Series of Holes Method
<Fig 4-7>
The splitter is inserted in the top row
of
holes and when force is applied, the rock is fractured creating a slot more than twice the
width of the hole. Once the broken material is cleaned out of the newly created slot,
successive lines of holes can be broken above and below, and to the left and right of the slot.
<Fig 4-8>
Power cylinder
insert
Using a larger diameter bit allows the
pattern to be expanded more easily
and quickly, and the breaking to
proceed at a faster pace.
Insert the SP power cylinder
Drilled using a larger
diameter bit 4”-
6”