基于岩性及结构特征的砂岩含水层富水性评价  

Water-abundance evaluation of sandstone aquifer based on lithologic and structural characteristics

作　　者：魏久传 赵智超 谢道雷 俞功一山 吴霞 WEI Jiuchuan;ZHAO Zhichao;XIE Daolei;YU Gongyishan;WU Xia(College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China;Geophysical Prospecting and Surveying Team, Shandong Bureau of Coal Geological Exploration, Jinan, Shandong 250104, China)

机构地区：[1]山东科技大学地球科学与工程学院,山东青岛266590 [2]山东省煤田地质局物探测量队,山东济南250104

出　　处：《山东科技大学学报（自然科学版）》2020年第3期13-23,共11页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(41702305,51509148);“十三五”国家重点研发计划项目(2017YFC0804100)。

摘　　要：煤层顶底板砂岩水害是常见的矿井水害类型之一,其影响程度与含水层富水性密切相关。以营盘壕煤矿22采区2煤层为例,分析了顶板砂岩含水层的富水性影响因素,选取了以砂岩等效厚度、砂岩岩性系数、岩芯采取率及砂泥岩层比率等4项指标作为含水层富水性的评价指标,采用熵权系数法、主成分分析法和层次分析法确定各指标的权重,构建富水性预测模型,基于该模型对砂岩含水层的富水性进行评价。结果表明,研究区顶板砂岩含水层富水性具有强、中、弱3个等级的分区,其中直罗组砂岩含水层以弱-中等富水区为主,强富水区零星分布,志丹群砂岩含水层则以中等-强富水区为主,弱富水区零星分布。富水性评价结果与钻孔抽(放)水试验的单位涌水量具有较好的一致性。The common types of mining and sandstone water damages in roof and floor of coal seam is closely related to the water abundance of aquifer.The No.2 coal seam in Yingpanhao No.22 underground Coal mine was taken as an example to analyze the influencing factors of water abundance of roof sandstone aquifer.Four indexes,including equivalent thickness of sandstone,lithology coefficient of sandstone,core recovery percentage,and ratio of layers of sandstone to mudstone,were selected as the evaluation indexes of water abundance.Entropy Weight Method(EWM),Principal Component Analysis(PCA)and Analytic Hierarchy Process(AHP)were adopted to determine the weight of each index.A prediction model was established to evaluate the water abundance of sandstone aquifer.The results show that the water abundance of roof sandstone aquifer in the study area can be divided into three levels,namely rich,medium,and weak.The Zhiluo Formation sandstone aquifer is mainly of weak-medium water abundance with sporadically-distributed rich water abundance,while the Zhidan Formation sandstone aquifer is mainly of medium-rich water abundance with sporadically-distributed weak water abundance.The evaluation results have better consistency with the unit water inflow in the drilling(discharge)water test data.

关 键 词：富水性评价 熵权系数法 主成分分析法 层次分析法 砂岩含水层 

分 类 号：TD745[矿业工程—矿井通风与安全]