EP 173 | The Theory of Sampling: Why Every Mining Decision Begins with a Representative Sample

EP 173 | The Theory of Sampling: Why Every Mining Decision Begins with a Representative Sample

Was the sample representative?

Every geological model, resource estimate, grade control decision and reconciliation result ultimately depends on the quality of the samples behind it. In this episode of Fresh Thinking by Snowden Optiro, Melanie Bulley is joined by Senzeni Mandava Matondi to explore the Theory of Sampling and why representative sampling is fundamental to reliable decision-making throughout the mining value chain.

They discuss why natural heterogeneity makes sampling challenging, the difference between correct and incorrect sampling errors, why precision should not be confused with representativity, and why even highly precise laboratory analysis cannot correct a sample that was unrepresentative from the beginning.

The episode also explores the practical consequences of poor sampling, including ore loss, dilution, poor reconciliation and unreliable resource estimates. In this episode:

  • Why sampling is the foundation of mining data
  • Understanding representativity and natural heterogeneity
  • Correct vs. incorrect sampling errors
  • Precision vs. representativity
  • Why laboratories cannot fix poor sampling
  • The impact of sampling on grade control and reconciliation
  • Principles of good sampling practice

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EP 176 | Evolving Air Quality Regulations: A Catalyst for Electric Machine Adoption

EP 176 | Evolving Air Quality Regulations: A Catalyst for Electric Machine Adoption

Changing workplace exposure limits could become an important driver of battery electric vehicle adoption in underground mining. In this episode of Fresh Thinking by ‪@SnowdenOptiro‬, Hamish Guthrie is...

23 Syys 8min

EP 174 | Platinum: Is It Worth Its Weight in Gold?

EP 174 | Platinum: Is It Worth Its Weight in Gold?

Platinum is one of the world's rarest and most geographically concentrated metals, with applications spanning the automotive, industrial, jewellery and emerging hydrogen sectors. But what does its evo...

10 Syys 11min

EP 172 | Tailings Are Not Just Relocated Ore: The Nuances of Tailings Mineral Resource Estimates

EP 172 | Tailings Are Not Just Relocated Ore: The Nuances of Tailings Mineral Resource Estimates

Tailings Mineral Resource Estimates can appear straightforward. The material has already been mined, crushed, processed and deposited in one location — but tailings facilities present their own unique...

26 Elo 13min

EP 171 | Part 2 of 2: Managing Uncertainty - How Better Grade Control Leads to Better Decisions

EP 171 | Part 2 of 2: Managing Uncertainty - How Better Grade Control Leads to Better Decisions

In Part 2 of our Fresh Thinking by @SnowdenOptiro  two-part series, host Melanie Bully is joined by Senzeni Matondi to continue the discussion on why the most expensive mistake in grade control isn't ...

19 Elo 6min

EP 175 | Why Resource & Reserve Reconciliation Matters

EP 175 | Why Resource & Reserve Reconciliation Matters

In this episode of Fresh Thinking by Snowden Optiro, Rayleen Hargreaves, Principal Consultant at Datamine and Product Owner of Reconcilor, talks with Ian Glacken, Executive Consultant at Snowden Optir...

17 Elo 21min

EP 170 | Part 1 of 2: Why the Most Expensive Mistake in Grade Control Isn't Low Grade

EP 170 | Part 1 of 2: Why the Most Expensive Mistake in Grade Control Isn't Low Grade

What if the most expensive mistake in grade control isn't mining low-grade material — but making the wrong decision about what is ore and what is waste? In this two-part episode of Fresh Thinking by S...

12 Elo 4min

EP 169 | Why Good Estimates Can Still Produce Poor Reconciliation

EP 169 | Why Good Estimates Can Still Produce Poor Reconciliation

If your resource model is statistically robust, why doesn't it always reconcile with production? In this episode of Fresh Thinking by Snowden Optiro, Melanie Bulley and Senzeni Mandava Matondi explore...

6 Elo 6min

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