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Rio Tinto Kennecott
April 2014
2014 Mine Design, Operations & Closure Conference
Lessons from Kennecott Utah Copper’s Manefay SlideCody Sutherlin, Manager Cornerstone Operations
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Rio Tinto Kennecott Overview2
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Rio Tinto Kennecott – Bingham Pit Mine
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Before the Manefay Slide - April 9th 2013
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After the Manefay Slide
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East Wall Geology
September 2012
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Incident AreaExpected Impact Area
10% of pit floor coveredActual Impact Area
95% of pit floor covered
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Pre-Incident Photo of West Pit Floor
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Post-Incident Photo of West Pit Floor
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P&H 4100 C Shovel
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Berm ConstructedKomatsu 930 SE Haul trucks
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Bingham Truck Shop 12
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Employees were safely evacuated and accounted for with no injuries
April 10, 2013
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Nine layers of protection
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The Geotechnical monitoring system at the Bingham Canyon Mine provides nine layers of safety, mitigating a potentially catastrophic event during Manefay slide
1) 800+ trained eyes everywhere
2) Routine documented inspections
3) IBIS slope stability radars
4) GroundProbe slope stability radars
5) 300+ Prism network and five RTS skyboxes
6) Time Domain Reflectometry
7) GPS Monitoring
8) Extensometers
9) Micro seismic array
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IBIS Radar Manefay Movement
IBIS radar Manefay data
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Pre-incident movement zoneConsolidated movement estimated to exceed 100 million tons
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Geotech Daily Manefay Status Update
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Infrastructure Relocation
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44kv Electrical Line Relocation
Communication Tower Relocation
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Building Relocation
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Available Assets 21
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Keystone Access
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Keystone Access
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Daily Average Exceeded
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68 Shovel
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Producing Beyond Historical Rates
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50ktpd
70ktpd
100ktpd
120ktpd
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Total Equipment Haul Trucks 20
Dozers 38
Drills 4
Excavators 15
Loaders 3
Shovels 2
Remote Systems 25
Manufactures and Suppliers• Caterpillar• Komatsu• Joy Global (P&H)• Hitachi• Atlas Copco• Sandvik• Arnold Equipment• TORC Robotics• ASI• Remote Control Technologies
Equipment Delivery
Support from our partners was critical to our success
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Hitachi EX5600 Hydraulic Shovel Build
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Hitachi Shovel Build Completed
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Komatsu 930 SE Trucks in Pit Bottom
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Komatsu 930 SE Truck Milestones
•First truck commissioned – June 30th
•First truck in pit bottom - July 26th
•Fourth truck in pit bottom - August 15th
•20th truck commissioned - October 31st
First new 930 SE Truck in Pit Bottom
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Remediation Work
+400ft Vertical Scarps
Remaining Rock mass on slide plane – Poss. Of 20Mt failure
Truck Shop Destroyed
Pit Access Road Destroyed +1500ft
More than 2000 vertical feet of covered benches
Bottom of pit covered +300ft deep
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Slide Remediation Workstreams
6190 Scarp1.0M Tons
Intermediate Scarp0.85M Tons
Head Scarp25M Tons
10% Cut1.9M Tons
10% Fill1.8M Tons
E5 Benches0.9M Tons
E5 Spillover3.5M Tons
(2.2M tons to re-open 10%)
E4 Benches2.6M Tons E4 Spillover
5.8M Tons
Fill Bridge 28.8M Tons Fill0.6M Tons Cut
Pit Bottom114M Tons
1
2
3
4
6
89
5 10
11
12
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Remediation Timeline
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Head Scarp Mining – May 2013
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Autonomous Drilling
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Remote and Manned Equipment Working Together
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Head Scarp Mining – September 2013
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Head Scarp Completion – November 2013
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Remote Dozer Recovery
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Remote Dozer Recovery
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Bingham Shop Removal
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Bingham Shop Removal With Remote Excavator
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6690 Knob Remediation
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6690 Knob Remediation
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6690 Knob Remediation
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6690 Knob Completion
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E5 Bench Cleaning
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E5 Bench Cleaning Completion
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New Pit Access Road Design
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New Pit Access Road Construction
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New Pit Access Road Mining
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Uncovering E4 North
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Fill Bridge Road and E4 North
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E4 North Mining – Nov. 2013
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E4 North Mining – Jan. 2014
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Delivered Ahead of Schedule and Without Injury!
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Kennecott Utah CopperRising To The Occasion!
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