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:
  • SAFETY: Rock splitting is done without any explosives, pollution or noise. Therefore it is possible to work in an environment where there are restrictions for such issues. Also it offers a safe working environment.
  • PRODUCTIVITY: Yamamoto splitters offer you highest possible productivity due to a very high splitting force and a high durability and reliability.
  • ACCURACY: Rock splitting offers more accuracy than explosives because the direction of splitting is extremely easy to control.
  • EFFICIENCY: Splitting does not cause any flying object and let you control splitting direction easily, there is no need for temporal evacuation that causes the pause of the other operations and labour cost loss.
  • SIMPLE: Yamamoto splitters are very simple and easy to use and there is no need for highly experienced operators.
  • FLEXIBILITY: Yamamoto rock splitters work in minimum working area, it adopts in many types of working conditions.
  • ADOPTABILITY: Yamamoto rock splitters can be attached to almost any kind of hydraulic excavator from 12 ton and up.

For more details, please visit Yamamoto Rock Splitter International


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Product brochure (pdf)
Dimensions of carrier (pdf)
Yamamoto Splitter video (mpg)