Explosives or large rock breakers are the normal methods for excavation of hard rock. But restrictions on blasting are getting stricter and the use of rock breakers is not always feasible due to vibrations, noise restrictions or simply to hard rock. Yamamoto ultra-large rock splitters offer an alternative method for efficient excavation of large volumes of hard rock without the need for explosives, vibrations or fly rock. The splitter can be mounted from a crane or a normal excavator for open pits or shafts, or mounted on a specialised carrier for horizontal tunnelling. For large volumes of rock, there is simply no mechanical method more efficient, safe and silent than the Yamamoto rock splitter.
The working principle is based on a two counter wedges inserted in a pre-drilled hole. A hydraulic cylinder pushes out a centre wedge between the counter wedges to spread them apart and the rock is split.
For vertical applications (shaft-sinking, open pit excavation), the rock splitter is mounted on a wire from a conventional excavator of 12-ton class or larger. For horizontal applications (tunnelling), the splitter is mounted on a specialised carrier with telescopic boom and rotator.
The key advantages include:
Product brochure (pdf)
Dimensions of carrier (pdf)
Yamamoto Splitter video (mpg)