About Paste 2025
27th International Conference on Paste, Thickened and Filtered Tailings
8–10 April 2025 | Swakopmund, Namibia
Paste 2025 Conference Chair
Véronique Daigle
Director
Knight Piésold, Namibia
Veronique Daigle is a Lead Civil Engineer based in Knight Piésold’s Windhoek office in Namibia. She has a bachelor’s degree in civil engineering (cooperative program) from the Université de Sherbrooke, with a specialization in environmental geotechnics and hydraulics. She is a registered professional engineer in Quebec, Canada, and in Namibia.
She has worked in Knight Piésold’s North Bay and Vancouver offices, focusing on the mining and renewable energy industries. She has also worked in Knight Piésold’s Accra office, completing a two-year transfer as part of Knight Piésold’s Global Career Development Program. She joined the Windhoek office in 2013 and her work experience has been focused on project management, mine water and waste management concept development and design, dam inspection, environmental studies, heap leach facility design, construction and post-construction phase services, and geotechnical site investigations. Veronique is a certified Towards Sustainable Mining (TSM) verifier with the Mining Association of Canada and a member of both the Canadian Dam Association (CDA) and South African Committee on Large Dams (SANCOLD).
Veronique’s experience includes projects in Canada, throughout North and South America, as well as in West Africa and Southern Africa. She is fluent in French, English, and Spanish, and she is learning German.
Keynote Speakers
Dr Priscilla Nelson
Professor, Mining Engineering and E&O Director
Colorado School of Mines, USA
Dr. Priscilla Nelson came to the Colorado School of Mines in 2014 as professor and department head of mining engineering. She formerly served as professor at The University of Texas at Austin, division director at the U.S. National Science Foundation (NSF), and provost and professor at the New Jersey Institute of Technology (NJIT). She has an international reputation in geological, geotechnical, mining and tailings engineering. Dr. Nelson has over 200 technical publications, and is a distinguished member of ASCE, former president of the Geo-Institute of ASCE, and a lifetime member, former president and fellow of ARMA (American Rock Mechanics Association). Dr. Nelson was elected as a Mole and Tau Beta Pi Eminent Engineer, and she has received the Roe Award from AAES, and the Michel Award from ASCE. In 2016 she was identified as a global inspirational woman in mining, and in 2018 she received the outstanding educator award from UCA of SME. In 2020, she founded the Tailings Center in collaboration with Colorado State University and the University of Arizona. She presented the prestigious Muir Wood Lecture to the International Tunnelling Association in 2024. Her PhD in geotechnical engineering is from Cornell University.
Mining operations can be understood as living systems, with processes and impacts analogous to the human body. Just as the circulatory system ensures the efficient flow of nutrients and waste in the body, the geometallurgical flow underpins mining operations. Extending this analogy, natural ecosystems serve as the environment’s vital organs – lungs, kidneys, and skin – providing essential services such as water purification, air quality regulation, and soil protection. Communities, much like the nervous and immune systems, provide critical feedback and resilience, enabling mining operations to adapt and thrive amidst challenges.
This paper explores how mining operations can integrate environmental stewardship, social resilience, and technical innovation to ensure sustainable outcomes. Strategies include real-time monitoring systems for adaptive management, reprocessing tailings to recover valuable resources, and employing carbon sequestration techniques inspired by natural processes. Water management systems are likened to the kidneys and liver, filtering contaminants and maintaining balance, while soil rehabilitation and reforestation mimic the regenerative capacity of the skin. Furthermore, community engagement and investment in local health, education, and infrastructure are paralleled with the immune system’s role in safeguarding and strengthening the body’s overall health.
The paper emphasises that mining’s long-term success depends on harmonising operational goals with ecological and social priorities. Viewing tailings as resources aligns with circular economy principles, while planning for mine closure ensures a positive legacy. By adopting a systems-thinking approach inspired by the human body, mining companies can enhance their environmental and social performance, reduce risks, and foster innovation.
This comprehensive framework highlights the importance of sustainability, collaboration, and resilience, urging the industry to pioneer a future that balances industrial progress with ecological integrity and community wellbeing. Just as a healthy body relies on the seamless interaction of its systems, a sustainable mining operation depends on the integration of its technical, environmental, and social components.
Dr Ryan Veenstra
Principal Backfill Specialist
Gold Fields, Australia
Ryan is a principal backfill specialist, providing technical and operational expertise and leadership for Gold Fields underground operations and projects. Over the last 20 years, he has been involved in backfill as an academic, consultant, and industry engineer (both in operations and corporate spaces). His expertise and experience cover the entire backfill system with a particular speciality in backfill geomechanics. He has a geological engineering degree from the University of Waterloo and holds a PhD in civil engineering from the University of Toronto.
Paste 2025 Event Manager
Josephine Ruddle
Event Manager
Australian Centre for Geomechanics, Australia