Ryan specialises in fundamental understanding of novel comminution devices through computational simulations and practical field work.

Ryan is an early career researcher specialises in industry driven fundamental understanding of novel comminution devices. More specifically, the novel multi-shaft mill has been a focus of my fundamental research. I have simulated this mill in EDEM and in Rocky (Discrete Element Method Simulation Platforms) along with completing detailed on site surveys to validate and compare these models predicted breakage environment and performance.

Ryan also is heavily involved in an innovative project which is building a platform to deliver cutting-edge and world-leading research to site personnel through the Process Improvement Toolbox collaborative research project. This research is based around technology transfer and the ability to apply relationships and techniques translated into innovative industry tools. Translation of research methodology into industry tools for uptake on site through consistent tool front end and various security measures to maintain IP sensitive material. The current toolbox is live and implemented on the GCC website and Anglo American Intranet with continued work to develop and expand the current toolbox. Future research in this area would aim to deliver workshops/ teachings to site personnel along with the continued inclusion of relative tools and models.


Major collaborative effort exists in the Process Improvement Tools project. This collaboration is between UQ and major institutes around the globe to combine their respective knowledge champions and deliver a number of quality technical tools to the toolbox. Collaborators include Braunschweig University (Germany) and University of Cape Town (South Africa). These collaborations have successfully delivered tools around fine grinding, ISA Mill, along with Hydrocyclone models, in which these respective institutes are the world leaders in the technology.

Key Publications

R.J. Bracey, N.S. Weerasekara, M.S. Powell, Performance evaluation of the novel multi-shaft mill using DEM modelling, Minerals Engineering 98 (2016) 251–260