物场数学模型.该模型反映了水化学与微生物作用下的水质演化内在机制,并为后续构建煤矿区地下水污染的多场耦合数值模型奠定基础.The formation and evolution process of mine water quality is very complex,controlled by multiple fields such as hydrodynamic field,hydrochemical field,and microbial field.Establishing a mathematical model for the coupling effect between hydrochemical and microbial fields is an important aspect of constructing a multi field coupling model.After constructing a mathematical model of the hydrodynamic field,this study selected typical mines in North China with high salinity(SO_(4)-Na type)as the main characteristic of mine water quality as the model research area to conduct indoor microcosmic simulation experiments.The water quality evolution process under the coupling effect of hydrochemicalwas exploredand microbial fields methods such as hydrogeochemical testing and high-throughput microbial sequencing were used.The comparative test results of three groups:fully enclosed,pre semi enclosed,and high coal show that the characteristic pollutant in the fully enclosed experimental group system is SO_(4)^(2-),with an overall increase and then decrease in concentration.As of 365days,the concentration decreased by 14.3%compared to the highest point.The concentration of SO_(4)^(2-) in the early stage of semi closure was lower than that in the closed experimental system,while in the later stage of closure it was higher than that in the fully closed experimental group,indicating that oxygen has a significant impact on the source and destination of SO_(4)^(2-).The obvious H2S odor in the early stage of the experiment indicates that sulfate reduction has occurred in the system.The abundance of related bacterial genera(mainly including sulfur oxidizing bacteria and sulfate reducing bacteria)involved in the sulfur cycle is closely related to the concentration changes of SO_(4)^(2-).Based on the comprehensive analysis of the experimental results,there are four main effects in the system that affect the concentration of SO_(4)^(2-),including adsorption/desorption,dissolution/precipitation,pyrite oxidation by sulfur oxidizing bacteria

关 键 词：矿井水水质 生物地球化学作用 水化学场 微生物场 数学模型 

分 类 号：TD745[矿业工程—矿井通风与安全]