神府南区直罗组含水层富水性研究  

Water Yield Property of Zhiluo Formation Aquifer in the Southern Shenmu-Fugu Mine Area

作　　者：方楚婧 杨泽元[1,2,3] 范立民 马雄德 孙魁[5,6] 郭人泰 张奥奇 李舒[1,2,3] 刘胜祖 FANG Chujing;YANG Zeyuan;FAN Liming;MA Xiongde;SUN Kui;GUO Rentai;ZHANG Aoqi;LI Shu;LIU Shengzu(School of Water and Environment,Chang’an University,Xi’an 710054,China;Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of Education,Xi’an 710054,China;Engineering Research Center of Groundwater and Eco-Environment of Shaanxi Province,Xi’an 710054,China;School of Mines,China University of Mining and Technology,Xuzhou 221116,China;Key Laboratory of Mine Geological Hazard Mechanism and Control,Shaanxi Institute of Geo-Environment Monitoring,Xi’an 710054,China;School of Geology and Environment,Xi’an University of Science and Technology,Xi’an 710054,China)

机构地区：[1]长安大学水利与环境学院,陕西西安710054 [2]旱区地下水文与生态效应教育部重点实验室,陕西西安710054 [3]陕西省地下水与生态环境工程研究中心,陕西西安710054 [4]中国矿业大学矿业工程学院,江苏徐州221116 [5]陕西省地质环境监测总站矿山地质灾害成灾机理与防控重点实验室,陕西西安710054 [6]西安科技大学地质与环境学院,陕西西安710054

出　　处：《灾害学》2022年第3期219-226,共8页Journal of Catastrophology

基　　金：国家重点研发计划(2019YFC1805404);陕西煤业化工集团有限公司2020年度重点科研资助项目(2020SMHKJ-B-J-27);陕西省自然科学基础研究计划-陕煤联合基金重点资助项目(2019JLZ-03);国家自然科学基金项目(41272247)。

摘　　要：针对神府南区直罗组含水层的弱—中等富水性与煤矿开采实践中较大涌水量之间的矛盾,采用普通薄片、铸体薄片、压汞试验等测试技术,基于钻探、抽水试验和水质分析资料,从微观和宏观角度研究了直罗组含水层的富水性。根据孔隙、孔喉的大小分布及连通性,结合毛管压力曲线,将研究区的孔隙结构划分为Ⅰ、Ⅱ、Ⅲ、Ⅳ四种类型,对比钻孔单位涌水量,从Ⅰ类到Ⅳ类孔隙结构,其富水性从中等富水逐渐变成弱富水;孔隙度和渗透率主要受孔喉大小、孔隙及吼道面积所控制,渗透率还受孔喉连通性和孔喉分布集中程度的影响。直罗组含水层富水性影响因素分析表明沉积相是富水性强弱的主控因素,其次是天窗,第三是构造发育及岩石风化程度和岩层渗透性变异,这些影响因素的特定组合,可能导致局部强富水,威胁煤矿安全生产,需加强煤矿区含隔水层三维空间展布研究。Aiming at the contradiction between the weak to medium water yield property of Zhiluo Formation in the southern Shenmu-Fugu mining area and large water yield during coal mining,based on drilling,pumping test and groundwater quality data,water yield property of Zhiluo Formation aquifer was studied from the micro and macro perspectives by means of testing techniques such as thin section,cast thin section,mercury injection test,etc.According to the size,distribution and connectivity among pores and pore-throats,combined with capillary pressure curves,the pore structure was divided into TypeⅠ,Ⅱ,ⅢandⅣ.Comparing with water yield per drawdown of the boreholes,the water yield property gradually changes from medium to weak from TypeⅠto TypeⅣ.Its porosity was controlled by size and area of pores and throats,and its permeability was controlled not only by these two factors,but also by connectivity and sorting of pores and throats.The analysis of the influence factors on water yield property of Zhiluo Formation aquifer indicates that the sedimentary facies are the main controlling factor,followed by discontinuous distribution regions of aquifuges,and the third is structural development and the weathered extent and permeability variation in different stages.The specific combination of these influence factors may result in local strong water yield property,and threaten the safety of coal mines,so high-accuracy 3D researches of aquifers and aquifuges should be strengthened.

关 键 词：微观孔隙结构 富水性 单位涌水量 天窗 直罗组含水层 神府南区 

分 类 号：P641[天文地球—地质矿产勘探] X43[天文地球—地质学] X915.5[环境科学与工程—灾害防治]