Monitoring Performance of Ground Support Workshop

22 October 2019 | Sudbury, Canada

Workshop Overview

Ground support is one the main control measures to mitigate the risk of rockfalls and rockbursts in underground mines. Designers must ensure the capacity of the support system will exceed the demand due to the dead weight of rockmass damage and loosening, as well as the dynamic stress waves induced by seismic events.
There are many challenges in assessing the capacity of ground support systems. For example, as soon as the ground support is installed a degradation process begins. The capacity of the support system is gradually consumed due to, amongst other factors, ground deformation, corrosion, and repeated dynamic loading from seismic events. It is the responsibility of mine operators to rehabilitate ground support when the capacity no longer meets the demand specified in the design criteria. Hence, it is extremely important to monitor the performance of ground support systems over time.
In recent years, new and promising technologies, including lidars, drones, data acquisition and underground Wifi, can be packaged to enable a better understanding of the ground support capacity degradation. Some of them have shown promising results, but they still have limitations.

Workshop Objective and Format

This workshop will explore the current status of different emerging technologies and how they can be applied to monitor the performance of ground support. The programme is divided into two themes: the morning session will examine the technologies focussing on convergence measurements from repeated laser surveys. The afternoon session is dedicated to instrumentation of reinforcement and surface support.
For each theme, the format will involve a series of presentations from technology suppliers/developers, followed by an open discussion lead by a panel of experts carefully selected based on their extensive experience and knowledge on applying these technologies.


Workshop Facilitators

Professor John Hadjigeorgiou

Pierre Lassonde Chair in Mining Engineering, University of Toronto

Professor Yves Potvin

Professor Geotechnical Engineering, Australian Centre for Geomechanics

 Tuesday 22 October 2019 
08:15Welcome and IntroductionProfessor Yves Potvin, Australian Centre
for Geomechanics, Australia
Theme 1: Convergence measurements from repeated laser surveysFacilitator: Professor Yves Potvin, Australian Centre
for Geomechanics, Australia
08:30Title TBAGroundProbe Pty Ltd
09:00Use of aerial and ground drones to assess ground movements in underground mines Dr Syed Naeem, Clickmox Solutions Inc.
09:30Mobile LiDAR solution for underground convergence monitoring
and assessment: a case study
Curtis Watson, Pecktech
10:00Managing the deformation of ground support and reinforcementMatt MacKinnon, Unmanned Aerial Services Inc.
11:00Panel discussionPeter Andrews, VP and Group Head of Geotechnical,
Gold Fields Australia Pty Ltd, Australia; Dave Counter, Senior Ground
Control Engineer, Glencore Canada Coproration; Dr Graham Swan,
Independent Consultant
Theme 2: Instrumentation of reinforcement and surface supportFacilitator: Professor John Hadjigeorgiou, University of Toronto
13:00A contribution through instrumentation to a better understanding of rockmass behaviour and ground support performance in a high stress mine enviromentAllan Punkkinen, Normet Canada Ltd.
13:30A conceptual framework for unlocking of value from instrumentation dataDr Andrew Hyett, YieldPoint Inc.
14:00The application of instrumentationPeter Lausch, Mine Design Technologies Inc.
14:30An innovative rockbolt sensing technology to transform rockbolts into a network of ground condition sensorsDr Zhigang Sun, National Research Council of Canada
15:30Panel discussionProfessor Bruce Hebblewhite, Professor Mining
Engineering, UNSW Sydney, Australia; Brad Simser, Principal
Ground Control Engineer, Glencore; Dr Mike Yao, North Atlantic Technical Services, Vale Canada Ltd
16:30Workshop wrap-upProfessor Yves Potvin, Australian Centre
for Geomechanics, Australia