电渗和振动对细尾矿砂静载固结排水的促进作用

The promotion effect of electro-osmosis and vibration to static loading consolidation drainage of fine tailings

为研究电渗、振动对细尾矿砂静载固结排水的促进作用,利用改装的空心圆柱扭剪仪进行试验研究,分别得到了不同静载压力下,单独静载、静载联合电渗和静载联合振动作用下的固结排水量。试验结果表明:随着静载压力的增加,排水量增加,排水时间减小。在单独静载基础上增加一种排水措施即会增加排水量且减少排水时间。振动在静载压力较小或固结早期的促进作用较好,电渗在静载压力较大或固结后期的促进作用较好。频率是影响振动排水的主要因素,且存在最佳排水频率,振动排水具有明显的时间优势。电渗排水的影响因素主要为电势梯度和试件导电性,电势梯度越大排水效果越好。

In order to study the promotion effect of electro-osmosis and vibration to static loading consolidation drainage of fine tailings,the laboratory tests was carried out by converted hollow cylinder apparatus,the drainage of sole static loading and joint action of static loading with vibration or electro-osmosis were operated separately.The results showed that with increase of static loading pressure,quantity of drainage increased and drainage time decreased.Every new way will get new drainage and reduce drainage time on the basis of sole static loading.The vibration had better effect in time of smaller static loading pressure or early consolidation stage,the electro-osmosis had better effect in time of bigger static loading pressure or later consolidation stage.The frequency is important influence factors of vibration drainage,and there should have the best frequency,the advantage in time of vibration drainage is very obvious.The main influence factors of electro-osmosis drainage are potential gradient and electroconductivity of specimen,the bigger the potential gradient,the better the drainage effect.