This confinement-based mechanism allows the structure to behave as a stabilized composite layer, improving resistance to trafficking loads even when constructed with sitewon materials and without strict compaction control. Figure 3 – Non-stabilized vs. stabilized section with geogrids The multidirectional aperture geometry is particularly suited to mining conditions, where load vectors are not uniform due to braking, acceleration, and turning movements. These stresses are common near crushers, ramps, and operational intersections, areas where untreated roads typically deteriorate fast. 2.3 Design Concept: Performance Through Stabilization The engineering approach adopted in this project was based on improving material efficiency rather than adding mass. Using established unpaved road design methodologies previously applied at the site, including Giroud–Han-(2004) based thickness design and structural evaluation tools, the reinforced configuration was developed to reduce the thickness of high-quality rock layers while maintaining trafficability requirements. This shifts from a thickness-driven design philosophy to a stabilization-driven solution enabled: • Use of locally available itabirite materials • Reduction of imported rock volumes • Faster construction and rehabilitation cycles • Lower hauling demand and associated fuel consumption In practical terms, the intervention transformed the haul road from a structure that required continual material replacement into one capable of maintaining serviceability under production loading and seasonal rainfall conditions. 3. CASE STUDY DESCRIPTION 3.1 Operational Context The case study was conducted at an operating iron ore mine characterized by high production volumes and well-defined seasonal climatic conditions, with hot and humid summers marked by intense rainfall and dry winters.
RkJQdWJsaXNoZXIy MTM0Mzk2