Article(id=1236276106681176178, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236276104999268557, articleNumber=null, orderNo=null, doi=10.3969/j.issn.0253-6099.2025.04.003, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1740326400000, receivedDateStr=2025-02-24, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1772680792731, onlineDateStr=2026-03-05, pubDate=1753977600000, pubDateStr=2025-08-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1772680792731, onlineIssueDateStr=2026-03-05, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1772680792731, creator=13701087609, updateTime=1772680792731, updator=13701087609, issue=Issue{id=1236276104999268557, tenantId=1146029695717560320, journalId=1235980550691926019, year='2025', volume='45', issue='4', pageStart='1', pageEnd='200', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1772680792331, creator=13701087609, updateTime=1772681498687, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1236279067746562719, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236276104999268557, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1236279067746562720, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236276104999268557, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=14, endPage=21, ext={EN=ArticleExt(id=1236276106941223028, articleId=1236276106681176178, tenantId=1146029695717560320, journalId=1235980550691926019, language=EN, title=Analysis of In-Situ Leaching Characteristics and Scheme Optimization Based on 3D Heterogeneous Model, columnId=1236276106018484431, journalTitle=Mining and Metallurgical Engineering, columnName=MINING, runingTitle=null, highlight=null, articleAbstract=

A 3D heterogeneous numerical model was established based on the C6# mining area of the Bayan-Uul uranium deposit to analyze the effects of different horizontal permeability in the filter section on solute transport, pH value and uranium mineral leaching performance. The simulation results show that after 450 days, the uranium leaching rate is 13.56% at the vertical depth of 30 m in the filter section, presenting 22.71% higher compared to the leaching rate of 11.05% at the depth of 35 m. According to the sandstone permeability, grade of uranium in the stratum and heterogeneity, the vertical arrangement position and length of filter section can be optimized, so as to effectively improve the economically recoverable metal quantity.

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基于巴彦乌拉铀矿床C6#采区构建三维非均质性数值模型,分析过滤器段不同水平渗透率对溶质运移、pH值、铀矿物浸出性能的影响。模拟结果表明,第450 d过滤器布置段垂直30 m处铀矿浸出率为13.56%,35 m处铀矿浸出率为11.05%,30 m处铀矿浸出率较35 m处铀矿浸出率高出22.71%;根据空间砂岩渗透性、铀矿层品位以及非均质化程度,可以优化过滤器段的垂直布置位置和过滤器段长度,从而有效提高经济可采金属量。

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贾明滔(1973—),男,河南南阳人,博士,教授,主要从事数字矿山与矿山安全研究。E-mail:
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骆桂君(2000—),女,湖南常德人,硕士研究生,主要研究方向为地浸采铀技术和数值模拟。E-mail:

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Water Resources Research, 1996, 32(2): 419-430., articleTitle=Reactive solute transport in streams: 2. simulation of a pH modification experiment, refAbstract=null), Reference(id=1236348237775434347, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, doi=null, pmid=null, pmcid=null, year=2024, volume=null, issue=12, pageStart=119, pageEnd=128, url=null, language=null, rfNumber=[19], rfOrder=25, authorNames=满嘉乐, 丁德馨, 马建洪, journalName=有色金属(冶炼部分), refType=null, unstructuredReference=满嘉乐, 丁德馨, 马建洪, 等. 基于PHREEQC模拟分析铀矿退役采区地下水铀形态及其影响因素[J]. 有色金属(冶炼部分), 2024(12): 119-128., articleTitle=基于PHREEQC模拟分析铀矿退役采区地下水铀形态及其影响因素, refAbstract=null), Reference(id=1236348237834154604, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, doi=null, pmid=null, pmcid=null, year=2024, volume=null, issue=12, pageStart=119, pageEnd=128, url=null, language=null, rfNumber=[19], rfOrder=26, authorNames=MAN Jiale, DING Dexin, MA Jianhong, journalName=Nonferrous Metals (Extractive Metallurgy), refType=null, unstructuredReference=MAN Jiale, DING Dexin, MA Jianhong, et al. 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Nonferrous Metals (Extractive Metallurgy), 2024(12): 119-128., articleTitle=Analysis of groundwater uranium chemical form and its influencing factors in decommissioned mining area of uranium mine based on PHREEQC simulation, refAbstract=null)], funds=[Fund(id=1236348235774751304, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, awardId=52034001, language=CN, fundingSource=国家自然科学基金重点项目(52034001), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1236348228078203167, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, xref=1., ext=[AuthorCompanyExt(id=1236348228090786080, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, companyId=1236348228078203167, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1.School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China), AuthorCompanyExt(id=1236348228103368993, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, companyId=1236348228078203167, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1.中南大学 资源与安全工程学院,湖南 长沙 410083)]), AuthorCompany(id=1236348228208226599, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, xref=2., ext=[AuthorCompanyExt(id=1236348228216615209, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, companyId=1236348228208226599, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2.Engineering Research Center for Carbon Emission Reduction in Metal Resource Exploitation and Utilization, Ministry of Education, Changsha 410083, Hunan, China), AuthorCompanyExt(id=1236348228220809514, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, companyId=1236348228208226599, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2.金属资源开发利用碳减排教育部工程研究中心,湖南 长沙 410083)]), AuthorCompany(id=1236348228346638641, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, xref=3., ext=[AuthorCompanyExt(id=1236348228359221555, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, companyId=1236348228346638641, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=3.CNNC Inner Mongolia Mining Co., Ltd., Hohhot 010020, Inner Mongolia, China), AuthorCompanyExt(id=1236348228380193077, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, companyId=1236348228346638641, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=3.中核内蒙古矿业有限公司,内蒙古 呼和浩特 010020)]), AuthorCompany(id=1236348228526993725, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, xref=4., ext=[AuthorCompanyExt(id=1236348228539576638, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, companyId=1236348228526993725, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=4.Beijing Research Institute of Chemical Engineering and Metallurgy, CNNC, Beijing 101100, China), AuthorCompanyExt(id=1236348228547965248, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, companyId=1236348228526993725, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=4.核工业北京化工冶金研究院,北京 101100)])], figs=[ArticleFig(id=1236348232373170692, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=EN, label=Fig.1, caption=Principle based on iCP coupling platform, figureFileSmall=SJYgisayglkJCU4Pf9b6pQ==, figureFileBig=3i+NU3bM34LZpLxy49NSKg==, tableContent=null), ArticleFig(id=1236348232444473862, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=CN, label=图1, caption=基于iCP耦合平台的原理, figureFileSmall=SJYgisayglkJCU4Pf9b6pQ==, figureFileBig=3i+NU3bM34LZpLxy49NSKg==, tableContent=null), ArticleFig(id=1236348232566108679, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=EN, label=Fig.2, caption=Lithologic distribution map after processing, figureFileSmall=mHd5vMzckeWUV0vk0EKzog==, figureFileBig=WtdD1PH/NPZ4z323ZlkR8w==, tableContent=null), ArticleFig(id=1236348232654189065, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=CN, label=图2, caption=处理后岩性分布图

(a)某XY横截面终了图;(b)岩性三维终了图;(c)某YZ横截面终了图

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(a)抽、注孔;(b)三维非均质模型

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(a)30 m,渗透率;(b)30 m,流线;(c)35 m,渗透率;(d)35 m,流线

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(a)30 m,初始;(b)35 m,初始;(c)30 m,第50 d;(d)35 m,第50 d;(e)30 m,第100 d;(f)35 m,第100 d;(g)30 m,第450 d;(h)35 m,第450 d

, figureFileSmall=qqqVMSDhunjLQLn1n+BYlQ==, figureFileBig=4i5LZqCQLhyK3NvP2iM7Mw==, tableContent=null), ArticleFig(id=1236348233711153693, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=EN, label=Fig.9, caption=Variation of pH in extraction and injection wells on a diagonal cross-section, figureFileSmall=mv41LJPDuVvei9stw9P5tg==, figureFileBig=YXQy9oBPM7YfJWvqB3K/tw==, tableContent=null), ArticleFig(id=1236348233799234079, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=CN, label=图9, caption=斜剖线抽、注孔pH值变化情况

(a)不同水平注液孔;(b)不同水平抽液孔

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(a)30 m,初始;(b)35 m,初始;(c)30 m,第50 d;(d)35 m,第50 d;(e)30 m,第100 d;(f)35 m,第100 d;(g)30 m,第450 d;(h)35 m,第450 d

, figureFileSmall=j78kR5YDDbNu11/FlSZRyA==, figureFileBig=p4+UDTVNz1T2FYMtNhBDgg==, tableContent=null), ArticleFig(id=1236348234248024617, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=EN, label=Fig.12, caption=Variation of uranium concentration in extraction and injection wells, figureFileSmall=xGxZnIrPi4sfsQOXfdkmFA==, figureFileBig=6fQA32rkyLurLGEir2JLew==, tableContent=null), ArticleFig(id=1236348234306744875, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=CN, label=图12, caption=抽、注孔铀浓度变化特征

(a)不同水平注液孔;(b)不同水平抽液孔

, figureFileSmall=xGxZnIrPi4sfsQOXfdkmFA==, figureFileBig=6fQA32rkyLurLGEir2JLew==, tableContent=null), ArticleFig(id=1236348234394825261, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=EN, label=Fig.13, caption=Leaching rate at different level of filter section, figureFileSmall=rfGB5IzNv6AFT0B5bNn4Sg==, figureFileBig=gAn5QWFwiqeQ9PC7WyOsEw==, tableContent=null), ArticleFig(id=1236348234671649326, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=CN, label=图13, caption=不同过滤器段浸出率, figureFileSmall=rfGB5IzNv6AFT0B5bNn4Sg==, figureFileBig=gAn5QWFwiqeQ9PC7WyOsEw==, tableContent=null), ArticleFig(id=1236348234763924016, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=EN, label=Fig.14, caption=Permeability distribution along Y-axis in extraction and injection wells, figureFileSmall=jcg9AhXIx4End/XXi2XFow==, figureFileBig=Eel5IuiL1g5O4t+nAMSx2Q==, tableContent=null), ArticleFig(id=1236348234885558833, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=CN, label=图14, caption=Y轴上抽、注孔渗透率分布(单位:m2

(a)16.30 m注液孔;(b)41.04 m抽液孔

, figureFileSmall=jcg9AhXIx4End/XXi2XFow==, figureFileBig=Eel5IuiL1g5O4t+nAMSx2Q==, tableContent=null), ArticleFig(id=1236348234965250611, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=EN, label=Fig.15, caption=Spatiotemporal characteristics of solute transport and pH on longitudinal section of extraction well at 41.04 m of X-axis, figureFileSmall=XCBg6KwRJpWrQtPT0nv05Q==, figureFileBig=FykT/2wZGcxQoilOmT4p/A==, tableContent=null), ArticleFig(id=1236348235049136693, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=CN, label=图15, caption=X轴41.04 m处抽液孔纵剖面溶质运移与pH值时空变化特征(铀浓度单位:mol/kg)

(a)铀浓度,初始;(b)pH值,初始;(c)铀浓度,第50 d;(d)pH值,第50 d;(e)铀浓度,第100 d;(f)pH值,第100 d;(g)铀浓度,第450 d;(h)pH值,第450 d

, figureFileSmall=XCBg6KwRJpWrQtPT0nv05Q==, figureFileBig=FykT/2wZGcxQoilOmT4p/A==, tableContent=null), ArticleFig(id=1236348235124634167, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=EN, label=Fig.16, caption=Spatiotemporal characteristics of solute transport and pH on longitudinal section of injection well at 16.30 m of X-axis, figureFileSmall=gABDodVfttgxmG0HKGdENA==, figureFileBig=7JmgdVrMdLGOfweEIdWP3Q==, tableContent=null), ArticleFig(id=1236348235191743033, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=CN, label=图16, caption=X轴16.30 m处注液孔纵剖面溶质运移与pH值时空变化特征(铀浓度单位mol/kg)

(a)铀浓度,初始;(b)pH值,初始;(c)铀浓度,第50 d;(d)pH值,第50 d;(e)铀浓度,第100 d;(f)pH值,第100 d;(g)铀浓度,第450 d;(h)pH值,第450 d

, figureFileSmall=gABDodVfttgxmG0HKGdENA==, figureFileBig=7JmgdVrMdLGOfweEIdWP3Q==, tableContent=null), ArticleFig(id=1236348235254657595, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=EN, label=Table 1, caption=

Filter section arrangement

, figureFileSmall=null, figureFileBig=null, tableContent=
过滤器段钻孔X/mY/mZ0/mZ1/m长度/m
KZ850816.37113.6523.4733.4710
KZ890865.86113.7423.7235.7212
KZ9308115.27113.6722.6932.6910
KZ9708164.77113.6928.2736.278
KZ851016.2564.1524.3636.3612
KZ891065.7964.1819.3431.3412
KZ9310115.3264.1927.2737.2710
KZ9710164.7864.1530.1638.168
KZ851216.214.6426.4036.4010
KZ891265.7714.6725.2535.2510
KZ9312115.3314.7028.9136.918
KZ9712164.7814.7229.1637.168
), ArticleFig(id=1236348235338543677, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=CN, label=表1, caption=

过滤器段布置情况

, figureFileSmall=null, figureFileBig=null, tableContent=
过滤器段钻孔X/mY/mZ0/mZ1/m长度/m
KZ850816.37113.6523.4733.4710
KZ890865.86113.7423.7235.7212
KZ9308115.27113.6722.6932.6910
KZ9708164.77113.6928.2736.278
KZ851016.2564.1524.3636.3612
KZ891065.7964.1819.3431.3412
KZ9310115.3264.1927.2737.2710
KZ9710164.7864.1530.1638.168
KZ851216.214.6426.4036.4010
KZ891265.7714.6725.2535.2510
KZ9312115.3314.7028.9136.918
KZ9712164.7814.7229.1637.168
), ArticleFig(id=1236348235405652543, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=EN, label=Table 2, caption=

Parameters of sub-regions in numerical model for mining area C6#

, figureFileSmall=null, figureFileBig=null, tableContent=
区域名称孔隙率渗透系数/(m·d-1扩散系数/(m2·s-1纵向弥散性/m横向弥散性/m
sel10.100.021.8×10-120.200.04
sel20.353.501.8×10-120.200.04
sel30.200.101.8×10-120.500.10
sel40.300.181.8×10-120.500.10
sel50.250.151.8×10-120.500.10
sel60.100.021.8×10-120.200.04
sel70.353.501.8×10-120.200.04
sel80.300.181.8×10-120.500.10
sel90.250.151.8×10-120.500.10
), ArticleFig(id=1236348235472761409, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=CN, label=表2, caption=

C6#采区数值模型各子区域参数

, figureFileSmall=null, figureFileBig=null, tableContent=
区域名称孔隙率渗透系数/(m·d-1扩散系数/(m2·s-1纵向弥散性/m横向弥散性/m
sel10.100.021.8×10-120.200.04
sel20.353.501.8×10-120.200.04
sel30.200.101.8×10-120.500.10
sel40.300.181.8×10-120.500.10
sel50.250.151.8×10-120.500.10
sel60.100.021.8×10-120.200.04
sel70.353.501.8×10-120.200.04
sel80.300.181.8×10-120.500.10
sel90.250.151.8×10-120.500.10
), ArticleFig(id=1236348235535675971, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276106681176178, language=EN, label=Table 3, caption=

Key parameters of leaching solution and underground heterogeneous sub-regions

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PHREEQC文件分类区域名称温度/℃SO42-含量/(mol·kg-1Ca2-含量/(mol·kg-1K+含量/(mol·kg-1Na+含量/(mol·kg-1Cl含量/(mol·kg-1U3O8含量/(mol·m-3
溶浸液化学成分Solution090.108 3
各地下非均质子区域sel194.89×10-31.39×10-31.46×10-42.01×10-21.33×10-20.107
sel294.89×10-31.39×10-31.46×10-42.01×10-21.33×10-20.143
sel394.89×10-31.39×10-31.46×10-42.01×10-21.33×10-20.125
sel494.89×10-31.39×10-31.46×10-42.01×10-21.33×10-20.127
sel594.89×10-31.39×10-31.46×10-42.01×10-21.33×10-20.148
sel694.89×10-31.39×10-31.46×10-42.01×10-21.33×10-20.283
sel794.89×10-31.39×10-31.46×10-42.01×10-21.33×10-20.245
sel894.89×10-31.39×10-31.46×10-42.01×10-21.33×10-20.272
sel994.89×10-31.39×10-31.46×10-42.01×10-21.33×10-20.263
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溶浸液主要参数及地下非均质子区域主要参数

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溶浸液化学成分Solution090.108 3
各地下非均质子区域sel194.89×10-31.39×10-31.46×10-42.01×10-21.33×10-20.107
sel294.89×10-31.39×10-31.46×10-42.01×10-21.33×10-20.143
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sel594.89×10-31.39×10-31.46×10-42.01×10-21.33×10-20.148
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sel794.89×10-31.39×10-31.46×10-42.01×10-21.33×10-20.245
sel894.89×10-31.39×10-31.46×10-42.01×10-21.33×10-20.272
sel994.89×10-31.39×10-31.46×10-42.01×10-21.33×10-20.263
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基于三维非均质模型的地浸过程特征分析与方案优化
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骆桂君 1, 2 , 贾明滔 1, 2 , 张传飞 3 , 阳奕汉 3 , 陈梅芳 4
矿冶工程杂志 | 采矿 2025,45(4): 14-21
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矿冶工程杂志 | 采矿 2025, 45(4): 14-21
基于三维非均质模型的地浸过程特征分析与方案优化
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骆桂君1, 2 , 贾明滔1, 2 , 张传飞3, 阳奕汉3, 陈梅芳4
作者信息
  • 1.中南大学 资源与安全工程学院,湖南 长沙 410083
  • 2.金属资源开发利用碳减排教育部工程研究中心,湖南 长沙 410083
  • 3.中核内蒙古矿业有限公司,内蒙古 呼和浩特 010020
  • 4.核工业北京化工冶金研究院,北京 101100
  • 骆桂君(2000—),女,湖南常德人,硕士研究生,主要研究方向为地浸采铀技术和数值模拟。E-mail:

通讯作者:

贾明滔(1973—),男,河南南阳人,博士,教授,主要从事数字矿山与矿山安全研究。E-mail:
Analysis of In-Situ Leaching Characteristics and Scheme Optimization Based on 3D Heterogeneous Model
Guijun LUO1, 2 , Mingtao JIA1, 2 , Chuanfei ZHANG3, Yihan YANG3, Meifang CHENG4
Affiliations
  • 1.School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China
  • 2.Engineering Research Center for Carbon Emission Reduction in Metal Resource Exploitation and Utilization, Ministry of Education, Changsha 410083, Hunan, China
  • 3.CNNC Inner Mongolia Mining Co., Ltd., Hohhot 010020, Inner Mongolia, China
  • 4.Beijing Research Institute of Chemical Engineering and Metallurgy, CNNC, Beijing 101100, China
出版时间: 2025-08-01 doi: 10.3969/j.issn.0253-6099.2025.04.003
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基于巴彦乌拉铀矿床C6#采区构建三维非均质性数值模型,分析过滤器段不同水平渗透率对溶质运移、pH值、铀矿物浸出性能的影响。模拟结果表明,第450 d过滤器布置段垂直30 m处铀矿浸出率为13.56%,35 m处铀矿浸出率为11.05%,30 m处铀矿浸出率较35 m处铀矿浸出率高出22.71%;根据空间砂岩渗透性、铀矿层品位以及非均质化程度,可以优化过滤器段的垂直布置位置和过滤器段长度,从而有效提高经济可采金属量。

铀矿开采  /  溶浸法  /  酸法采铀  /  非均质化  /  溶质运移  /  COMSOL模型  /  浸出性能  /  地浸

A 3D heterogeneous numerical model was established based on the C6# mining area of the Bayan-Uul uranium deposit to analyze the effects of different horizontal permeability in the filter section on solute transport, pH value and uranium mineral leaching performance. The simulation results show that after 450 days, the uranium leaching rate is 13.56% at the vertical depth of 30 m in the filter section, presenting 22.71% higher compared to the leaching rate of 11.05% at the depth of 35 m. According to the sandstone permeability, grade of uranium in the stratum and heterogeneity, the vertical arrangement position and length of filter section can be optimized, so as to effectively improve the economically recoverable metal quantity.

uranium extraction  /  solution leaching method  /  acid leaching of uranium  /  heterogeneity  /  solute transport  /  COMSOL model  /  leaching performance  /  in-situ leaching
骆桂君, 贾明滔, 张传飞, 阳奕汉, 陈梅芳. 基于三维非均质模型的地浸过程特征分析与方案优化. 矿冶工程杂志, 2025 , 45 (4) : 14 -21 . DOI: 10.3969/j.issn.0253-6099.2025.04.003
Guijun LUO, Mingtao JIA, Chuanfei ZHANG, Yihan YANG, Meifang CHENG. Analysis of In-Situ Leaching Characteristics and Scheme Optimization Based on 3D Heterogeneous Model[J]. Mining and Metallurgical Engineering, 2025 , 45 (4) : 14 -21 . DOI: 10.3969/j.issn.0253-6099.2025.04.003
原位浸出成本低、环境影响小,已成为砂岩铀矿的重要开采方法[1]。其中,酸性浸出是常用方法之一,该过程涉及复杂的水动力学和化学动力学。数值模拟作为常用研究工具,在预测溶浸范围、优化浸出参数(如流速、酸浓度、溶解速率)方面取得显著进展[2-3]。数值模拟也被广泛应用于分析复杂反应传输过程[4-5],如耦合不同软件实现高效模拟,探究渗透性能的影响,以及基于APro框架、iCP平台等进行核素迁移、溶质运移模拟及浸铀过程研究等[6-9]。然而现有模型仍存在不足,一是多物理场(水流场、溶质运移场)与地球化学反应的耦合精度和计算效率有待提升;二是对地层非均质性(孔隙度、渗透率等)及其动态变化的考虑不足,难以准确模拟真实浸出过程。
砂岩铀矿的非均质性(孔隙度、渗透率、铀品位空间变化)对开采效率具有关键影响。近年来在表征非均质性方面的研究取得进展,建模方法从简单模型发展到三维模拟[10-11]。但现有方法主要依赖随机场模拟,面对复杂地质结构时可靠性和确定性可能不足。
针对上述问题,本文基于iCP平台和现场数据,利用有限元法建立高精度三维非均质溶质运移模型;完善酸法浸矿热力学数据库,实现多物理场-化学反应高效耦合;量化分析浸出性能,揭示渗透性、铀品位等非均质性对浸出的影响机制;并提出依据非均质性特征调整过滤器段在垂直位置的布置,以提升开采效益。
巴彦乌拉铀矿床C6#采区位于内蒙古盆地中央低洼地带,地势呈南北高、中部低、北东部略高并向南及南西部缓缓降低的特征,属一级阶状高平原地貌,海拔954~978 m,总体平缓,局部略有波状起伏。
该矿床地层岩性复杂,自上而下为下白垩统赛汉组下段、赛汉组上段及古近系伊尔丁曼哈组。矿区地处马尼特坳陷西部自流水区的径流区,地下水总体从北东向南西缓慢径流,含矿含水层水温在9 ℃左右。水文地质孔分析显示,含矿层地下水中Cl含量411.96~517.60 mg/L,SO42-含量179.82~423.00 mg/L,HCO3含量357.32~512.00 mg/L,Na+含量425.27~516.81 mg/L,Ca2+含量27.09~63.00 mg/L,Mg2+含量19.46~55.00 mg/L。
化学反应速率用于描述化学反应过程中矿物的反应速率与反应物浓度之间的关系,其计算公式[12]为:
式中:RKi为矿物Ki的反应速率,mol/(cm2·s);k1为速率常数,9 ℃下k1=1×10-16 mol/(cm2·s);A为矿物比表面积,m2/g;V为活化体积,cm3/mol;n为指数常数;m为反应物物质的量,mol;m0为反应物初始物质的量,mol;BIAP为离子活度积;K为平衡常数;BIAP/K为相对饱和比。
构建均质多场耦合铀矿酸性浸出数值模型时,首先用有限元法建立COMSOL输入模型,设置几何特性、边界条件、溶浸液流动特性等参数,经网格剖分确定用于浓度计算的网格节点。同时,通过PHREEQC设置溶浸液与矿层水的化学反应参数。模型运行中,浓度数据经节点介质传输至PHREEQC执行化学计算且节点按COMSOL对应化学域分组,计算每个域节点浓度并取算术平均值后,结果回传至COMSOL。本研究基于iCP耦合平台的原理如图1所示。算子分裂法能分离化学反应项与溶质运移项,且适用于高度非线性问题,被广泛用于溶质反应运移求解。该方法在建模中会将溶质运移方程与化学反应方程分离后依次求解[13]
反应性传输步骤使用算子分裂技术和顺序非迭代方法将其分为两部分,以顺序非迭代算法的时间步长为例,计算原理如下。
溶质运移步骤[12]
化学步骤:
更新解决方案:
式中:ω为液相中水的质量分数;u为组分矢量,mol/kg;fw为外部水源,kg/(m3·s);L为线性算子,它考虑了液相的平流、扩散/弥散和非化学汇源项,化学组分被定义为质量不受平衡反应影响的物质的线性组合;vw为内变量,wgwmwawd分别对应于气相、矿物相、水相和吸附相的子组分;c为所有物种的浓度向量,mol/kg;rkin为由动力学反应引起的反应速率向量;t为可以解决非等温的情况;分别是时间nn+1的分量向量。
C6#采区岩性模型依托钻孔数据库采用径向基函数插值方法进行空间反演与构建,将地层依次分为8类,处理后岩性分布如图2所示,处理后岩性匹配度统计如图3所示。采区岩性匹配度达90%以上,可为后期非均质溶质运移模型提供精确化参数依据。
根据图2(b)构建COMSOL数值模型,COMSOL计算模型构建流程如图4所示。
根据岩性以过滤器段内和段外为界限划分了9个不同区域的非均质岩性分布子域,以过滤器段为依据划分为过滤器段外的泥层sel1、粗砂层sel2、细砂层sel3、中砂层sel4、砂层sel5,以及过滤器段内的泥层sel6、粗砂层sel7、中砂层sel8、砂层sel9。模型尺寸为188 m×132 m×86 m,包含C6#采区南部的6个抽注单元。主要涉及的抽、注孔和三维非均质模型如图5所示。
根据地质融合模型,过滤器段布置坐标和长度见表1Z0表示过滤器段靠近底板垂直方向坐标,Z1表示过滤器段靠近顶板垂直方向坐标。砂岩铀矿的地质赋存条件复杂,依托多源地质模型,设计了采区内9个不同子区域的孔隙率、渗透系数、扩散系数、纵向弥散性和横向弥散性,见表2
考虑到地下水复杂赋存状态以及不同子区域铀矿品位非均质性特征,以地质模型为基础,对不同非均质子区域内铀矿品位进行换算,PHREEQC子区域参数设置见表3,计算如下:
式中:ni为子区域铀矿物质的量,mol;Mi为对应计算子区域内的铀矿物质量,g;m为铀矿物的相对分子质量。
模拟非均质情况下砂岩铀矿的浸出情况,对耦合模型边界进行定义,溶浸液以0.2 kg/(m·s)的单位长度质量流率注入过滤器所在含矿层,并以0.5 kg/(m·s)的单位长度质量流率从抽液孔抽出。地下水自北东向西南缓慢流动,北东设置压力水头60 m,西南设置压力水头50 m,地下水达西流速为8.311 3 m/s。C6#采区参照450 d实际浸出率变化情况开展模拟实验,确定物理模拟时长为450 d。
图6为过滤器布置段垂直30 m和35 m处横剖面截水平渗透率与流线分布图。图7为斜剖面抽、注孔的压力水头变化情况。渗透率云图由深色过渡至亮色,表明岩层渗透性由极好变为较差。
地下水流场自左向右从流入到流出,在单元1至单元5的斜剖面所在单元中,35 m水平的渗透率整体较30 m水平差。两个水平的溶质运移均呈现溶浸液从注入孔向抽出孔流动的状态。由于这2个水平的高渗透性岩层主要分布在单元1、单元4和单元6,这3个区域的流线分布较为密集,溶浸液通道丰富。而在极差岩层集中的区域,如30 m水平的单元2、单元5以及35 m水平的单元2、单元3和单元5,流线通道则相对稀疏。
在浸出过程中,随着液体的持续注入,渗透压会不断变化[14]。根据文献[15-16]对较大、较小抽注压差在铀矿浸出的研究可知,较低的压差通常意味着在注入孔开始注入之前,液体的流动受到了限制,这可能导致浸出剂无法有效渗透到矿物质中,降低了浸出速率;较高的压差则可促进液体的快速流动,使浸出剂在矿物中更快地扩散。这种情况下,矿物质与浸出剂的接触时间增加,反应更加充分,从而提高了浸出速率;在特定的地质条件下,注入孔的深度和位置也会影响压差的大小和流体流动的方向。在“巢状矿体”中,适当深度的注入孔用于控制浸出剂的流速和流向,有助于优化浸出过程。因此,对于渗透率分布较为均匀的抽、注孔,考虑到抽、注孔附近渗透性对压差的影响,压差可能较小,其流量分布也会比较均匀,可能会影响前期浸出率;对于渗透率分布差距较大的区域,压差可能较大,其流量分布也会比较不均匀,可能会提高前期浸出率。但不是渗透率越好,流量就会越集中往抽液井流出,因为外围渗透率可能强于抽液孔,此时溶浸液会往外围扩散或弥散,从而造成浸出效果没有均匀分布区好的情况,这与地下水流场抽、注孔压力水头影响有关。
过滤器段不同水平pH值时空变化特征如图8所示,斜剖面抽、注孔pH值变化情况如图9所示,不同水平平均pH值随着时间变化特征如图10所示。
30 m水平矿层整体pH值平均值高于35 m水平,可见整体浸出环境30 m水平优于35 m水平。随着溶浸液逐渐从注入孔注入含矿层,单元内呈现pH值由注液孔往抽液孔方向升高的趋势。结合图6,对过滤器段不同水平分析显示,渗透率均匀的区域(如30 m水平抽注单元1)前期pH值变化缓慢,溶质运移稳定;渗透率分布极端的区域(如30 m和35 m水平抽注单元3、6)因渗透性剧烈变化导致地下压差大,前期pH值空间变化急速,溶质运移强烈。模拟至450 d时,30 m水平的强酸范围大于35 m水平。
图11为过滤器段不同水平剩余铀量的时空变化规律。取抽注单元1到抽注单元5斜剖线为研究目标,分析非均质条件下抽、注孔铀浓度变化规律。由图11可知,在溶浸范围内,30 m水平的抽注单元3、4、6最先形成扇形溶浸区;35 m水平则是单元3最先形成扇形溶浸区。这是由于这些区域存在渗透率梯度变化,能提供较大渗流压差,从而促进地下水流动,与前文pH值变化与渗透率相关的分析结论一致。
斜剖线上不同平面抽液孔、注液孔铀浓度变化情况如图12所示。由图12可知,注液孔周围铀矿溶浸分为3个过程,每个注孔周围矿物浸出阶段时间分布情况不一,这受到pH值、地下水流动方向、矿层渗透性等多种因素的影响。据文献[10]对铀反应运移模拟的分析,对流和弥散作用使上游和中游地下水中的铀浓度逐渐降低,而在下游地下水中则导致溶解铀聚集。这与前文分析的情况一致,说明岩层渗透性和岩层非均质程度共同影响铀矿的浸出效果。
不同过滤器段浸出率如图13所示。前450 d,30 m水平所模拟的砂岩铀矿浸出率为13.56%,35 m水平铀矿浸出率为11.05%,30 m水平铀矿浸出率较35 m水平铀矿浸出率高出22.71%,过滤器布置存在最优位置,应根据空间砂岩渗透性动态布置过滤器段垂直位置,以提高经济可采金属量。
图14Y轴16.30 m和41.04 m处抽液孔和注液孔纵剖面渗透率的分布情况。剖面上注液孔和抽液孔渗透率分布较集中,主要为极好、好和一般的渗透率,整体表现为左边的渗透率高于右边的渗透率,下方的渗透率高于上方的渗透率。
砂岩铀矿地下溶质运移受多种因素的影响,分析YZ平面纵剖面上X轴16.30 m处和41.04 m处的第0、50、100和450 d砂岩铀矿浸出变化情况和pH值变化情况。图15为抽液孔KC8708和KC8710的溶质运移和pH值时空变化特征,图16为注液孔KZ8508、KZ8510和KZ8512的溶质运移和pH值时空变化特征。由图15图16可见,抽液孔流线通道分布较为集中的区域是左下方和右下方区域,注液孔的流线通道分布较为均匀,明显集中在中间部分和右下方区域,这和渗透率的分布情况契合。
分析可知,pH值的变化对溶质的扩散速率和溶质对土壤颗粒的吸附能力都有影响,这与文献[17]的研究结论契合,pH值较高时,溶质渗透性可能会降低,从而减缓溶质在介质中的移动。抽液孔右下角溶质运移情况不明显,可能与pH值升高有关,当pH值发生变化时,吸附的溶质可能会被解吸回溶液中[18]。这一过程与溶质的化学性质、介质的特性以及环境条件密切相关[19],pH值升高时,某些金属离子可能会从固体相解吸,导致其他离子在水体中的浓度增加,铀矿物浸出减少,铀离子浓度降低。
1)过滤器段垂直方向的不同水平中,砂岩铀矿非均质性对浸出率影响显著,整体表现为渗透性强的矿层浸出率更高。
2)不同抽注单元内,渗透率空间分布均匀度极大影响开采前期浸出效果,这主要与抽、注孔压力水头相关。含矿层渗透率分布越均匀,抽注压差越小,前期溶质运移越缓,流场越稳定;渗透率阶梯跨度大的区域,抽注压差大,溶质运移强烈,流场呈局部集中。
3)抽、注孔周围渗透率和地下水流动方向对铀浓度影响显著,同一溶浸水平下,上游区域铀浓度通常低于下游。
4)纵向空间内,注液孔比抽液孔先发生矿物浸出,且溶质运移通道分布与pH值变化密切相关,通道密集程度与渗透率分布一致。由此可见,渗透率存在最优范围,单个注孔过滤器段也存在最优布置位置和长度。未来可结合空间砂岩渗透性、铀矿层品位及非均质化程度,重点研究过滤器段垂直布置位置与长度的优化措施,以实现高效开采。
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2025年第45卷第4期
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doi: 10.3969/j.issn.0253-6099.2025.04.003
  • 接收时间:2025-02-24
  • 首发时间:2026-03-05
  • 出版时间:2025-08-01
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  • 收稿日期:2025-02-24
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国家自然科学基金重点项目(52034001)
作者信息
    1.中南大学 资源与安全工程学院,湖南 长沙 410083
    2.金属资源开发利用碳减排教育部工程研究中心,湖南 长沙 410083
    3.中核内蒙古矿业有限公司,内蒙古 呼和浩特 010020
    4.核工业北京化工冶金研究院,北京 101100

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贾明滔(1973—),男,河南南阳人,博士,教授,主要从事数字矿山与矿山安全研究。E-mail:
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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