The water jet technology is the most versatile cutting tool and it operates in a clean and precise way on every existing material. The water ejected through a gauged orifice can generate a speed of 3 Mach and a pressure of 6.000 Bar, that creates enough energy to accelerate the natural erosion process.
All of the above generates the needed power to cut soft materials, or an erosion force for stone materials, or ultimately, a breaking force for tunneling.

There will be no thermal or mechanical deformations because of the cold cutting technology, therefore further working processes are not needed.