摘要
由于地浸开采工艺成本低、见效快、环境污染小,已成为当前砂岩型铀矿床开采主要手段,而砂岩型铀矿床的水文地质条件是决定其能否进行地浸开采的关键性因素。简要介绍了巴彦乌拉铀矿床芒来地段地质及水文地质特征,重点对芒来地段砂岩型铀矿的水文地质条件、含矿含水层岩性和水文地质参数等特性进行了分析评价,综合分析认为:芒来地段含矿含水层厚度相对较为适宜,具有稳定的隔水顶底板,水文地质结构理想,其地下水水位埋深浅、承压水头较高、涌水量大,含矿层渗透性强、导水能力和连通性均好,其矿体主要产于含矿含水层的中下部和底部,矿体埋藏较浅,具备地浸开采的基本水文地质条件,地浸水文地质条件总体为有利,适宜于用地浸方法开采。
Natural uranium is an important strategic resource to meet national defense needs and ensure national security.Sandstone-type uranium deposit is the main type of uranium resources developed in China,and their production capacity determines national natural uranium production capacity.Due to the low cost,quick effect and low environmental pollution of in-situ leaching mining technology,it has become the main method of sandstone-type uranium deposits.The hydrogeological conditions of sandstone-type uranium deposits are the key determinants of whether it can be in-situ leached.The geological and hydrogeological characteristics of the Manglai area of the Bayanwula uranium deposit were introduced briefly in the paper,focusing on the analysis and evaluation of the hydrogeological conditions,ore-bearing aquifer lithology,and hydrogeological parameters.The analysis showed that the thickness of the ore-bearing aquifer in the Manglai area is suitable for in-situ leaching,with stable roof and floor,ideal hydrogeological structure,small groundwater level and strong confined water head,and large water inflow,Besides,The permeability of the ore bed is strong,the water conductivity and connectivity are good,and the ore body mainly occured in the lower part or bottom of the ore-bearing aquifer.Therefore,this area has the basic hydrogeological conditions and favorable for the in-situ leaching generally.
作者
任晓平
刘晓敏
彭瑞强
黄镪俯
杜鹏飞
戈燕忠
REN Xiaoping;LIU Xiaomin;PENG Ruiqiang;HUANG Qiangfu;DU Pengfei;GE Yanzhong(Geological Party No.208,CNNC,Baotou,Inner Mongolia 014010,China;China Nuclear Inner Mongolia Mining Co.,Ltd.,Hohhot,Inner Mongolia 010020,China)
出处
《世界核地质科学》
CAS
2022年第1期70-76,共7页
World Nuclear Geoscience
基金
中国核工业地质局内蒙古二连盆地铀矿资源调查评价与勘查项目(编号:201901)资助。
关键词
芒来地段
地浸
水文地质条件
分析评价
Manglai area
in-situ leaching
hydrogeological conditions
analysis and evaluation
