All mining and transportation at the mine are undertaken by contractors.
The bauxite deposit of Bodai-Daldali Bauxite mines is situated over the plateau and the ground terrain is flat.
As the Bauxite deposit is found in shallow depth, therefore opencast mining method has been adopted. All workings are being carried out by mechanised way, by using excavator of 2.5 to 4.6 Cum size, dumper of 15- to 25 tons capacity, blast hole drill machine, 110 mm dia, dozer and now crusher with screening plant is being proposed instead of manual sorting and sizing.
The over burden is top soil & soft laterite of 0 to 3.00 meters thickness after which there is a hard overburden of thickness varying from 0 to 6.00 meters. The thickness of ore zone is 0 m to 4.00 m and is flat.
In general working is of shallow depth of avg. 4 to 6 m (maximum up to 10 m), therefore concurrent backfilling method has been adopted.
The general practice is to scrap the top soil separately by dozer, or excavator dumper combination and use it for directly spreading over already backfilled compacted area. Drilling and blasting is practiced in hard OB benches and ore benches. Excavation is done by excavator dumper combination.
Since the deposits are boulder in nature, bauxite needs to be separated from laterite and murrum. It is proposed to mechanically crush and screen the ore so as to obtain desired grade bauxite with acceptable silica content.
< ........
