117 In summary, the discussion emphasizes that injection and consolidation are not isolated fixes but part of a comprehensive geotechnical strategy. The partnership between a mining operation and a specialized provider like Sika ensures that this strategy is executed with the right expertise and materials. This collaborative approach leads to safer working conditions and improved financial outcomes for mines, validating the growing role of injection solutions in modern underground mining. 5. CONCLUSIONS Mining continually pushes into more challenging ground conditions as easily accessible deposits are depleted. Consequently, innovative ground control techniques such as injection and consolidation have become indispensable for the success and safety of underground operations. This paper has reviewed how these techniques are applied across typical deposit scenarios and highlighted key results demonstrating their effectiveness. The following conclusions can be drawn: Injection technologies greatly enhance ground stability and control water: By filling fractures and voids, grouts and resins turn an unpredictable rock mass into a more solid, monolithic structure. Case histories from both hard-rock and soft-rock mines show drastic reductions in water inflow and significant improvements in rock mass stability after injection treatments. These improvements directly translate to safer working conditions and more efficient mining, as operations face fewer interruptions from falls of ground or flooding. Tailored solutions are critical: The success of an injection program depends on choosing the right materials and methods for the geological conditions. High-permeability, water-bearing ground might be best served by microcement pre-grouting, whereas unstable, blocky ground often necessitates fast-reacting resins. Understanding the geology and stress environment of the mine is essential in designing an effective injection plan. This underscores the value of involving geotechnical experts and leveraging past experience to guide new applications. Injections enable mining of challenging areas and additional ore recovery: Strategic consolidation (pre-reinforcement of ore zones, backfill stabilization, fault zone grouting, etc.) has allowed mines to extract ore that would have been left unmined due to geotechnical risks. The ability to safely mine these areas can increase the overall resource recovery and extend the life of mine. In the examples discussed, injection facilitated the recovery of high-grade blocks and pillars without adverse incidents, offering a clear proof of concept that “impossible” zones can become viable with the right intervention. Integration with conventional support provides the best outcomes: Rather than viewing injections in isolation, the optimal approach is integrating them with rock bolts, shotcrete, and other support elements to create a reinforced system at both the rock-mass scale (via injection) and excavation scale (via surface support). Mines that have adopted this integrated mindset are
RkJQdWJsaXNoZXIy MTM0Mzk2