原地浸出采铀多场多过程耦合动力学数值模拟

曾晟, 谭凯旋, 桑潇, 史文革

曾晟, 谭凯旋, 桑潇, 史文革. 原地浸出采铀多场多过程耦合动力学数值模拟[J]. 原子能科学技术, 2011, 45(4): 500-505. DOI: 10.7538/yzk.2011.45.04.0500
引用本文: 曾晟, 谭凯旋, 桑潇, 史文革. 原地浸出采铀多场多过程耦合动力学数值模拟[J]. 原子能科学技术, 2011, 45(4): 500-505. DOI: 10.7538/yzk.2011.45.04.0500
ZENG Sheng, TAN Kai-xuan, SANG Xiao, SHI Wen-ge. Numerical Simulation on Multi-field and Multi-process Coupling Dynamics of In-situ Leaching of Uranium[J]. Atomic Energy Science and Technology, 2011, 45(4): 500-505. DOI: 10.7538/yzk.2011.45.04.0500
Citation: ZENG Sheng, TAN Kai-xuan, SANG Xiao, SHI Wen-ge. Numerical Simulation on Multi-field and Multi-process Coupling Dynamics of In-situ Leaching of Uranium[J]. Atomic Energy Science and Technology, 2011, 45(4): 500-505. DOI: 10.7538/yzk.2011.45.04.0500

原地浸出采铀多场多过程耦合动力学数值模拟

Numerical Simulation on Multi-field and Multi-process Coupling Dynamics of In-situ Leaching of Uranium

  • 摘要: 原地浸出采铀是一复杂的非线性动力系统,涉及诸多因素与过程的耦合和正负反馈作用。为研究地浸采铀过程中岩石结构力学及其演化规律、岩石变形作用、孔隙度与渗透率的动力演化等对浸出效果的影响,建立了一多因素、多过程耦合的综合动力学模型和模拟方法,并基于Fortran与C++语言编制了1~3维模拟程序。通过对某地浸铀矿床某采区酸化、生产、溶浸末期各阶段的数值模拟,得到各生产时期矿岩中铀的浓度分布,该采区酸化40 d后浸出液中铀浓度增加到15 mg/L,以及该采区铀5 a后基本浸出完毕;在生产末期,浸出液中的铀、酸浓度下降明显,采场区域铀浓度降低到10 mg/L,pH升至2左右。数值模拟结果与矿山实际生产情况基本吻合。该模型和程序可应用于地浸采铀的理论研究、矿山设计、生产管理和地下水污染物迁移与复原研究。

     

    Abstract: Insitu leaching of uranium is a very complicated non-linear dynamic system, involving the couplings among various factors and processes and the positive and negative feedback actions. In order to study the influences of rock structural mechanics and its evolution law, rock deformation, the dynamic evolution of porosity and permeability on leaching effect, a coupling model and simulation method were founded among multivariate and multi-process leaching kinetics, and a 3-D simulation program was compiled based on Fortran and C++. Through the numerical simulation of the leaching process in acidification, production and terminal stages, the distribution of uranium concentration in various production stages was obtained, uranium concentration in groundwater of the leaching area increases to 15 mg/L after 40 d acidification; the uranium in this area is completely leached after 5 years production; and the concentrations of uranium and acid obviously decrease in the end stage, with the concentration of uranium decreasing to 10 mg/L and the pH approaching around 2.0. The numerical analysis results coincide with practical production. And the model and program can be applied in theoretical study, engineering design, production management, and the study of groundwater contaminant transport and restoration for in-situ leaching of uranium.

     

  • [1] 王海峰,武伟,汤庆四,等. 两孔酸法地浸采铀现场试验[J]. 中国矿业,2005,14(8):72-75.
    WANG Haifeng, WU Wei, TANG Qingsi, et al. The twowell field test for acid in-situ leaching of uranium[J]. China Mining Magazine, 2005, 14(8): 72-75(in Chinese).
    [2] 李开文. 论我国地浸采铀技术的重大突破——新疆地浸采铀矿床的成功应用[J]. 中国矿业,2005,14(3):1-8.
    LI Kaiwen. The great breakthrough of in-situ leaching uranium exploitation technique in China—The successful utilization of insitu leaching uranium exploitation deposit[J]. China Mining Magazine, 2005, 14(3): 1-8(in Chinese).
    [3] IAEA. Recent developments in uranium resources and production with emphasis on in situ leach mining, IAEA-TECDOC-1396[R]. Vienna: IAEA, 2004.
    [4] 吴爱祥,王洪江,杨保华,等. 溶浸采矿技术的进展与展望[J]. 采矿技术,2006,6(3):3-12.
    WU Aixiang, WANG Hongjiang, YANG Baohua, et al. Study of leaching mining technology progress and prospect[J]. Mining Technology, 2006, 6(3): 3-12(in Chinese).
    [5] 王海峰,阙为明,钟平汝,等. 原地浸出采铀技术与实践[M]. 北京:原子能出版社,1998.
    [6] 谭凯旋,王清良,胡鄂明,等. 原地溶浸采矿中的多过程耦合作用与反应前锋运动:1.理论分析[J]. 铀矿冶,2005,24(1):14-18.
    TAN Kaixuan, WANG Qingliang, HU Eming, et al. Multiple processes coupling and reaction front propagation during in-situ leachmining: 1. Theoretical analyses[J]. Uranium Mining and Metallurgy, 2005, 24(1): 14-18(in Chinese).
    [7] TAN Kaixuan, WANG Qingliang, LIU Zehua, et al. Nonlinear dynamics of flowreaction coupling in porous media and application to in-situ leaching uranium mining[J]. International Journal of Modern Physics B, 2004, 18(17-19): 2 663-2 668.
    [8] 谭凯旋,谢焱石,周泉宇,等. 地球化学和成矿体系自组织[M]. 哈尔滨:哈尔滨工程大学出版社,2009.
    [9] BERRYMAN J G. Long-wavelength propagation in composite elastic media: Ⅰ. Spherical inclusions [J]. J Acoust Soc Am, 1980, 68, 1 809-1 819.
    [10] BERRYMAN J G. Effective medium approximation for elastic constants of porous solids with microscopic heterogeneity [J]. J Appl Phys, 1986, 59: 1 136-1 140.
    [11] ORTOLEVA P, MERINO E, MOORE C, et al. Geochemical self-organization: Ⅰ. Reaction transport feedbacks and modeling approach[J]. Am J Sci, 1987, 287: 979-1 007.
    [12] TUNCAY K, KHALIL A, PETER J, et al. Failure, memory, and cyclic fault movement [J]. Bulletin of the Seismological Society of America, 2001, 91(3): 538-552.
    [13] 谭凯旋,王清良,伍衡山,等. 溶浸采矿热力学和动力学[M]. 长沙:中南大学出版社,2003.
    [14] 胡霭琴,王中刚,涂光炽. 新疆北部地质演化及成岩成矿规律[M]. 北京:科学出版社,1997.
    [15] 陈崇希,唐仲华. 地下水流动问题数值方法[M]. 武汉:中国地质大学出版社,2002.
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出版历程
  • 收稿日期:  1899-12-31
  • 修回日期:  1899-12-31
  • 刊出日期:  2011-04-19

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