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Month March 2019

Where to find our Fresh Thinking podcasts – for those in the mining industry

You can find our Fresh Thinking technical podcasts on the following platforms: Google Podcasts Spotify Stitcher iTunes Happy listening! About our podcast presenters: Ian Glacken BSc (Hons) (Geology), MSc(Mining Geology), DIC, MSc(Geostatistics), Grad Dip Computing, FAusIMM(CP), FAIG, MIMMM, CEng Ian is…

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30 Seconds of Info: Reconciliation of planned and unplanned dilution for underground stopes

This week’s 30 Seconds of Reconciliation Info is from Ian Glacken our Director of Geology. Reconciliation of planned and unplanned dilution for underground stopes:  Typically, underground stopes of relatively limited dimensions (i.e. not sublevel or block caving shapes) are designed…

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30 Seconds of Info: Remember the ore blocks you design might not be the ore blocks you mine.

This week’s 30 Seconds of Reconciliation Info comes from Ian Glacken our Director of Geology. Remember that the ore blocks you design may not be the ore blocks you mine:  Always remember that ‘as-designed’ may not (usually will not) be…

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PODCAST: Declustering… what is the true grade?

In this week's Fresh Thinking by Optiro podcast, Ian Glacken our Director of Geology, and Paul Blackney our Principal Consultant Geology discuss declustering and where to use it. Declustering is a critical technique to understand and use when estimating a resource. It helps you get a more accurate picture of the whole ore body, but why is it controversial in parts of the industry? The podcast at a glance: 0:51 What is declustering and why is mining data clustered? 1:41 What are the implications of not declustering? 2:03 When is declustering useful? 2:52 Do we need to apply declustering to ordinary kriging? 3:26 What are some of the normal methods used when declustering? 5:12 So not everyone uses declustering. Why do some practitioners disavow it? 6:10 Do you both agree on when to apply declustering? 7:22 Are there any circumstances when its mandatory to decluster? 9:12 Where should people go to learn more?
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