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.