- Benches
- Haul roads
- O.B. Dumps
- Workshop
Run-away ramps in mines can be seen at Haul roads.
- Toe
- Crest
- Foot
- Edge
Sub-grade drilling is useful in removing Toe in opencast mine workings.
- 2.0
- 3.0
- 6.0
- 7.5
- Loose boulders or tree within 3.0 meters from the top edges of benches will be removed safety.
- Cushion blasting
- Muffled blasting
- Pop shooting
- None of the above
To control the fly rock in the blasting Muffled blasting technique adopted
- 9.0
- 27.3
- 35.3
- 39.9
One cubic meter is equal to 35.3 cubic feet.
- 2.47 acres
- 3.00 acres
- 1.50 acres
- None of above
One hectare is equal to 2.47 acres.
- Improve performance
- Improve time of Blasting
- To control fly rocks and group vibrations
- None of the above
The main purpose of control methods of blasting in opencast mine is to control fly rocks and group vibrations.
- Insert detonator into explosive cartridge
- To check the cracks in shot hole
- To clean the shot hole
- All above
The Blaster’s tool known as Pricker made of wood or a non-ferrous metal is used to Insert detonator into explosive cartridge in blasting in open cast mine.
- 4 to 6
- 10
- 12
- Any number of buckets
Optimum Dumper and Excavator matching at 4 to 6 buckets of Excavator for optimum productivity in open cast mine.
- Form M
- Form P-I/P
- Form O
- None of the above
Form P-I/P are the standards for medical examination for miners
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