What precautions will be taken:Making an overburden dump in big opencast mine using draglines
Precautions in making OB dump in a dragline mine: Height and slope of dump face should be designed by a research institute based on type of OB,seam dip,nature of floor, drainage,reach and dumping height of dragline production etc.Interface layer I.e.debris or coal dust,fragmented rock soil mixed with water should be cleared as far as possible from the de-coaled floor before dumping by dragline starts.If it cannot be avoided,the floor should be ripped or blasted to a depth of 1-1.5m before start of dumping by dragline to improve frictional resistance at base of the dump.Top soil should be dumped separately.Under no circumstances should such material be placed at base of the dump.OB excavated ...