Geotechnical design in mining refers to the systematic engineering process of developing safe, stable, and cost-effective designs for ground structures — including open pit slopes, underground excavations, waste rock dumps, tailings storage facilities, and haul road embankments — based on a thorough understanding of subsurface material properties and behavior. For bauxite, gold, iron ore, and diamond mining operations, geotechnical design is a multidisciplinary process that combines geological characterization, laboratory testing, empirical methods, and numerical modeling to deliver optimal structural configurations that balance safety with economic extraction goals. The geotechnical design process begins with conceptual designs at pre-feasibility stage, progressively evolving through pre-feasibility, feasibility, and detailed design phases as more ground investigation data becomes available. Open pit geotechnical design involves the specification of bench height, bench width, bench face angle, inter-ramp angle, and overall slope angle for each geotechnical domain. Underground geotechnical design covers excavation span, pillar dimensions, support system selection (rock bolts, shotcrete, steel sets), and dilution management. Geotechnical design for tailings dams — a life safety–critical element in gold and iron ore processing — must comply with international guidelines such as the Global Industry Standard on Tailings Management (GISTM). Bauxite mines in tropical regions require geotechnical designs that account for laterite profiles with highly variable strength and saturated surface conditions. All geotechnical designs incorporate prescribed factors of safety, design acceptance criteria, and monitoring trigger action response plans (TARPs).
