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Boddington Gold Blasthole Sampling at Newmont Boddington Gold Sampling 2013 – Brisbane May 2013.

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Presentation on theme: "Boddington Gold Blasthole Sampling at Newmont Boddington Gold Sampling 2013 – Brisbane May 2013."— Presentation transcript:

1 Boddington Gold Blasthole Sampling at Newmont Boddington Gold Sampling 2013 – Brisbane May 2013

2 00/00/00Place title of presentation here2 Newmont Boddington Gold

3 00/00/00Place title of presentation here3 Geological Setting

4 Boddington Open Pit 00/00/00Place title of presentation here4 North Pit South Pit Waste Dump

5 00/00/00Place title of presentation here5 Ultimate Pit If notes are needed they are Arial 10pt. Ultimate Pit Dimensions  Length: ~4,000 m  Width: ~1,000 m  Depth: ~700 m Image of the skyscraper, Burj Khalifa Dubai, to depict the future depth of the Boddington pit.

6 00/00/00Place title of presentation here6 Pit Geology If notes are needed they are Arial 10pt.

7 Mining Fleet Placeholder for Rope shovel

8 00/00/00Place title of presentation here8 Shovel Dipper

9 00/00/00Place title of presentation here9 Drill and Blast Fleet Needs decent picture with dust skirts If notes are needed they are Arial 10pt.

10 00/00/00Place title of presentation here10 Boddington Mill Text starts here, Arial 20pt. Level 2, Arial 20pt Level 3, Arial 14pt Level 4, Arial 14pt Level 5, Arial 14pt If notes are needed they are Arial 10pt.

11 00/00/00Place title of presentation here11 Grade Control Requirements 55% of 2014 total movement is Ore

12 Key Challenges for Sampling Safe – Minimise Exposure to High risks Costs – High Volume Low Cost Accuracy – Low Head Grade, requires Accurate, Precise Sampling. 1-2% increase in mill head grade delivers big benefits Fast – Keep the Pit working. 00/00/00Place title of presentation here12 Auger Sampling Selected

13 00/00/00Place title of presentation here13 Blasthole Spacing and Minimum Mining Size Blasthole Spacing 5m x 6.2m Kriged Blocks 5m x 5m x 6m Minimum Mining Size 20m x 20m x 12m Bench Height

14 00/00/00Place title of presentation here14 Blasthole Sampling Systems Considered

15 00/00/00Place title of presentation here15 Auger Sampling - Augers

16 Auger Sampling - Technique 00/00/00Place title of presentation here16

17 00/00/00Place title of presentation here17 Auger Sampling - Theory Text starts here, Arial 20pt. Level 2, Arial 20pt Level 3, Arial 14pt Level 4, Arial 14pt Level 5, Arial 14pt If notes are needed they are Arial 10pt.

18 Electronic Data Capture 00/00/00Place title of presentation here18

19 00/00/00Place title of presentation here19 Sample Protocol Testing Hole drilled through Tarpaulin to prevent contamination. 5 Auger Samples taken (1 for Production, 4 for test work) 2 Spear Samples for comparison Remainder Alternate Shovelled to 5 piles 1 Pile Selected at random (post shovelling) and dispatched for rotary splitting. 11 sub samples split and assayed. Remainder of pile reserved for CRM generation

20 00/00/00Place title of presentation here20 Sample Protocol Testing If notes are needed they are Arial 10pt. Auger Possibly Biased low at low grades (<0.2g/t) Generally within the variability of the lot

21 00/00/00Place title of presentation here21 Ongoing QAQC - Field Duplicates Text starts here, Arial 20pt. Level 2, Arial 20pt Level 3, Arial 14pt Level 4, Arial 14pt Level 5, Arial 14pt If notes are needed they are Arial 10pt. 2,434 Field Duplicates in 2012 (~8% of samples duplicated) Between 0.1g/t and 1g/t Au 85% of Samples <0.1g/t error 95% of Samples <0.2g/t error

22 Particle Size Sensitivity 00/00/00Place title of presentation here22

23 00/00/00Place title of presentation here23 Mill Reconciliation

24 00/00/00Place title of presentation here24 Boddington and RC drilling Rock Strength – Mpa Historic Low Penetration rates (>15 years experience on site with multiple contractors) Diamond almost same meterage cost for Resource Definition drilling. If notes are needed they are Arial 10pt.

25 00/00/00Place title of presentation here25 RC – Blasthole Comparison pattern Tight spaced RC drilling on 10m Centres(Green) with 2m Samples Blastholes Sampled (Red)

26 00/00/00Place title of presentation here26 RC – Blasthole Comparison - Nearest Hole Note: No Change of Support conducted

27 00/00/00Place title of presentation here27 RC – Blasthole Comparison Complete Blast Note: No Change of Support conducted

28 00/00/00Place title of presentation here28 RC vs. BH Drilling Business Case Technical Excellence is not a Business Case (Dunham 2012) If notes are needed they are Arial 10pt. Estimated Cost increase requires ~3-5% mill head grade increase to cover. Operational Impact of 4-5 Grade Control RC rigs Is there an issue to resolve?

29 Blasthole Sampling Delivery 00/00/00Place title of presentation here29 TotalPercentage Assayed 303, % Safety or Loaded % Trashed 3, % Contaminated % Sampling Issues 4, % Not Sampled 5, % Total 319,729 95% of blastholes with sampling assigned sampled project to date. Minimal Sampling issues (Wet holes/Small collars) Minimal Shovel downtime “Waiting for Markup” (<30hrs in 2012) Good Reconciliation

30 00/00/00Place title of presentation here30 Blasthole Sampling Summary Blasthole Sampling can work given; The Right Deposit The Right Sampling System – tested and verified at that site Ongoing test work and evaluation Ensure it is supported by RC drilling where required Management Buy-In. If notes are needed they are Arial 10pt.

31 00/00/00Place title of presentation here31 Are Augers the answer? Potential Overextension Injuries in Samplers/Technicians if poor techniques employed. Experienced at 3 mines where system is used. Can be managed but limits time in role and recruiting pool.

32 Globally the Industry needs an automated, reliable blasthole sampling system. 00/00/00Place title of presentation here32

33 Thanks and Acknowledgements Dominique François-Bongarçon. Newmont Boddington Gold Ore Control Team, past and present, especially Letitia Scott, Alison Compton and Jodie Gray. Newmont Boddington Gold Drill and Blast department. 00/00/00Place title of presentation here33


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