地浸采铀钻孔过滤器对溶液渗流影响的数值模拟
|
摘要
为提高矿体薄、矿砂比小的砂岩型铀矿地浸溶液工作效率,采用数值模拟方法对钻孔过滤器影响溶液在矿层和围岩的流量分布进行了计算,以优化钻孔结构。结果表明,钻孔过滤器向围岩延伸方向及长度,是影响地浸溶液渗流分布的重要因素;采用抽、注孔过滤器分别自矿层向下围岩和上围岩延伸的结构,可以有效增加溶浸液流经矿层的比例;过滤器延伸长度以2～3 m为宜,处于高位的注液孔过滤器延伸长度可略小于低位注液孔,有利于不同方向的均衡浸出。
In order to improve the working efficiency of the leaching solution of the sandstone-type uranium deposit with thin ore body and small ore ratio during in-situ leaching, the flow distribution of the influence of the drilling filter on the ore and surrounding rock is calculated by numerical simulation method to optimize the distribution of the borehole. The results show that the direction and length of the drilling filter to the surrounding rock is an important factor affecting the seepage distribution of the in-situ solution. The prolonging the length of drilling filter from ore bodies into wall rock would effectively increase the proportion of the leaching solution flowing through the ore layer. However, the prolonging length of the filter is preferably 2～3 m, and the injection drilling filter at a high position may be slightly shorter than the low-level injection ones, which conducive to balanced leaching in different directions.
In order to improve the working efficiency of the leaching solution of the sandstone-type uranium deposit with thin ore body and small ore ratio during in-situ leaching, the flow distribution of the influence of the drilling filter on the ore and surrounding rock is calculated by numerical simulation method to optimize the distribution of the borehole. The results show that the direction and length of the drilling filter to the surrounding rock is an important factor affecting the seepage distribution of the in-situ solution. The prolonging the length of drilling filter from ore bodies into wall rock would effectively increase the proportion of the leaching solution flowing through the ore layer. However, the prolonging length of the filter is preferably 2～3 m, and the injection drilling filter at a high position may be slightly shorter than the low-level injection ones, which conducive to balanced leaching in different directions.
引文
程宗芳. 2003. 地浸工艺钻孔施工中的技术[J].铀矿冶,22(2):61-64.
胡凯光,张磊,何智,等. 2017. 基于GMS某地浸铀矿地浸液中铀的吸附模拟[J].矿山工程,5(3):23-31.
吉宏斌,黄群英,周义朋,等. 2017. 抽注流量分配及抽注比对地浸溶液扩散的影响[J].铀矿冶,36(3):172-181.
焦友军,施小清,吴吉春,等. 2015. 基于PHT3D的地下水中六价铀吸附反应运移数值模拟[J].地下水,37(2):8-10.
利广杰,王海峰,张勇,等. 2011. 基于Visual MODFLOW的地下水数值模拟在地浸采铀中的应用[J].铀矿冶,30(1):1-5.
吕俊文,周星火,蔡萍莉,等. 2003. 某铀矿地浸采区的水动力场三维模拟[J].铀矿冶,22(4):188-192.
庞国兴,李金轩,杨强, 等. 2009. Visual Modflow在甘肃某矿区地下水数值模拟中的应用[J].东华理工大学学报:自然科学版,32(4):307-312.
谭凯旋,王清良,胡鄂明,等. 2005. 原地溶浸开采中的多过程耦合作用与反应前锋运动:2.数值模拟[J].铀矿冶,24(2):57-61.
谭凯旋,周泉宇,吕俊文,等. 2007. 地浸采铀矿区地下水中UO■和SO■迁移的数值模拟[J].矿物学报, 27(增刊):394-395.
谢廷婷,王晓东,谭亚辉,等. 2015. 帷幕注水地浸采铀三维地下水流数值模拟[J].铀矿冶,34(2):91-96.
徐海珍,高艳丽,李国敏,等. 2013. 地下水中酸性污染羽的自然净化作用数值模拟研究[J].工程地质学报,21(6):926-931.
薛禹群. 2010. 中国地下水数值模拟的现状与展望[J].高校地质学报,16(1):1-6.
姚益轩,侯树仁,谢廷婷,等. 2015. 塔木素铀矿床含矿层地下水储集和渗流类型分析[J].东华理工大学学报:自然科学版,38(4):344-349.
曾晟,谭凯旋,桑潇等. 2011. 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,45(4):500-505.
张建华,朱新铖,史骥. 2017. 某原地浸出铀矿井型及井距优化数值模拟[J].金属矿山, (3):25-30.
张勇,马连春,张渤,等. 2017. 低渗透性铀矿床浸出过程对地下水环境影响的探讨[J].铀矿冶,36(增刊):75-86.
赵春虎,李国敏,雷奇峰,等. 2008. 某可地浸砂岩型铀矿区地下水水流三维数值模拟[J].铀矿地质,24(4):228-232.
赵贺永,肖月华. 2015. 某铀矿原地浸出U离子的GMS模拟研究[J].攀枝花学院学报,32(2):22-24.
赵贺永. 2015. 某铀矿原地浸出的GMS模拟研究[J].西安文理学院学报:自然科学版,18(2):88-91.
周义朋,沈照理,孙占学,等. 2012. 某砂岩型铀矿地浸采铀试验溶浸液化学组分运移模拟[J].中国矿业,21(增刊):298-300.
周义朋,沈照理,孙占学,等. 2013. 地浸采铀抽注平衡关系对溶浸液流失与地下水流入的影响[J]. 有色金属(矿山部分),65(4):1-4.
周义朋,沈照理,孙占学,等. 2015. 应用粒子示踪模拟技术确定地浸采铀溶浸范围[J].中国矿业,24(2):117-120.
Bain J G, Mayer K U, Blowes D W, et al. 2001. Modelling the closure-related geochemical evolution of groundwater at a former uranium mine[J]. Journal of Contaminant Hydrology,52(1):109-135.
Gómez P, Garralón A, Buil B, et al. 2006. Modeling of geochemical processes related to uranium mobilization in the groundwater of a uranium mine[J]. Science of the Total Environment,366(1):295-309.
Wen H, Pan Z, Giammar D E, et al. 2018. Enhanced Uranium Immobilization by Phosphate Amendment Under Variable Geochemical and Flow Conditions: Insights from Reactive Transport Modeling.[J]. Environmental Science & Technology,52(10):5841-5850.
Zhou Y, Shen Z, Shi W, et al. 2013. A Method for Setting the Artificial Boundary Conditions of Groundwater Model[J]. Open Journal of Geology,3(2):50-54.
胡凯光,张磊,何智,等. 2017. 基于GMS某地浸铀矿地浸液中铀的吸附模拟[J].矿山工程,5(3):23-31.
吉宏斌,黄群英,周义朋,等. 2017. 抽注流量分配及抽注比对地浸溶液扩散的影响[J].铀矿冶,36(3):172-181.
焦友军,施小清,吴吉春,等. 2015. 基于PHT3D的地下水中六价铀吸附反应运移数值模拟[J].地下水,37(2):8-10.
利广杰,王海峰,张勇,等. 2011. 基于Visual MODFLOW的地下水数值模拟在地浸采铀中的应用[J].铀矿冶,30(1):1-5.
吕俊文,周星火,蔡萍莉,等. 2003. 某铀矿地浸采区的水动力场三维模拟[J].铀矿冶,22(4):188-192.
庞国兴,李金轩,杨强, 等. 2009. Visual Modflow在甘肃某矿区地下水数值模拟中的应用[J].东华理工大学学报:自然科学版,32(4):307-312.
谭凯旋,王清良,胡鄂明,等. 2005. 原地溶浸开采中的多过程耦合作用与反应前锋运动:2.数值模拟[J].铀矿冶,24(2):57-61.
谭凯旋,周泉宇,吕俊文,等. 2007. 地浸采铀矿区地下水中UO■和SO■迁移的数值模拟[J].矿物学报, 27(增刊):394-395.
谢廷婷,王晓东,谭亚辉,等. 2015. 帷幕注水地浸采铀三维地下水流数值模拟[J].铀矿冶,34(2):91-96.
徐海珍,高艳丽,李国敏,等. 2013. 地下水中酸性污染羽的自然净化作用数值模拟研究[J].工程地质学报,21(6):926-931.
薛禹群. 2010. 中国地下水数值模拟的现状与展望[J].高校地质学报,16(1):1-6.
姚益轩,侯树仁,谢廷婷,等. 2015. 塔木素铀矿床含矿层地下水储集和渗流类型分析[J].东华理工大学学报:自然科学版,38(4):344-349.
曾晟,谭凯旋,桑潇等. 2011. 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,45(4):500-505.
张建华,朱新铖,史骥. 2017. 某原地浸出铀矿井型及井距优化数值模拟[J].金属矿山, (3):25-30.
张勇,马连春,张渤,等. 2017. 低渗透性铀矿床浸出过程对地下水环境影响的探讨[J].铀矿冶,36(增刊):75-86.
赵春虎,李国敏,雷奇峰,等. 2008. 某可地浸砂岩型铀矿区地下水水流三维数值模拟[J].铀矿地质,24(4):228-232.
赵贺永,肖月华. 2015. 某铀矿原地浸出U离子的GMS模拟研究[J].攀枝花学院学报,32(2):22-24.
赵贺永. 2015. 某铀矿原地浸出的GMS模拟研究[J].西安文理学院学报:自然科学版,18(2):88-91.
周义朋,沈照理,孙占学,等. 2012. 某砂岩型铀矿地浸采铀试验溶浸液化学组分运移模拟[J].中国矿业,21(增刊):298-300.
周义朋,沈照理,孙占学,等. 2013. 地浸采铀抽注平衡关系对溶浸液流失与地下水流入的影响[J]. 有色金属(矿山部分),65(4):1-4.
周义朋,沈照理,孙占学,等. 2015. 应用粒子示踪模拟技术确定地浸采铀溶浸范围[J].中国矿业,24(2):117-120.
Bain J G, Mayer K U, Blowes D W, et al. 2001. Modelling the closure-related geochemical evolution of groundwater at a former uranium mine[J]. Journal of Contaminant Hydrology,52(1):109-135.
Gómez P, Garralón A, Buil B, et al. 2006. Modeling of geochemical processes related to uranium mobilization in the groundwater of a uranium mine[J]. Science of the Total Environment,366(1):295-309.
Wen H, Pan Z, Giammar D E, et al. 2018. Enhanced Uranium Immobilization by Phosphate Amendment Under Variable Geochemical and Flow Conditions: Insights from Reactive Transport Modeling.[J]. Environmental Science & Technology,52(10):5841-5850.
Zhou Y, Shen Z, Shi W, et al. 2013. A Method for Setting the Artificial Boundary Conditions of Groundwater Model[J]. Open Journal of Geology,3(2):50-54.