不同温度和压力作用下砂岩型铀矿溶液的渗透特性研究  

Permeability characteristics of sandstone-type uranium deposits under different temperature and confining pressure

作　　者：尹升华 杨小艳 陈威 王雷鸣 陈勋 YIN Sheng-hua;YANG Xiao-yan;CHEN Wei;WANG Lei-ming;CHEN Xun(Key Laboratory of Ministry of Education for High-efficient Mining and Safety of Metal,University of Science and Technology Beijing,Beijing 100083,China;School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]Key Laboratory of Ministry of Education for High-efficient Mining and Safety of Metal,University of Science and Technology Beijing,Beijing 100083,China [2]School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China

出　　处：《Journal of Central South University》2023年第7期2302-2312,共11页中南大学学报（英文版）

基　　金：Project(52034001)supported by the Key Program of National Nature Sciencal Foundation of China。

摘　　要：原位溶浸是实现深地铀矿流态化开采的主要途径,具有安全性高、污染小和成本低等特点。然而,深地铀矿开采是在高温高压环境下进行的,这极大地影响了铀矿床的渗透性。本论文以砂岩型铀矿为研究对象,利用多介质多相流动实验模拟系统,开展温度和围压作用下溶液渗流实验,研究温度和压力对砂岩型铀矿溶液渗流特性的影响,分析温度和压力对砂岩型铀矿溶液渗流影响规律和影响机理。基于实验测得的矿样渗透率数据,使用Origin软件对实验数据进行处理,进而分析温度和压力对砂岩型铀矿渗透特性的影响。结果表明:砂岩型铀矿渗透率随温度的升高而增大,随围压的增大而减小。温度对渗透率的影响高于围压对渗透率的影响。从渗透率随温度、围压的变化率曲线图来看,温度越高,不同围压条件下的渗透率变化越显著,围压越低,不同温度条件下的渗透率变化规律越显著,温度在80℃、围压在6.0 MPa下砂岩型铀矿渗透率最大。In-situ leaching is the main way to realize fluidization mining of deep uranium ore,which has the characteristics of safety,low pollution and low cost.However,deep uranium mining is under high temperature and high pressure,which greatly affect the permeability of uranium deposit.The sandstone-type uranium deposits were taken as the research object in this paper,and a multiphase and medium flow experimental simulation system were used for solution seepage experiment under the action of temperature and confining pressure.Based on the permeability data obtained during the experiment,Origin software was used to process the experimental data.The results indicated that the permeability of sandstone-type uranium ore increased with temperature increased and decreased with confining pressure increased.The influence of temperature on permeability was higher than that of confining pressure.According to the trend of permeability change under the action of temperature and pressure,the higher the temperature,the more significant the permeability change under different confining pressure.The lower the confining pressure,the more significant permeability change under different temperatures.The maximum permeability of sandstone-type uranium ore was obtained under temperature of 80℃and confining pressure of 6.0 MPa.

关 键 词：深部铀矿开采 温度 围压 渗透率 

分 类 号：TD868[矿业工程—金属矿开采]