鄂尔多斯盆地北部某砂岩型铀矿地下水水位异常成因分析  

Origin of Groundwater Level in a Sandstone-type Uranium Mine in the Northern Ordos Basin

作　　者：王乐力 丁叶[2] 王贵 刘正邦[2] 高俊义 江国平[2] 王亚奴 赵海军 WANG Leli;DING Ye;WANG Gui;LIU Zhengbang;GAO Junyi;JIANG Guoping;WANG Yanu;ZHAO Haijun(Research Institute No.203,CNNC,Xianyang 712000,China;Beijing Research Institute of Chemical Engineering and Metallurgy,CNNC,Beijing 101149,China;Geological Party No.208,CNNC,Baotou 014010,China;Inner Mongolia Mining Co.,Ltd.,CNNC,Hohhot 010010,China)

机构地区：[1]核工业二〇三研究所,陕西咸阳712000 [2]核工业北京化工冶金研究院,北京101149 [3]核工业二〇八大队,内蒙古包头014010 [4]中核内蒙古矿业有限公司,内蒙古呼和浩特010010

出　　处：《铀矿冶》2022年第3期248-255,共8页Uranium Mining and Metallurgy

摘　　要：鄂尔多斯盆地北部直罗组砂岩型铀矿和延安组煤炭资源在空间上呈异层叠置产出。通过对直罗组下段下亚段含矿含水层地下水水位异常下降态势的分析研究,认为延安组煤炭资源开发时的疏放水作业造成了其上部直罗组含矿含水层水位持续下降,对砂岩型铀矿矿体空间形态和含矿含水层水位稳定产生了不利影响。针对空间上异层叠置的铀矿和煤炭资源,在开发次序上应先上后下、先铀后煤。如煤层与铀矿同时开采,则煤层开采作业区与地浸开采作业区需设置一定的安全距离,采前疏放和采后疏干不得影响上部砂岩型铀矿空间产出形态和含水层水位稳定,同时为确保井场承压水头稳定,铀矿地浸井场作业区需配套相应的工程措施。The sandstone-type uranium deposits of the Zhiluo Formation and the coal resources of the Yan'an Formation in the northern Ordos Basin are produced in different layers in space.Based on the research on the abnormal decline of groundwater level in the lower sub-member of the Zhiluo Formation,it is concluded that the water drainage operation during the development of coal resources in the Yan'an Formation has caused the water level of the upper Zhiluo Formation ore-bearing aquifer to continue to decline.The spatial morphology of the ore body and the stability of the water level of the ore-bearing aquifer have adverse effects.For spatially stacked uranium mines and coal resources,the development sequence should be up first,then down,and uranium followed by coal.If the coal seam and uranium ore are mined at the same time,a certain safety distance should be set between the coal mining operation area and the in-situ leaching mining operation area,and the pre-mining and post-mining drainage should not affect the spatial output form of the upper sandstone-type uranium mine and the water level of the aquifer.At the same time,in order to ensure the stability of confined water head in the uranium mine in-situ leaching well field,it is necessary to establish corresponding engineering measures.

关 键 词：地下水 异常动态 异层叠置 砂岩型铀矿 鄂尔多斯盆地北部 

分 类 号：P641.2[天文地球—地质矿产勘探]