溶浸作用下稀土矿力学弱化规律研究
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摘要
为探寻不同浸矿时间下稀土矿强度弱化规律,借助自制的模拟浸矿装置,对不同浸矿时间后的矿样进行直剪试验,探讨溶浸液对矿体强度的作用规律,揭示浸矿时间对黏聚力和内摩擦角的影响机制。研究结果表明:不同浸矿时间后的稀土矿对应着不同的剪切强度,并存在剪应力峰值,在相同正应力条件下,矿块剪应力峰值与浸矿时间呈负相关变化,并分别建立了浸矿时间与黏聚力和内摩擦角的关系模型;随着浸矿时间增长,稀土矿在溶浸液的渗流和应力耦合因素的作用下,改变了矿体空间结构,减弱了矿物间的黏结强度,致使矿体抗剪强度弱化。
In order to explore the strength weakening characteristics of rare earth ore during different leaching time, with the aid of self-made simulated leaching device, the direct shear test was carried out on the ore samples after different leaching time, and the effect of leaching solution on the strength of ore body was discussed, and the mechanism of influence of leaching time on cohesive force and internal friction angle was revealed. The results show that the rare earth ore after different leaching time corresponds to different shear strength, and there is a peak shear stress. Under the same normal stress conditions, the peak shear stress of the ore block is negatively correlated with the leaching time, and the relationship model of the leaching time with the cohesive force and the internal friction angle is established respectively.With the increase of the leaching time, the mineral space structure is changed and the bond strength between minerals is weakened and the shear strength of the ore body is weakened by the effect of the coupling factors such as percolation and stress of the leaching solution.
In order to explore the strength weakening characteristics of rare earth ore during different leaching time, with the aid of self-made simulated leaching device, the direct shear test was carried out on the ore samples after different leaching time, and the effect of leaching solution on the strength of ore body was discussed, and the mechanism of influence of leaching time on cohesive force and internal friction angle was revealed. The results show that the rare earth ore after different leaching time corresponds to different shear strength, and there is a peak shear stress. Under the same normal stress conditions, the peak shear stress of the ore block is negatively correlated with the leaching time, and the relationship model of the leaching time with the cohesive force and the internal friction angle is established respectively.With the increase of the leaching time, the mineral space structure is changed and the bond strength between minerals is weakened and the shear strength of the ore body is weakened by the effect of the coupling factors such as percolation and stress of the leaching solution.
引文
[1]肖燕飞,黄小卫,冯宗玉,等.离子吸附型稀土矿绿色提取技术研究进展[J].稀土,2015,36(3):109-115.XIAO Yanfei,HUANG Xiaowei,FENG Zongyu,et al.Progress in the green extraction technology for rare earth from ion-adsorption type rare earths ore[J].Chinese Rare Earths,2015,36(3):109-115.
[2]CHI R A,TIAN J,LI Z J,et al.Existing state and partitioning of rare earth on weathered ores[J].Journal of Rare Earths,2005,23(6):756-759.
[3]MOLDOVEANU G A,PAPANGELAKIS V G.An overview of rare-earth recovery by ion-exchange leaching from ion-adsorption clays of various origins[J].Mineralogical Magazine,2016,80(1):63-76.
[4]LIU S W,LIU X D,FAN X L,et al.Effects of ion-absorbed rare earth deposits mining on the hydrochemical environment in ore districts and its vicinity a case study of Longnan rare earth mine,Jiangxi province,south China[J].Advanced Materials Research,2014,955/956/957/958/959:343-347.
[5]王小玲.浸矿对离子型稀土矿体结构影响的试验研究及其应用[D].南昌:江西理工大学资源与环境工程学院,2015:6-21.WANG Xiaoling.Experimental study on ore body structure of ion-adsorption type rare-earths in leaching and its applications[D].Nanchang:Jiangxi University of Science and Technology.School of Resources and Environmental Engineering,2015:6-21.
[6]范飞鹏,肖惠良,陈乐柱,等.赣南陂头一带风化壳淋积型稀土矿成矿地质特征[J].中国稀土学报,2014,32(1):101-107.FAN Feipeng,XIAO Huiliang,CHEN Lezhu,et al.Mineralization and geological characteristics of elutiondeposited rare earth ore from weathering crust in Pitou region,southern Ganzhou[J].Chinese Journal of Rare Earth Sciences,2014,32(1):101-107.
[7]邬长福,姚贵佳,陈亮,等.基于Geo-Studio的离子型稀土矿边坡稳定性分析[J].中国地质灾害与防治学报,2016,27(2):72-77.WU Changfu,YAO Guijia,CHEN Liang,et al.Slope stability analysis for a ionic rare earth mine in-situ leaching based on Geo-Studio[J].The Chinese Journal of Geological Hazard and Control,2016,27(2):72-77.
[8]王洪丁,王观石,邱高磊,等.离子型稀土矿体强度特性试验研究[J].中国矿业,2016,25(9):136-140.WANG Hongding,WANG Guanshi,QIU Gaolei,et al.Research into strength characteristics for ion-adsorption rare earth ore[J].China Mining Magazine,2016,25(9):136-140.
[9]罗嗣海,黄健,王观石,等.寻乌离子型稀土矿体抗剪强度特性试验研究[J].科学技术与工程,2017,17(23):266-271.LUO Sihai,HUANG Jian,WANG Guanshi,et al.Experimental study on the characteristics of shear strength of Xunwu’s ion-type rare earth ore bodies[J].Science and Technology and Engineering,2017,17(23):266-271.
[10]尹升华,齐炎,谢芳芳,等.不同孔隙比下风化壳淋积型稀土矿强度特性[J].工程科学学报,2018,40(2):159-166.YIN Shenghua,QI Yan,XIE Fangfang,et al.Strength characteristics of weathered crust elution-deposited rare earth with different porosity ratio[J].Engineering Science Journal,2018,40(2):159-166.
[11]罗嗣海,袁磊,王观石,等.浸矿对离子型稀土矿强度影响的试验研究[J].有色金属科学与工程,2013,4(3):58-61.LUO Sihai,YUAN Lei,WANG Guanshi,et al.The effect of leaching on the strength of ion-adsorption rare-earth ore[J].Nonferrous Metals Science&Engineering,2013,4(3):58-61.
[12]姚康,罗嗣海,胡世丽,等.离子型稀土矿山临界注液强度的计算[J].有色金属科学与工程,2018,9(1):98-104.YAO Kang,LUO Sihai,HU Shili,et al.Calculation of critical liquid injection intensity for ion-absorbed rare earth mines[J].Nonferrous Metals Science and engineering,2018,9(1):98-104.
[13]王晓军,卓毓龙,邓书强,等.化学置换过程中稀土矿强度特性演化规律试验研究[J].江西理工大学学报,2016,37(3):56-60.WANG Xiaojun,ZHUO Yulong,DENG Shuqiang,et al.Experimental study on the evolution law of the strength characteristics of REO in displacement reaction[J].Journal of Jiangxi University of Science and Technology,2016,37(3):56-60.
[14]饶睿,李明才,张树标,等.离子型稀土原地浸矿采场滑坡特征及防控试验研究[J].稀土,2016,37(6):26-31.RAO Rui,LI Mingcai,ZHANG Shubiao,et al.Experimental study on landslide features and countermeasures of in-situ leaching stope of ion-type rare earth mines.[J]Chinese Rare Earths,2016,37(6):26-31.
[15]李永欣,王晓军,黄广黎,等.离子型稀土浸矿过程渗透率与黏聚力的关系研究[J].矿业研究与开发,2018,38(1):24-27.LI Yongxin,WANG Xiaojun,HUANG Guangli,et al.Research on the relation of permeability and cohesion in the leaching process of ion-type rare earth ore[J].Mining Research&Development,2018,38(1):24-27.
[16]LIN B,CERATO A B.Hysteretic shear strength and shear-induced volume change of natural expansive soils weathered from shale[C]//Geo-Congress 2014:Geo-characterization and Modeling for Sustainability.Atlanta,USA,2014:1347-1356.
[17]XIAO Jie,YANG Heping,ZHANG Junhui,et al.Surficial failure of expansive soil cutting slope and its flexible support treatment technology[J].Advances in Civil Engineering,2018,2018:1-13.
[18]XIAO Yanfei,LAI Fuguo,HUANG Li,et al.Reduction leaching of rare earth from ion-adsorption type rare earths ore:II.compound leaching[J].Hydrometallurgy,2017,173:1-8.
[19]郭钟群,金解放,赵奎,等.离子吸附型稀土开采工艺与理论研究现状[J].稀土,2018,39(1):132-141.GUO Zhongqun,JIN Jiefang,ZHAO Kui,et al.Status of leaching technology and theory of ion adsorption type rare earth ores[J].Rare Earth,2018,39(1):132-141.
[2]CHI R A,TIAN J,LI Z J,et al.Existing state and partitioning of rare earth on weathered ores[J].Journal of Rare Earths,2005,23(6):756-759.
[3]MOLDOVEANU G A,PAPANGELAKIS V G.An overview of rare-earth recovery by ion-exchange leaching from ion-adsorption clays of various origins[J].Mineralogical Magazine,2016,80(1):63-76.
[4]LIU S W,LIU X D,FAN X L,et al.Effects of ion-absorbed rare earth deposits mining on the hydrochemical environment in ore districts and its vicinity a case study of Longnan rare earth mine,Jiangxi province,south China[J].Advanced Materials Research,2014,955/956/957/958/959:343-347.
[5]王小玲.浸矿对离子型稀土矿体结构影响的试验研究及其应用[D].南昌:江西理工大学资源与环境工程学院,2015:6-21.WANG Xiaoling.Experimental study on ore body structure of ion-adsorption type rare-earths in leaching and its applications[D].Nanchang:Jiangxi University of Science and Technology.School of Resources and Environmental Engineering,2015:6-21.
[6]范飞鹏,肖惠良,陈乐柱,等.赣南陂头一带风化壳淋积型稀土矿成矿地质特征[J].中国稀土学报,2014,32(1):101-107.FAN Feipeng,XIAO Huiliang,CHEN Lezhu,et al.Mineralization and geological characteristics of elutiondeposited rare earth ore from weathering crust in Pitou region,southern Ganzhou[J].Chinese Journal of Rare Earth Sciences,2014,32(1):101-107.
[7]邬长福,姚贵佳,陈亮,等.基于Geo-Studio的离子型稀土矿边坡稳定性分析[J].中国地质灾害与防治学报,2016,27(2):72-77.WU Changfu,YAO Guijia,CHEN Liang,et al.Slope stability analysis for a ionic rare earth mine in-situ leaching based on Geo-Studio[J].The Chinese Journal of Geological Hazard and Control,2016,27(2):72-77.
[8]王洪丁,王观石,邱高磊,等.离子型稀土矿体强度特性试验研究[J].中国矿业,2016,25(9):136-140.WANG Hongding,WANG Guanshi,QIU Gaolei,et al.Research into strength characteristics for ion-adsorption rare earth ore[J].China Mining Magazine,2016,25(9):136-140.
[9]罗嗣海,黄健,王观石,等.寻乌离子型稀土矿体抗剪强度特性试验研究[J].科学技术与工程,2017,17(23):266-271.LUO Sihai,HUANG Jian,WANG Guanshi,et al.Experimental study on the characteristics of shear strength of Xunwu’s ion-type rare earth ore bodies[J].Science and Technology and Engineering,2017,17(23):266-271.
[10]尹升华,齐炎,谢芳芳,等.不同孔隙比下风化壳淋积型稀土矿强度特性[J].工程科学学报,2018,40(2):159-166.YIN Shenghua,QI Yan,XIE Fangfang,et al.Strength characteristics of weathered crust elution-deposited rare earth with different porosity ratio[J].Engineering Science Journal,2018,40(2):159-166.
[11]罗嗣海,袁磊,王观石,等.浸矿对离子型稀土矿强度影响的试验研究[J].有色金属科学与工程,2013,4(3):58-61.LUO Sihai,YUAN Lei,WANG Guanshi,et al.The effect of leaching on the strength of ion-adsorption rare-earth ore[J].Nonferrous Metals Science&Engineering,2013,4(3):58-61.
[12]姚康,罗嗣海,胡世丽,等.离子型稀土矿山临界注液强度的计算[J].有色金属科学与工程,2018,9(1):98-104.YAO Kang,LUO Sihai,HU Shili,et al.Calculation of critical liquid injection intensity for ion-absorbed rare earth mines[J].Nonferrous Metals Science and engineering,2018,9(1):98-104.
[13]王晓军,卓毓龙,邓书强,等.化学置换过程中稀土矿强度特性演化规律试验研究[J].江西理工大学学报,2016,37(3):56-60.WANG Xiaojun,ZHUO Yulong,DENG Shuqiang,et al.Experimental study on the evolution law of the strength characteristics of REO in displacement reaction[J].Journal of Jiangxi University of Science and Technology,2016,37(3):56-60.
[14]饶睿,李明才,张树标,等.离子型稀土原地浸矿采场滑坡特征及防控试验研究[J].稀土,2016,37(6):26-31.RAO Rui,LI Mingcai,ZHANG Shubiao,et al.Experimental study on landslide features and countermeasures of in-situ leaching stope of ion-type rare earth mines.[J]Chinese Rare Earths,2016,37(6):26-31.
[15]李永欣,王晓军,黄广黎,等.离子型稀土浸矿过程渗透率与黏聚力的关系研究[J].矿业研究与开发,2018,38(1):24-27.LI Yongxin,WANG Xiaojun,HUANG Guangli,et al.Research on the relation of permeability and cohesion in the leaching process of ion-type rare earth ore[J].Mining Research&Development,2018,38(1):24-27.
[16]LIN B,CERATO A B.Hysteretic shear strength and shear-induced volume change of natural expansive soils weathered from shale[C]//Geo-Congress 2014:Geo-characterization and Modeling for Sustainability.Atlanta,USA,2014:1347-1356.
[17]XIAO Jie,YANG Heping,ZHANG Junhui,et al.Surficial failure of expansive soil cutting slope and its flexible support treatment technology[J].Advances in Civil Engineering,2018,2018:1-13.
[18]XIAO Yanfei,LAI Fuguo,HUANG Li,et al.Reduction leaching of rare earth from ion-adsorption type rare earths ore:II.compound leaching[J].Hydrometallurgy,2017,173:1-8.
[19]郭钟群,金解放,赵奎,等.离子吸附型稀土开采工艺与理论研究现状[J].稀土,2018,39(1):132-141.GUO Zhongqun,JIN Jiefang,ZHAO Kui,et al.Status of leaching technology and theory of ion adsorption type rare earth ores[J].Rare Earth,2018,39(1):132-141.