WealthUnearthed

Delivering liquid energy, cost

effectively “on tap” to the working

face

Conventional emulsion delivery

Vertical drop

Vertical drop delivery

Components of a vertical drop installation

Tanker arrives at mine

Surface infrastructure

Surface delivery point detail

Underground delivery point

Underground delivery point to isotainers and tanks

Isotainers outlet piping

Charging of MCU’s

Guideline costing for a vertical drop installation

Estimated total cost: USD 400K (~200m drop)

Case Study 1 – Vertical drop

Base case

Base case

• 180 000 tons production• ~220 tons emulsion

Vertical drop

Option 1

Vertical drop

Option 2

Tangible Benefits

Option 1 Option 2

CAPEX 400 000 400 000

NPV 260 169 401 473

IRR 48% 62%

Payback ~1.7 years ~1.5 years

Non-tangible Benefits

Case Study 2: Liquid energy on “tap”

Mining issues

Poor hangingwall conditions

Overbreak

Poor fragmentation

Mining issues cont…

Large bouldersrequiring secondary blasting

Mining issues cont…

Mining issues cont…

Poor inventory control and wastage

AEL MS Actions

• Blast redesign to address:

• Perimeter control

• Reduction of large boulders and minimise secondary blasting

• Improved fragmentation profile

• Manage explosive use

• Achieve design face advance of >=92%

Blast design:

• Reduced drilled holes

• Reduced powder factor

• Perimeter control

Blasting results

Barrels on the side walls

Half-casts in sidewall

35% on every face!!!

Barrels

Barrels on the hanging wall

Half-casts in hangingwall

Fragmentation profile

0

25

50

75

100

0 200 400 600 800 1000 1200 1400

% passing

Size - mm

Fragmentation analysis

96% Passing at 300mm

Face advance

88%

89%

90%

91%

92%

93%

94%

95%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

advance/drilled length average advance/drilled length

Inventory control

Further benefits

Conclusions

AEL MS have formulations and equipment that allow for

perimeter blasting to reduce rockwall damage

deliver on customer specifications

AEL MS Use blast designs in conjunction with in-situ results to deliver on customer specifications

By means of vertical drop By means of vertical drop

AEL MS Innovate to create solutions for their

customers problems

YES

Thank You