尾矿坝预埋排渗体合理位置分析

Analysis of Reasonable Position of Embedded Drainage Body in Tailings Dam

在尾矿坝体内合适的位置预埋具有透水功能的排渗体,利用这些排渗体在坝体内部形成足以控制浸润线高度的排渗系统,是目前工程设计中采用最多、最有效的方法。以某新建尾矿库工程为例,分析了预埋排渗体在坝体内的合理位置以及对坝体浸润线降深的影响。分析结果表明,预埋排渗体的合理位置应设置在尾矿坝的临界浸润线以下,这样既可避免因其埋设过浅而造成坝体的渗透破坏,又可避免因其埋设过深而造成工程投资的浪费,为尾矿坝的排渗设计提供依据。

Currently it is the most widely-adopted and effective method in the engineering design to apply the permeable drainage body embedded in the appropriate position of the tailings dam so as to form the drainage system controlling the height of seepage line within the dam body. Taking a newly-buih tailings dam project as an example, the proper position of the embedded drainage body and its influence to the seepage line drawdown are analyzed. The corresponding results demonstrate that the reasonable position of the embedded drainage body should be set below the critical seepage line of the tailings dam. This can avoid the damage brought to the dam body by the shallow embedding of the drainage body as well as the wastes of the engineering investment caused by the drainage body buried too deep. The above- mentioned conclusion thus provides a practical basis for the drainage design of the tailings dam.