微生物浸铀应力场-渗流场-化学场-生物场耦合模型及工程应用探讨  

Coupling model of reservoir deformation⁃fluid flow⁃chemical reaction⁃microbial growth for microorganism assisted uranium leaching

作　　者：崔光磊 杨道松 罗嘉明 陈天宇 杨成祥[1,2] CUI Guanglei;YANG Daosong;LUO Jiaming;CHEN Tianyu;YANG Chengxiang(School of Resources and Civil Engineering,Key Laboratory of Liaoning Province on Deep Engineering and Intelligent Technology,Northeastern University,Shenyang,Liaoning 110819,China;Key Laboratory of Liaoning Province on Deep Engineering and Intelligent Technology,Northeastern University,Shenyang,Liaoning 110819,China)

机构地区：[1]东北大学资源与土木工程学院,深部金属矿山安全开采教育部重点实验室,辽宁沈阳110819 [2]东北大学辽宁省深部工程与智能技术重点实验室,辽宁沈阳110819

出　　处：《采矿与安全工程学报》2024年第1期47-57,共11页Journal of Mining & Safety Engineering

基　　金：国家重点研发计划项目(2021YFC2902101)。

摘　　要：为了研究微生物浸铀工艺过程中的微生物行为特征和工艺参数对铀地浸效果的影响,建立了同时考虑微生物生长的储层变形、物质运移传递和化学反应的微生物浸铀耦合模型,以新疆伊犁盆地某砂岩型铀矿为工程背景,采用COMSOL Multiphysics有限元分析软件针对微生物浸铀过程进行了数值模拟。结果表明:微生物浸铀过程中浸出液铀浓度整体趋势为浸出开始后逐渐上升,400 d左右达到峰值,最后再缓慢下降;抽注单元尺度分析浸铀过程存在溶浸死角;抽注液流量越高,浸出液铀浓度所能达到的峰值也就越高;微生物数量与可逆解吸附速率和最大比生长速率呈正相关,与可逆吸附速率和比衰亡速率呈负相关;抽注液井附近由于流体压力的不同,渗透率的演化规律也不同。研究结果对于微生物浸铀工艺有一定的指导意义。To study the influence of microbial behavior characteristics and process parameters on the in⁃situ leaching of uranium in the process of microbial leaching of uranium,a microbial leaching uranium coupling model considering reservoir deformation,material migration and transfer,and chemical reaction of microbial growth was established.Based on the engineering background of a sandstone⁃type uranium mine in Ili Basin,Xinjiangc2ʍ,COMSOL Multiphysics finite element analysis software was used to simulate the process of microbial leaching of uranium.The results showed that,in the process of micro⁃bial leaching of uranium,the uranium concentration in the leaching solution gradually increased after the start of leaching,reached the peak value around 400 days,and finally decreased slowly.From the analy⁃sis of a five⁃point pumping well and injection well unit scale,a reaction dead angle in the process of in⁃situ leaching of uranium was found.The higher the flow rate of extraction and injection was,the higher the peak value of uranium concentration in the leaching solution could be reached.The number of micro⁃organisms was positively correlated with the reversible desorption rate and the maximum specific growth rate,and negatively correlated with the reversible adsorption rate and the specific decay rate.The evolu⁃tion law of permeability near the pumping well and the injection well was also different due to the differ⁃ent fluid pressures.The research results had a certain guiding significance for the microbial uranium leac⁃hing process.

关 键 词：微生物 地浸采铀 数值模拟 多场耦合 

分 类 号：TD862[矿业工程—金属矿开采]