ABSTRACT

Biological stabilisation of dump slope is one of the widely used techniques for controlling erosion and stabilisation of dump slope to maintain the local climate conditions least affected. Vegetation physically and mechanically reinforces the dump material, resists erosion and reduces pore water pressure. It also provides some information about the slope movement. Dump materials are heterogeneous, anisotropic and behave neither like soil nor like rock. The modeling of such materials is difficult and continuum material and boundary conditions do not provide appropriate and accurate results. The present paper evaluates the effect of vegetation on dump slope stability for a given dump geometry through discrete modeling approach. The dump slope angle and height was kept constant at 37° and 60m respectively and its stability analyzed without and with vegetation cover. It was found that vegetation increases the stability of the slope as approximately 85.5% reduction in maximum displacement was observed. Hence, the bioremedial measures are better than the physical measures to protect the erosion and contamination more effectively and acceptable without deteriorating the surrounding ecological balance.

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