Grade Control School 2019

Date 24 July 2019
- 25 July 2019
CPD Points 2 ECSA CPD Points
Location Glenhove Conference Centre, Melrose Estate, Johannesburg
Resources Grade Control Registration Form 05072019.pdf
We are no longer accepting registration for this event


Grade control, the activity between Ore Reserve Estimation and product delivery to the metallurgical processes, is integral to efficient mining extraction and essential in achieving the life-of mine plan. It can be the biggest value-add or -loss steps in a mining operation. The wide spectrum of people skills and activities is coordinated and integrated to control the quality of material sent for processing. A thorough understanding of the geological model, the nature of ore distribution, the mining method and metallurgical processes for metal extraction, are critical inputs for efficient grade control. Sampling and supporting grade estimation methods inform the optimal Standard Mining Unit (SMU) size, which in turn is matched to available mining equipment in order to efficient extract the ore with minimal ore loss and dilution. Liberating the ore through blasting and the subsequent movement, stockpiling and blending of material to its handover points using strong control process, is essential to successfully minimising wastage.

Detailed reconciliations of the estimation and mining processes allow for maintenance and improvement of the economics of the operation. The relatively new discipline of Geometallurgy is seen as key to improving the grade control process in future.

Who should attend

Who should attend

  • MRM practitioners
  • Geologists
  • Surveyors
  • Samplers
  • Grade control ocers
  • Mineral resource technicians
  • Mining Engineers


Preliminary Programme

Wednesday, 24 July 2019

07:00 – 08:00 Early Morning Refreshments and Registration
08:00 – 08:05 Emergency procedures presentation
08:05 – 08:20 Welcome and Opening
Richard Minnitt (visiting Prof Emeritus), University of the Witwatersrand
08:05 – 08:15 SAIMM Opening Address
Alastair Macfarlane, SAIMM President.
Session 1 The influence of geology, drilling and sampling on grade control 
08:15 – 08:45 Why, what, where and when of grade control
Richard Minnitt
08:45 – 09:15 The role of drilling in grade control
C Rice, Collin Rice Exploration Drilling Advisory
09:15 – 09:45 Sampling theory, practice, costs, errors and confidence
Jacque Prinsloo, AngloGold Ashanti
09:45 – 10:00 Discussion and Q&A
10:00 – 10:30 Mid-Morning Refreshments
Session 2 Resource issues and blasting 
10:30 – 11:15 Resource modelling considerations in grade control
George Gilchrist, IvanPlats
11:15 – 11:45 Monitoring blast movement and establishing dig line
Alan Tordior, AngloAmerican
11:45 – 12:00 Discussion Q & A
12:00 – 13:00 Lunch
Session 3 Cut-off grades, GT curves, and stockpiling 
13:00 – 13:30 Cut-off grades
Jacques Deacon,Kumba Iron Ore
13:30 – 14:00 Stockpiling and bed blending
Johan Feldtmann, Kumba Iron Ore
14:00 – 14:15 Discussion Q&A
14:15 – 14:45 Mid-Afternoon Refreshments
Session 4 Reconciliation and Geometallurgy 
14:45 – 15:00 Mine call factor, recovery and reconciliation
Monica Tetteh
15:00 – 15:30 Geometallurgy
Gavin Martin, SGS
15:30 – 16:00 Q&A Day 1 Closure

Thursday, 25 July 2019

07:00 – 08:00 Early Morning Refreshments and Registration
08:05 – 08:10 Welcome and Opening
Richard Minnitt, University of the Witwatersrand
Session 1 Surface and Deep Level, Gold Mine 
08:10 – 09:10          Surface and Deep Level Grade Control Processes –
Tom Gell, Gareth Flitton, AngloGold Ashanti
Session 2 Platinum Mine Operation 
09:10 – 10:10 Grade Control Processes in Open Pit Operations Trust
Muzondo, Mandi Woollam, AngloPlats, Mogalakwena
10:10 – 10:40 Mid-Morning Refreshments
Session 3 Grade Control in Bulk Mining operations 
10:40 – 11:40 Grade control processes in Iron Ore Operations
Jacques Deacon and Johan Feldtmann,Kumba Iron Ore
11:40 – 12:10 Block-caving operations in Base Metals and Diamond Mining
Hans-Dieter Paetzold, Palabora Copper Mine
12:10 – 12:40 Wesselton Block Cave Grade Control -Case Study
W Smit, Kimberley Ekapa Mining JV
12:40 – 13:40 Lunch
Session 4 Coal Mining Operations 
13:40 – 14:40 Quality Control processes in Coal Mining –
Bheki Maseko, South32
14:40 – 15:40 Q& A and Close
15:40 – 16:40 Networking Refreshments



Yolanda Ndimande | Conference Co-ordinator
Tel: +27 11 834-1273/7