1. School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 　 221116, China;2. Xuzhou Coal Mining Group, Xuzhou 　221006,China

以位于吐哈盆地的大南湖矿区为例,结合该区侏罗系含煤地层渗透性好、富水性强、静储量大等典型特征,采用现场取样、压汞实验、扫描电镜等手段,系统研究了侏罗系西山窑组含水层的沉积环境、宏观地层结构、细观孔隙结构等含水介质特征;通过现场抽水试验及室内数据处理分析,研究了该含水层的循环条件及水动力特征。结果表明:研究区侏罗系含水层具有典型的隐伏古湖床沉积环境及高孔隙度、强渗透性、"孔隙-裂隙"双重含水介质共存的特殊水文地质结构特征;区域上,侏罗系含水层补给水源充沛,结合侏罗系含水层的双重介质特征,表现出具有明显滞后效应的水动力学特征,通过Boulton模型对水文地质参数进行校正,经现场试验,更符合该区地下水运动的实际规律。研究成果初步揭示了吐哈盆地富煤区由于地质沉积环境及岩性差异所导致的侏罗系含水介质结构及地下水动力场的特殊性。

Taking the Dananhu mining area located in Turpan-Hami basin as an example,combining with the typical characteristics of Jurassic coal bearing strata,such as good permeability,strong water content,and large reserves,using the methods such as field sampling,pressure mercury test,scanning electron microscope,the authors systematically studied the characteristics of water bearing medium in the aquifer of Jurassic System Xishanyao Formation including sedimentary environment,macro-formation structure and meso-pore structure. Based on the field pumping test and the analysis of data processing,this paper studied the circulation conditions and hydrodynamic characteristics of the aqui- fer. The results of this study show that the study area of Jurassic aquifer has a typical sedimentary environment of bur- ied ancient lake bed and a special hydro-geological structure characteristics of high porosity,strong permeability,the double aqueous medium of “porosity and fracture”. In regional area,due to the Jurassic aquifer recharge water source is abundant and its double aqueous medium quality,the water dynamic characteristics of obvious lag effect are shown. The hydro-geological parameters were corrected by the Boulton model, which was more close to the actual law of groundwater movement in the area through the field test. The research results in this paper are preliminarily revealed that in the coal rich zone of Turpan-Hami Basin,the particularity of Jurassic aquifer structure and groundwater dynamic field were caused by the differences of sedimentary environment and geological lithologies.

国家重点基础研究发展计划(973)资助项目(2013CB227901)；国家自然科学基金资助项目(41502282)；江苏高校优势学科建设工程资助项目；

Xu Zhimin,Gao Shang,Sun Yajun,et al. A study of conditions of water bearing media and water dynamics in typical Jurassic coal rich re- gions in western China[J]. Journal of China Coal Society,2017,42(2):444-451.