(中南大學(xué) 資源與安全工程學(xué)院，長(zhǎng)沙 410083)
摘 要: 根據(jù)多孔介質(zhì)中電動(dòng)力學(xué)效應(yīng)，在排土場(chǎng)浸出過(guò)程中，提出利用電場(chǎng)作用強(qiáng)化排土場(chǎng)滲透性能的方法，通過(guò)機(jī)理分析探討了電場(chǎng)作用對(duì)排土場(chǎng)滲透性能的影響。結(jié)果表明：電場(chǎng)作用能有效降低雙電層作用對(duì)排土場(chǎng)滲透率的影響；在足夠大的電場(chǎng)力作用下，孔隙中雙電層產(chǎn)生定向遷移，雙電層厚度減小，排土場(chǎng)滲透率明顯提高；在低滲透排土場(chǎng)中，排土場(chǎng)滲透率因數(shù)隨電場(chǎng)強(qiáng)度增大而單調(diào)遞增；而在高滲透排土場(chǎng)中，電場(chǎng)作用對(duì)排土場(chǎng)滲透率影響的幅度較小，表明利用電場(chǎng)作用提高低滲透率排土場(chǎng)的滲透性能具有非常大的潛力。
關(guān)鍵字: 電場(chǎng)作用；排土場(chǎng)；溶浸液；雙電層；滲透性能
effect of electric field
（School of Resources and Safety Engineering,Central South University, Changsha 410083, China）
Abstract:Based on electro-dynamic effect in porous media, the novel method for enhancement of permeability of dump in leaching process by effect of electric field was put forward, and the mechanism of the effect of electric field on the permeability of dump were introduced. The results show that the permeability of ore dump by electronic double layer can be depressed by effect of electric field. The thickness electronic double layer can be decreased by power of electric field large enough. The increment of permeability coefficient in low permeability dump is bigger than that in high permeability dump, showing that the potential is big to improve the permeability of dump with high clay content by effect of electric field.
Key words: effect of electric field; dump; leaching solution; electronic double layer; permeability
