PARAMETERS AND DESIGN OF BENCHES & HAUL ROADS IN OPEN CAST MINE WORKINGS

1. K. Krishnudu, FCC(R), Manager, Mines Group Vocational Training Centre,
Hosapete. Email: krishnudukalva@gmail.com

2. DESIGN PARAMETERS OF OPENCAST MINE BENCHES

3. OPEN CAST MINEWORKING

4. DRILLING FOR BLASTING

5. BLSTING IN OPENCAST MINE

6. BENCH WIDTH
BENCH HEIGHT
BENCHES IN OPENCAST MINE

7. 60°
BENCH FACE SLOPE IS MAINTAINED AT 60° FROM
HORIZONTAL
BENCH SLOPE
BENCH FACE SLOPE

8. TRUCK WIDTH
4 METERS
TRUCK WIDTH
4 METERS
HALF TRUCK WIDTH
2 METERS
CLEARANCE FOR TRUCKS ON TWO WAY

9. HAUL ROAD WIDTH AS PER DGMS STANDARDS
SAFETY BUND
Haul Road Width = 3 Times the Width of Biggest Vehicle

10. MINE HAUL ROAD AND ACCESS ROAD TO PIT/MINE

11. SAFETY BUND
HAUL ROAD GRADIENT
ROAD GRADIENT 1 IN 16 FOR MOVEMENT OF HAUL TRUCKS

12. SHORT RAMPS 1 IN 10 FOR MOVEMENT OF HEAVY
MACHINERY FROM BENCH TO BENCH
SHORT RAMPS BENCH TO BENCH

13. ROAD GRADIENT 1 IN 16 FOR MOVEMENT OF HAUL TRUCKS
HAUL ROAD GRADIENT

14. MATCHING ROADS WITH 1 IN 16 GRADIENT FROM ONE BENCH
TO ANOTHER BENCH FOR TRAVELLING OF DUMPERS
HAUL ROAD GRADIENT

15. SAFETY BUND

16. VISIBILITY AT ROAD CURVE ATLEAST 30 METERS AHEAD

17. ESCAPE LINE IN HAUL ROAD

18. MATERIAL HAULING ROAD IN MINE BENCH WORKING