Orica Limited · ASX:ORI

Orica — Technical Presentation (June 2017)

17 slides from Orica's technical presentation, June 2017

1. Slide 1: Fragmentation & Fracture from Blasting for Insitu Recovery

   FRAGMENTATION & FRACTURE FROM BLASTING FOR INSITU RECOVERY Stephen Boyce: Global Research Manager Alan Minchinton: Senior Research Fellow Document reference

2. Slide 2: Topics

   TOPICS • Factors influencing fracture and fragmentation • Applying the science of blasting to Block Caving and Conditioning Rock • A conceptual hybrid mining system for ISR 2 © Orica Limited Group CONFIDENTIAL: Information contained in this document is strictly confidential.

3. Slide 3: Factors Influencing Fracture & Fragmentation from Blasting

   FACTORS INFLUENCING FRACTURE & FRAGMENTATION FROM BLASTING Uncontrollable Parameters • Geology –mineral properties, heterogeneity, hardness etc, • Structure – discontinuities, faults, depth etc. • Geotechnical stress – natural & mining induced • Ground water Controllable factors • Total Explosive En

4. Slide 4: Stress, Strain, Waves, Gas, Fracture

   STRESS, STRAIN, WAVES, GAS, FRACTURE MBM – axisymmetric fracture modelling including gas flow Stress waves around a single blasthole Fractures showing gas flow (red) 4 © Orica Limited Group

5. Slide 5: Normalised Energy & Reaction Rate

   NORMALISED ENERGY & REACTION RATE 10 9.9 8 6 4.3 4 2.87 2.7 2.49 2.09 2.23 2.1 2 1.7 1.7 1 1 0 Effective Energy Reaction Rate Novalite Flexigel ANFO Aquachg Fortis Vistis Prism. Rock: Andesite Diameter 270 mm 5 © Orica Limited Group

6. Slide 6: Single Blasthole - Fracture

   SINGLE BLASTHOLE - FRACTURE (a) ANFO; (b) Fortis Extra; (c) Vistis Boddington diorite; 100 mm diam; 10 m charge 6 © Orica Limited Group

7. Slide 7: Effect of VOD

   EFFECT OF VOD High relative VoD Low relative VoD 7 © Orica Limited Group

8. Slide 8: Priming Position & Energy Distribution

   PRIMING POSITION & ENERGY DISTRIBUTION HelFire: VPPV (a) base-primed; (b) mid-primed; (c) top & bottom-primed 8 © Orica Limited Group

9. Slide 9: HelFire – Damage – Major SLC Mine

   HelFire – DAMAGE – Major SLC Mine Same drill pattern – pyro to electronic – changes to primer positions & timing HelFire 2D 9 © Orica Limited Group

10. Slide 10: Single & Multi-Priming

    SINGLE & MULTI-PRIMING Left: Base-primed Right: Multi-primed at 1, 3, 5, 7, 9 m (0 delay) 10 © Orica Limited Group

11. Slide 11: Single & Multi-Priming

    SINGLE & MULTI-PRIMING Multi-primed Base-primed 11 © Orica Limited Group

12. Slide 12: Fracture / Damage – Influence of Wave Reflection (Surfaces)

    FRACTURE / DAMAGE – INFLUENCE OF WAVE REFLECTION (SURFACES) Infinite rock mass Finite rock mass All surfaces transmissive Left, right, bottom surfaces No reflections from any transmissive surface Stress waves can reflect from top surface © Orica Limited Group

13. Slide 13: High Lift Drawbell & Undercut + Post Conditioning a Block Cave

    HIGH LIFT DRAWBELL & UNDERCUT + POST CONDITIONING A BLOCK CAVE Conventional Drawbell & Post Conditioning Blasting Concept Undercut development High Lift Method 13 © Orica Limited Group

14. Slide 14: Remote Ore Extraction System (ROES)

    REMOTE ORE EXTRACTION SYSTEM (ROES) A MINING SYSTEM FIRST PROPOSED BY THE CSIRO (JOCK CUNNINGHAM & IAN GIPPS) A Raise-bored hole is installed between the production and undercut level The sublevel distance will be determined by the geotechnical conditions of the mine. A Silo of fragmented and fractu

15. Slide 15: Concept: Creating Underground Leach Reactors Using ROES

    CONCEPT: CREATING UNDERGROUND LEACH REACTORS USING ROES 15 © Orica Limited Group

16. Slide 16: Concept: Creating Underground Leach Reactors Using ROES

    CONCEPT: CREATING UNDERGROUND LEACH REACTORS USING ROES 16 © Orica Limited Group

17. Slide 17: Thank You

    THANK YOU 17 © Orica Limited Group

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