Various Drawings for Practice

8/17/2019 Various Drawings for Practice

1/13

Figure 1 Plan view of mine Expanding along longer axis

Figure 2 Plan view of mine Expanding along shorter axis

Figure 3 Plan view of pit developed by shovel and dumper operations


2/13

Figure 4 Plan view of a bench developed by panel with Two blocks with longitudinal cuts

Figure 5 Plan view of a pit being mined with Transverse blocks, wide panel

Figure 6 Plan view of a pit being mined by shovel dumper showing blocks blasted, drilled and preparing

for drilling


3/13

Figure 7 Schemes of Mining Line Advancement and pit development


4/13

Figure 8 Schematic diagram of Mining of horizontal and inclined seam

Figure 8 Schematic diagram of a trench face

Rcr: Digging radius at the level of

crwalers

Rre: Rear end clearing radius

Rdg: Digging radius

m: clearance between rear end of

shovel and muck pile


5/13

Figure 9 face parameters of a BWE face.

CL – Distance between leading edge of

crawler and the center of rotation of the

BWE.

CW – Distance between the outside edge ofa crawler and the BWE centre line of

advance.

D – Digging wheel diameter measured at

cutting lips

D1 – Digging wheel diameter without

buckets, at wheel rim

DB – Discharge boom length

DD – Lowest elevation of the discharge

chute

DM – Highest elevation of the discharge

chute

E – Distance between the load boom pivot

point and the center of rotation of the

BWE

HD – Maximum depth of cut below crawler

level

HM – Maximum elevation the digging

wheel center

LB – Length of the load boom

LBW – Width of the load boom

Y – Elevation of the load boom pivot point

kh & k

d – Lowest and highest load boom

inclination angles

I &

r – Horizontal wheel free angles

I&

r – Vertical wheel free angles

I &

r – Maximum discharge boom slew angles

k – Minimum angle permitted between load and

discharge booms


6/13

Figure 10 BWE excavator face

Figure 11 Configuration of one BWE excavation block


7/13

Figure 12 Application of BWE with Conveyor bridge

Extended Bench Method of Dragline operation

This method of face development is applied when effective reach of the dragline is to beextended.

This is associated with certain degree of rehandling This method is useful when the overburden depths can not be handled by normal casting It may be necessary when overburden depths are gradually increasing or there is a temporary

change in relief.

Figure 13a Extended bench method of dragline

At the completion of the previous block, the dragline is located at the end of the bridge. From this

position the last of the block of OB can be spoiled directly . To start excavation of the new block, the

dragline is walked off the bridge and placed in line with the new high wall at ‘A’. This is now ready for

providing key cut for the block to be excavated


8/13

Figure 13b Extended bench method of dragline


9/13

Figure 13c Extended bench method of dragline


10/13

Figure 13c Extended bench method of dragline


11/13

Figure 14 Dragline and Bucket wheel excavator combined mining

Figure 15 Dragline and Bucket wheel excavator combined mining


12/13

Figure 16 Block mining by BWE


13/13

Figure 17 different possible slope failure of OB dump

Documents

Various Drawings for Practice