Abstract
The Jayant opencast operation is one of the largest opencast coal mines in India. Prior to 2008 the mine experienced a number of dragline dump failures, which was a major hindrance in sustaining production. Northern Coalfields Limited (NCL) and the mine management engaged several design, research, and academic institutions to carry out dump slope stability studies, particularly of dragline dumps. Birla Institute of Technology prepared a report on the investigations in May 2009. In this paper we review the findings of the report and the measures taken to tackle the safety aspects of dragline dumps.
Highlights
The Journal of the Southern African Institute of Mining and MetallurgyWhere Pa = Height of seepage at the toe of the dump
The Jayant opencast operation is one of the largest opencast coal mines in India
Prior to 2008 the mine experienced a number of dragline dump failures, which was a major hindrance in sustaining production
Summary
Where Pa = Height of seepage at the toe of the dump. L or β = Overall angle of slope of dump. Dp = Behind the toe of dump i.e., 60 m. With this height of water table, the seepage and hydrostatic forces are calculated and considered in the stability calculation. The height of the water table is calculated as 25 and 36 m (Table I)
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