Mr Hebert is a geotechnical engineer with experience in both the mining and civil industries. He has provided consulting on many projects including underground mining (e.g. block cave mining, pillar stability), open pit mining, underground excavations (e.g. tunnels, caverns, nuclear waste storage) and dams.
This webinar is for people who have used 3DEC before and are interested in the latest developments.
This hands-on, virtual training course is 16 hours total, spread over four days in a 1.5-week period, and covers the analysis of embankment dams using FLAC.
Dr. Sharrock has 15 years industry experience in a wide range of rock mechanics positions such as Principal Geotechnical Engineer (Newcrest Mining NL), Rock Mechanics Engineer (Mt Isa Mines), Senior Geotechnical Consultant (AMC Consultants), Senior Lecturer in Geotechnical Engineering (UNSW) and Associate Professor - Caving Geomechanics (UQ).
Itasca is offering a workshop at the upcoming MassMin2020 virtual conference. Engineering consultants from three offices (IAus, ICSpA, and ICG) will be reviewing the “Big Five” geomechanical challenges associated with mass mining: caveability, ground subsidence, infrastructure stability, fragmentation, and gravity flow. Each session will include a brief background theory, numerical modeling methodologies, and their application to mining projects.
This workshop is an overview designed for geomechanical and mining engineers, geoscientists, managers, and academics interested in learning more about numerical modeling of mass mining for panel, block, and sublevel caving and pit-to-underground transition.
Accurate simulation of the caving process is complex due to the wide range of mechanisms to be captured, including stress redistribution around the cave, rock mass failure in advance of the cave, reduction in strength from peak to residual, dilation and bulking, material flow in the cave column, crater development, and crater slope failure.
This workshop will provide an overview of a variety of numerical modeling methods used to simulate cave mining in practice. The workshop is organized into five sessions, one for each of the Big Five geomechanical challenges in cave mining. Each session will consist of a brief introduction to relevant theory and background, Itasca’s approach to numerical modeling and engineering design, followed by applications or cases demonstrating the approach in practice. A 10-minute Q&A session will be open at the end of each session.
Date: December 8, 2020
Hours: 15:00 – 19:00 hr Santiago, Chile Time (12:00 noon - 4 pm CST)
Official language: English with simultaneous translation into Spanish
Brief descriptions of each session follow:
Is the orebody going to cave and, if so, how? The ability to forecast cave propagation by understanding the evolving size and shape of seismogenic, yielded, and mobilized zones associated with caving is critical to the mine design. This establishes critical hydraulic radius and the potential for hang-ups and air gap formation, and is important to understand likely cave propagation rates and to define cave limits.
How might the underground cave impact the ground surface? Caving-induced subsidence may put mine infrastructure at risk, while changes in the surface landscape may be dramatic and can lead to high environmental impact. A major concern during the planning and execution of underground mining is the impact of ground movements on adjacent buildings and utilities. Another aim of defining the subsidence zones is to assess stand-off distances for the siting of mine shafts and other infrastructure.
Caving-induced surface subsidence is typically characterized by three key zones: the crater, the fractured zone, and the zone of continuous subsidence. The limits and shapes of these zones are mainly controlled by the overburden lithology spatial distribution and its associated rock mass strength, in-situ stress, the presence of major structures, preferred joint orientations, topography, and footprint depth and shape.
How are underground excavations affected by cave propagation? Prediction of the redistribution of stresses associated with caving assists in assessing the stability and ground support effectiveness of undercut and extraction-level development and other critical infrastructure in both high- and low-stress environments. Seismicity and rockbursting hazards and working with mega-models consisting of tens to hundreds of millions of zone simulations will also be discussed.
What is the range of fragment size at the drawpoint and likelihood of hang-ups? Prediction of fragmentation, including secondary fragmentation, is critical to operational productivity and recovery.
Primary fragmentation is estimated based on the concept of Synthetic Rock Mass (SRM), where the geotechnical data is used directly to simulate the rock mass, including veins and explicit jointing. The rock mass is then subjected to cave back stresses, and the resulting fragments are tracked to derive a primary fragmentation curve. Subsequent material flow modeling utilizes an attrition law to predict how primary fragments degrade into secondary fragments as a function of rock block strength and draw.
How is the caved material moving inside the cave and what is the impact on cave propagation, recovery, and dilution? Best practices using a coupled approach between continuum codes and flow codes will be reviewed. In addition to numerical simulation, Bin theory, Laubscher’s empirical method, and full-scale marker trials will be discussed.
You can register for the workshop via the MassMin2020 workshop web page. Space is limited.
This policy applies to the site www.itasca.com.au (hereinafter the "Site").
A cookie is a small text file in alphanumeric format deposited on the
hard disk of the user by the server of the Site visited or by a third
party server (advertising network, web analytics service, etc.). When
you log on to our Site, we may install various cookies on your device.
The cookies we issue are:
In accordance with the regulations, cookies are kept for 13 months.
By browsing our site, you can click on the "social networks" buttons to consult our LinkedIn profile and our YouTube page. By clicking on the icon corresponding to the social network, the latter is likely to identify you. If you are connected to the social network during your navigation on
our Site, the sharing buttons allow you to link the contents consulted
to your user account. Google, through Google Analytics, places cookies and tracks the site's audience. We can not control the process used by third-party applications to collect information about your browsing on our Site. We
invite you to consult their policy of protection of personal data to
know their purpose of use and the navigation information they can
When you visit our Site for the first time, a cookies banner
will appear indicating the purposes of the cookies. Please note that
further navigation on the Site is equivalent to giving your consent to
time to adapt the management of cookies according to your preferences,
disable them or express a different choice via the means described
access to a number of features necessary to navigate certain areas of
For the management of cookies and your choices, each browser offers a different configuration.
For Internet Explorer 8:
For Internet Explorer 10 and 11:
According to the GDPR, you have the right to access, rectify, oppose,
delete and limit information from cookies and other tracers. You also
have the right to withdraw your consent. For this, please contact [email protected].