神东矿区纳林河二号矿井延安组煤层顶板富水区规律  

Yan'an Formation Coal Roof Water Rich Zone Pattern in Narin Gol No.2 Coalmine,Shendong Mining Area

作　　者：陈晨[1,2] 贾建称 董夔[1,2] 巩泽文 刘云亮 Chen Chen;Jia Jiancheng;Dong Kui;Gong Zewen;Liu Yunliang(China Coal Research Institute,Beijing 100013;Xi’an Research Institute,China Coal Technology&Engineering Group Corp,Xi’an Shaanxi 710054)

机构地区：[1]煤炭科学研究总院,北京100013 [2]中煤科工集团西安研究院有限公司,陕西西安710054

出　　处：《中国煤炭地质》2018年第4期36-44,共9页Coal Geology of China

基　　金：国家科技支撑计划项目(2012BAB13B02)

摘　　要：纳林河矿区水文地质条件复杂多变,煤矿安全生产建设受隐蔽水患威胁严重。以纳林河二号矿井为例,采用地质分析、测试实验相结合的方法研究了3-1煤层顶板砂岩的岩石学特征,沉积作用、成岩作用、后生作用对水理学性质的影响,揭示矿井水患的地质控制规律。结果表明;沉积作用、成岩作用是富水性强弱的重要因素;后生作用形成的高角度微裂缝、小型褶皱及断层等对矿区富水性影响不大。纳林河矿井河道砂坝砂体的透水性好于三角洲平原分流河道与决口扇砂体,易形成富水性强的区域;同一古河流中,中下游及河床相砂体的富水性强,上游和边滩、漫滩砂体的孔渗条件差、透水性和富水性弱。The Narin Gol No.2 coalmine has complex and variable hydrogeological conditions.Safety production and construction of coalmine have been threatened seriously by shadowy flood.Taking this coalmine as example,through geological analysis combined with tests and experiments,studied impacts from coal No.3-1 roof sandstone lithologic features,sedimentation,lithogenesis and epigenesis on hydrological properties,thus revealed coalmine flood geological control pattern.The result has shown that the sedimentation and lithogenesis are major factors to impact water yield property strong or weak.High-angle microfractures,minor folds and faults formed by epigenesis have only negligible effects on coalmine area water yield property.In the mine area,water perviousness of channel bar sand body is better than delta plain distributary channel and crevasse splay sand bodies,thus easy to form strong water yield property domain.In a same paleochannel,middle and lower reaches and bed phase sand bodies have strong water yield property;upper reaches and point bar,flood-plain sand bodies have poor porosity and permeability conditions,weak perviousness and water yield property.

关 键 词：沉积相 成岩作用 后生作用 富水性 

分 类 号：TD7452[矿业工程—矿井通风与安全]