Openpit Design Fundas

33
Venkat
  • date post

    19-Oct-2014
  • Category

    Technology

  • view

    7.744
  • download

    1

description

 

Transcript of Openpit Design Fundas

Page 1: Openpit Design Fundas

Venkat

Page 2: Openpit Design Fundas

2

Parts of a bench

Geometrical Considerations

Cumulative frequency

distribution of measured

bench face angles (Call, 1986).

Page 3: Openpit Design Fundas

3

Section through a working bench.

Functioning of catch benches.

Geometrical Considerations

Page 4: Openpit Design Fundas

4

Double benches at final pit limits. Catch bench geometry (Call, 1986).

Typical catch bench design dimensions (Call, 1986).Bench height Impact zone Berm height Berm width Minimum bench width

(m)153045

(m)3.54.55

(m)1.523

(m)45.58

(m)7.51013

Geometrical Considerations

Page 5: Openpit Design Fundas

5

Safety berms at bench edge

Geometrical Considerations

Page 6: Openpit Design Fundas

6

Height of reach as a

function of bucket

size.

Geometrical Considerations

Page 7: Openpit Design Fundas

7

Example orebody geometry.

Ramp access for the example orebody.

Blast design for

the ramp

excavation.

Geometrical Considerations

Page 8: Openpit Design Fundas

8

Shovel Working Range

Page 9: Openpit Design Fundas

9

Minimum width drop cut

geometry with shovel

alternating from side to side.

Geometrical Considerations

Page 10: Openpit Design Fundas

10

Minimum width drop cut

geometry with shovel

alternating from side to side.

Geometrical Considerations

Page 11: Openpit Design Fundas

11

Isometric view of the ramp in

waste approaching the

orebody.

Diagrammatic

representation of the

expanding mining front.

Geometrical Considerations

Page 12: Openpit Design Fundas

12

Dropcut / ramp placement in ore. Expansion of the mining front.

Geometrical Considerations

Page 13: Openpit Design Fundas

13

Plan view of an actual pit bottom

Showing drop cut and mining

Expansion (McWilliams, 1959).

Geometrical Considerations

Page 14: Openpit Design Fundas

14

Extension of the current

Ramp close to the pit wall

(McWilliams, 1959).

Geometrical Considerations

Page 15: Openpit Design Fundas

15

Creating initial access /

benches.

Shovel cut sequence when

initiating benching in a hilly

terrain (Nichols, 1956).Sidehill cut with a shovel.

Geometrical Considerations

Page 16: Openpit Design Fundas

16

Detailed steps in the

development of a

new production level.

Geometrical Considerations

Page 17: Openpit Design Fundas

17

Parallel cut

with drive by.

Geometrical Considerations

Page 18: Openpit Design Fundas

18

Parallel cut with

the double

spotting of trucks.

Geometrical Considerations

Page 19: Openpit Design Fundas

19

Parallel cut with

the single spotting

of trucks.

Geometrical Considerations

Page 20: Openpit Design Fundas

20

Time sequence

showing shovel

loading with single

spotting.

Geometrical Considerations

Page 21: Openpit Design Fundas

22

Time sequence

showing shovel

loading with double

spotting.

Geometrical Considerations

Page 22: Openpit Design Fundas

23

(Continued).

Geometrical Considerations

Page 23: Openpit Design Fundas

24

Geometrical Considerations

(Continued).

Page 24: Openpit Design Fundas

25

Section and plan views through a working bench.

Simplified presentation of a safety berm.

Geometrical Considerations

Page 25: Openpit Design Fundas

26

Initial geometry for the push back example.

Cut mining from bench 1.

Cut mining from bench 2.

Geometrical Considerations

Page 26: Openpit Design Fundas

27

Overall slope angle.

Safety bench geometry

showing bench face angle.

Geometrical Considerations

Page 27: Openpit Design Fundas

28

Overall slope angle with ramp included.

Interramp slope angles.

Geometrical Considerations

Page 28: Openpit Design Fundas

29

Overall slope angle with

Working bench included.

Interramp angles associated with

the working bench.

Geometrical Considerations

Page 29: Openpit Design Fundas

30

Overall slope angle with

one working bench an a ramp section.

Interramp slope angles for a slope containing

a working bench and a ramp.

Geometrical Considerations

Page 30: Openpit Design Fundas

31

Overall slope angle for a

slope containing two

working benches.

Geometrical Considerations

Page 31: Openpit Design Fundas

32

Slopes for each working group.

Geometrical Considerations

Page 32: Openpit Design Fundas

33

Final overall

pit slope.

Geometrical Considerations

Page 33: Openpit Design Fundas

THANKS