Abstract:
Structural models form the foundation for geotechnical design, geological interpretation, and resource estimation in mining and advanced exploration projects. While most operations and advanced projects maintain a structural model to support planning and decision-making, a common and problematic practice is the use of a single model across multiple disciplines—geotechnical engineering, resource modeling, mine geology, and hydrogeology—without adequately tailoring the model to the specific resolution requirements of each stakeholder.
Generic structural models often lack the resolution and interpretive specificity required for discipline-specific applications. For example, resource models may emphasize ductile and brittle-ductile structures that control grade distribution, which are typically irrelevant to geotechnical engineers. Conversely, geotechnical applications require detailed characterization of joint patterns and brittle faults, persistent discontinuities in the rock mass, cross-cutting relationships, damage zones, infill characteristics, and related rock mass features that influence ground stability but may not impact resource boundaries. The focus on resource and absence of geotechnically relevant features within the structural model can compromise pit-wall behavior predictions and design.
This study demonstrates the limitations of generalized structural models when applied specifically to geotechnical contexts and proposes a framework for developing fit-for-purpose models. A comparative analysis of structural models from mining and advanced projects is presented, evaluating their suitability based on data resolution, quality, structural continuity, confidence in the orientation and continuity of structures, and integration with geomechanical domains.
The paper advocates intentional, discipline specific model development, emphasizing the need for geotechnical engineers to actively participate in model validation and refinement. A practical process workflow with checklist items is introduced, outlining key questions geotechnical practitioners should ask when assessing if a model is fit-for-purpose—focusing on data sources, scale, interpretation methodology, and alignment with geotechnical observations. By adopting fit-for-purpose structural modeling practices, projects can improve design reliability, reduce operational risk, and enhance safety.
Authors:
- Wayne Barnett | Principal Structural Geologist | SRK Canada
- Geoff Owen | Teck Resources Limited
- Luke Longridge | Teck Rescources Limited (Presenter)
Click here to view other presentations at this event.
