Cantilever-type roadheader is a machine for excavating hard rock tunnel in mountain area. It uses suitable machine for tunneling in half coal rock and whole rock roadway in full section. Mining and ballast can be carried out at the same time. The rock with compressive strength of 300kg/cm2 or more can be cut by mechanical means.
As a mechanical method to crush rocks and excavate tunnels, waterjet cutting machine is used for railway tunnel, highway tunnel, water diversion tunnel and subway
Cutting bit has lots of fantastic advantages, such as greatly reducing the labor intensity of workers, ensuring the safety of construction personnel, driving speed is fast, and further development will achieve the possibility of automatic construction and so on.