Advertisement

Formative mechanism of preferential solution flow during dump leaching

  • Wu Ai-xiang Email author
  • Yin Sheng-hua 
  • Liu Jin-zhi 
  • Yang Bao-hua 
Article

Abstract

Preferential flow is a rapid movement of solution through pores caused by coarse ores. Macropore is the main factor for the preferential flow. Macropore can be defined from three aspects. Segregation of the ores during dumping was studied according to particle kinematics. Small ores become smaller under the effect of acid and weathering. Clay in the rainwater from the hillside precipitates in the dump. Segregation and fine ores are the main causes in macropore. The permeability in coarse ores is better than that in fine ores. The mechanism in the preferential flows was studied combining the fast conducting effect of the macropore. Experimental result shows that, at certain application rate, fine ore area is saturated while large volume of solution flows laterally to the coarse ore area and leaks out quickly through the macropores. Thus the mechanism of preferential solution flows is further illustrated.

Key words

macropore segregation sliming permeability preferential solution flow 

CLC number

TD853.87 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    Allaire-Leung S E, Gupta S C, Moncrief J F. Water and solute movement in soil as influenced by macropore characteristic[J]. Journal of Contaminant Hydrology, 2000(41): 283–301.Google Scholar
  2. [2]
    Öhrström P, Hamed Y, Persson M, et al. Characterizing unsaturated solute transport by simultaneous[J]. Journal of Hydrology, 2004, 289: 23–35.CrossRefGoogle Scholar
  3. [3]
    Dou C, Woldt W, Bogardi I. Fuzzy rule- based approach to describe solute transport in the unsaturated zone[J]. Journal of Hydrology, 1999, 220: 74–85.CrossRefGoogle Scholar
  4. [4]
    Inoue M, Šimunek J, Shiozawa S, et al. Simultaneous estimation of soil hydraulic and solute transport parameters from transient infiltration experiments[J]. Advances in Water Resources, 2000, 23: 677–688.CrossRefGoogle Scholar
  5. [5]
    NI Yu-wen, OU Zi-qing. Research advance of soil preferential flow and pollutant priority migrate[J]. Soil and Environment, 2000, 9(1): 60–63. (in Chinese)Google Scholar
  6. [6]
    WU Ai-xiang, LI Qing-song, YIN Sheng-hua. Study on the mechanism of improving the penetrability of the high-clay ore heaps[J]. Journal of Xiangtan Mining Institute, 2003, 18(4): 1–5. (in Chinese)Google Scholar
  7. [7]
    SUN Ke-cheng. The operation practice of conducting large scale heap leaching[J]. Gold, 2000, 21(7): 33–35. (in Chinese)Google Scholar
  8. [8]
    LIU Wei. Characterizing macropores in soil[D]. Shenyang: Institute of Applied Ecology, Chinese Academy of Science, 2001. (in Chinese)Google Scholar
  9. [9]
    Solution Mining Technology Editor committee. Solution mining technology[M]. Beijing: Atomic Energy Press, 1994. (in Chinese)Google Scholar
  10. [10]
    FANG Jin-wei, LI Wei-zhong. Summary of development and application of copper extractive[J]. Nonferrous Metal Smelt, 1999, 28(2): 30–32. (in Chinese)MathSciNetGoogle Scholar
  11. [11]
    MA Ying-jun, HUO Run-ke, XU Zhi-fang. Ree behavior and influence factors during chemical weathering[J]. Advance in Earth Sciences, 2004, 19(1): 87–94. (in Chinese)Google Scholar
  12. [12]
    Vogel T, Gerke H H, Zhang R, et al. Modeling flow and transport in a two-dimensional dual-permeability system with spatially variable hydraulic properties[J]. Journal of Hydrology, 2000, 238: 78–89.CrossRefGoogle Scholar
  13. [13]
    GU Wei-ci. Seepage computation theory and its application [M]. Beijing: China Architecture and Building Press, 2000. (in Chinese)Google Scholar

Copyright information

© Science Press 2001

Authors and Affiliations

  • Wu Ai-xiang 
    • 1
    Email author
  • Yin Sheng-hua 
    • 1
  • Liu Jin-zhi 
    • 2
  • Yang Bao-hua 
    • 2
  1. 1.School of Civil and Environment EngineeringUniversity of Science and Technology BeijingBeijingChina
  2. 2.School of Resources and Safety EngineeringCentral South UniversityChangshaChina

Personalised recommendations