Geographical Mining Methodology :
Three quarries namely Tantra quarry , Raikela quarry and Raikela west have been developed in northern and southern side of the lease area. The details of the quarries have been outlined. Benches of these quarries exposes iron ore, laterite and shale. In addition to these, Bore Hole= 33 Nos, Trail Pit=19 Nos. and Trench= 6 Nos. done for details of Exploration. This Year Detail Exploration work is going on for 52 Bore Holes.
Bench Dimension & Slope Angle
Height and width of the benches is being maintained at 6m and 12m respectively. Overall quarry slope angle is proposed to keep at around 27° with horizontal.
Stripping ratio is calculated as 1 (tonnes of ore): 0.083 (m3 of waste)
Drilling, Mining & Transportation Equipment / Machinery :
DTH as well as jack-hammer drills are used for blast / shot hole drilling. Mining is done both by manually and mechanized means. Ten (10)/(20) tones capacity trucks/tippers are used for ore/waste transportation. Now to avoid short Hole drilling & blasting we are engaging Rock-breaker to avoid secondary blasting.
BENEFICIATION : Crushing / Manual Dressing :
Run-Off Mine Iron Ore boulders obtained from the face after blasting is hammered manually for sizing. Sized ore is stacked separately and loaded in tipper mechanically. In addition to this, mobile Crusher Plant and Screens are used for separation of ore from waste in to various sizes.
Sorting & Sizing :
Sorting and sizing is being done both by manually as well as by mobile Screens & Crusher. It is being feeding the Lump and getting the finished product i.e. (5-18) mm and Fines.
There is no proposal for washing of ore/minerals. Dry crushing & screening is adopted with water sprinkling arrangement for dust suppression.