ABSTRACT
This paper presents analyses of valley fill stability and spoil handling techniques in mountainous areas. The stability of the valley fills is assessed under various surface and subsurface configurations. The spoil handling techniques are reviewed and an Approximate Original Contour (AOC) Model is presented. The AOC model is used to determine the excess spoil disposal plans and valley fill final configuration criteria. The analyses of excess spoil disposal plans and valley fill stability helps in developing better strategy for reducing the impact of Mountaintop mining on the environment.
