摘要
为了了解宁夏宁东煤田积家井矿区水文地质特征及评价该区煤炭资源的开发地质条件,详细分析了矿区含水层组,隔水层组,构造与富水性关系以及地下水补给径流排泄条件。研究认为该区含水层组主要包括第四系及古近系松散层孔隙潜水含水层组、风化岩裂隙含水层组、侏罗系中统直罗组孔裂隙承压含水层组、侏罗系中统延安组砂岩含水层组;隔水层组包括第四系及古近系隔水层组、侏罗系中统安定组及直罗组上部泥岩隔水层组、侏罗系中统延安组泥岩隔水层组。基岩承压地下水的富水性往往与地质构造关系密切,高角度逆冲断层容易成为导水构造。地下水的运移方向和垂向蒸发或渗透是地下水补给径流排泄的主要因素。
To study the hydrogeological characteristics and evaluate the coal geological conditions in Jijiajing mining area of Ningdong coal field,analyse the aquifer system,aquifuge system,the relationship between tectonic and water abundance,the supply,runoff,excretion conditions of groundwater.The results show that the aquifer systems contain Quaternary and Paleogene unconsolidated layers pore phreatic water,weathered rock fissured water,confined water in pores or fissures of Jurassic Formation,sandstone water of Yanan Formation.Aquifuge systems contain Quaternary and Paleogene aquifuge,mudstone aquifuge of Anding Formation and upper Jurassic Formation,mudstone aquifuge of Yanan Formation.The water abundance of bedrock confined groundwater has a relationship with geological structure,and high-angle thrust fault easier to be water conductivity structure.Migration direction,vertical evaporation and vertical infiltration of groundwater are the main factors of supply,runoff,and excretion of groundwater.
出处
《洁净煤技术》
CAS
2012年第4期102-104,117,共4页
Clean Coal Technology
基金
油气沉积地质教育部创新团队(IRT0864)
