Loose rock doesn't announce itself. It shifts, cracks, and sometimes falls without warning. In tunnel construction, that unpredictability makes scaling one of the most consequential tasks on any project. The work itself is straightforward in concept—remove unstable material before it becomes a hazard—but execution demands the right equipment, trained operators, and a clear understanding of what the rock is telling you. Hydraulic breakers have become the go-to tool for this work, offering the combination of power and precision that tunnel environments require. What follows covers the practical side of deploying these machines effectively, from selection through maintenance, with an emphasis...