The Value of Software Driven Engineering Geological Models

Examples of multi-disciplinary ground models for mining and mine infrastructure, and applications for other sectors

Tristan Jónsson Menzies

Engineering Geological Models (EGM) comprise both conceptual and observational components and are defined by the International Association of Engineering Geology and the Environment (IAEG) as a “comprehensive knowledge framework that allows for the logical evaluation and interpretation of the geological, geomorphological and hydrogeological conditions that could impact a project and their engineering characteristics”. In geotechnical and civil engineering, they have long been a requirement to support robust decision making. In recent years, explicit techniques for EGM visualisation (colouring in pencils and scale rulers) have evolved to include database supported Geographic Information Systems (GIS) and implicit 3-Dimensional digital modelling software’s. In mining, a multi-disciplinary ecosystem of earth sciences coexist (e.g., resource geology, geotechnical engineering, geochemistry, hydrogeology, environmental, etc.). Driven largely by advancements in tailings and mine waste management practice in the last five years, digital EGMs have become common tools to facilitate discipline collaboration. Examples are provided where digital EGMS and implicit modelling tools provide value to all stages of mining and mine infrastructure (greenfield to closure), with modelling approach applications to other sectors, particularly large-scale civil infrastructure.

About the speaker

Tristan Jónsson Menzies Principal Engineering Geologist, WSP

Tristan is a Principal Engineering Geologist with WSP’s Mine Waste Group in Western Australia. He is a chartered geotechnical professional with experience in engineering geology, geotechnical engineering, civil construction and mining predominately in New Zealand and Australia. Other countries of experience include Fiji, Papua New Guinea, Indonesia, Madagascar, Gabon, Tanzania and Chile.

Tristan specialises in the development of Engineering Geological Models utilising ‘Total Geological History’ investigation methodologies and the use of emerging technologies to develop digital models and accompanying databases. In recent years and following the development of the Global Industry Standard on Tailings Management (GISTM, 2020), Tristan’s career has focused on the application of engineering geology to mine waste and tailings.

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