delivering liquid energy cost effectively on tap to the working face - mark
DESCRIPTION
Blasting Masterclass 30 September 2014TRANSCRIPT
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