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金属矿山 ›› 2007, Vol. 37 ›› Issue (12): 24-26+67.

• 采矿工程 • 上一篇    下一篇

机械压实作用对排土场堆浸渗透性的影响

王贻明1,吴爱祥1,2,杨保华1,陈学松1   

  1. 1.中南大学;2.北京科技大学
  • 出版日期:2007-12-15 发布日期:2012-02-07
  • 基金资助:

    * 国家973重点基础研究发展规划资助项目(编号:2004CB619206),国家科技创新群体项目(编号:54321042),国家杰出青年科学基金资助项目(编号:50325415),国家自然科学基金资助项目(编号:50574099)。

Effect of Mechanical Compaction on Permeability Coefficient of Dump Site Leaching

Wand Yiming1,Wu Aixiang1,2,Yang Baohua1,Chen Xuesong1   

  1. 1.Central South University;2.University of Science and Technology Beijing
  • Online:2007-12-15 Published:2012-02-07

摘要: 渗透系数低是当前我国排土场堆浸所面临的主要问题之一,粉矿含量及压实度是影响排土场浸堆渗透性的重要因素。采用室内试验的方法,系统研究了不同粉矿含量及不同压实度条件下,样品的渗透系数,并从机械压实机理上研究了机械压实对浸堆的压实和破碎作用。结果表明:随着粉矿含量从10%增加至35%,样品的渗透系数降低一个数量级,样品从透水层渐变为半透水层。随着压实度的增加,样品的渗透系数急剧降低,在试验条件下,压实度为84.74%时,样品渗透系数仅为自然状态的4.49%。因此,改进筑堆工艺,降低机械压实是提高排土场浸堆渗透系数的有效途径。

关键词: 机械压实, 排土场, 堆浸, 渗透系数

Abstract: Low permeability coefficient is one of the main problems in dump leaching in China, and fine content and compactness are the important factors influencing the permeability coefficient of a dump site. Laboratory tests were made to study the permeability coefficient of samples at different fine contents and compaction conditions and to study theoretically the compaction and crushing effect of mechanical compaction on the leaching dump. The results show that with the fine content increasing from 10% to 35%, the permeability coefficient of the sample was decreased by one order of magnitude and the sample was turned from a permeable layer into a semi-permeable layer. With the increase of the compactness, the permeability coefficient was rapidly reduced. Under the test conditions, when the compactness is 84.74%, the permeability coefficient of the sample is only 4.49% of that at its natural state. Therefore, the improvement of stacking technology for reducing the mechanical compaction is an effective way to raise the permeability coefficient of the dump leaching pile.

Key words: Mechanical compaction, Dump site, Dump leaching, Permeability coefficient