RRE – Recoverable Resource Estimation by nonlinear geostatistics | Training course
Be at the forefront of mining geostatistics and learn how to estimate recoverable resources and assess the risks of your mining project using uniform conditioning, multiple indicator kriging, conditional expectation and geostatistical simulation.
Objectives
- MODULE 1: UC/LUC – UNIFORM CONDITIONING AND LOCALIZATION
– Understand the limitation of kriging and smoothing effect in high drillholes spacing (during exploration) and the necessity of RRE methods to generate an unbiased grade-tonnage curve.
– Understand the algorithm of UC and apply support change and UC using Isatis.neo.
– Generate grade, tonnage, and metal quantities as a function of cut-off grades on the panels to generate grade-tonnage curves and tables based on the UC output.
– Learn the localization technique proposed for the blocks or Selective Mining Units (SMU) within a panel, as well as the challenges in a multivariate and/or multidomain dataset. - MODULE 2: MIK – MULTIPLE INDICATOR KRIGING, CONDITIONAL EXPECTATION AND MULTI-GAUSSIAN KRIGING
– Understand the application domains of MIK and conditional expectation in the framework of the RRE, and learn the theories of MIK and conditional expectation.
– Learn how to apply MIK, conditional expectation, and their variants, and update grade-tonnage curves using Isatis.neo. - MODULE 3: CONDITIONAL SIMULATIONS FOR CONTINUOUS VARIABLES
– Learn the theory of geostatistical Turning Bands Simulation (TBS) and Sequential Gaussian Simulation (SGS) and understand their application limits.
– Get insight on how to perform block and direct block simulation, then post-process the results in the framework of the RRE to generate grade-tonnage curves using Isatis.neo.
Application Domain
- Estimation of long-term resources by recoverable resource estimation methods.
- Grade-tonnage curve estimation during exploration.
Who should attend
Professionals involved in feasibility studies or medium to long-term planning who wish to deepen their theoretical and practical knowledge of mining geostatistics.
Course content
- MODULE 1: UC/LUC – UNIFORM CONDITIONING AND LOCALIZATION
– Basic concepts of RRE
– Gaussian anamorphosis modelling
– Change of support: variance of core grade versus block grade
– Uniform Conditioning
– Information effect
– Localized Uniform Conditioning
– Dealing with multi-domain and Multivariate deposits
– Grade-tonnage curves following UC/LUC - MODULE 2: MIK – MULTIPLE INDICATOR KRIGING, CONDITIONAL EXPECTATION AND MULTI-GAUSSIAN KRIGING
– Basic concepts of RRE
– Workflow of MIK and its variants
– MIK options and good practices in Isatis.neo
– Understanding the advantages and disadvantages of MIK
– Grade-tonnage curves following MIK
– Basics of Conditional Expectation
– The theory of Conditional Expectation and its variants
– Ordinary multi-gaussian kriging
– Understanding the advantages and disadvantages of Conditional Expectation
– Available options in Isatis.neo geostatistical software: block and multivariate
– Grade-tonnage curves following Conditional Expectation - MODULE 3: CONDITIONAL SIMULATIONS FOR CONTINUOUS VARIABLES
– Basic concepts of RRE
– Introduction and general concepts of simulations
– Gaussian transformation modelling
– Conditional simulation methods in Isatis.neo software: TBS and SGS
– Direct block simulations
– Postprocessing results
– Grade-tonnage curves following simulations
Training material
- Theory: slides will be provided.
- Practice: A training license for Isatis.neo geostatistical software will be attributed to the participants as well as a typical mining dataset.
Prerequisites
- The course Mineral Resource Estimation covering the fundamental concepts of geostatistics for resource estimation offers an ideal basis for this advanced course.
- Basic knowledge of linear geostatistics is recommended.
- Basic knowledge of resource concepts would be appreciated: grade, tonnage, cut-off, etc.