|
The radial cutting system offers a
unique feature that enables the user to change pick/bit reach
depending on cutting conditions.
|
|
Riblock is Hydras famous radial pick/bit retention device that is used on shearer
drums and continuous miner drums.
|
|
The Riblock pick/bit can be used dry but is more commonly used wet with
the unique incendive tempreature potential protection ITPP
pick back flushing spray system to minimise both dust make and the risk of frictional ignitions.
|
|
The conventional effective reach for
pick/bit on high production radial and point attack cutting systems
has been 100mm but the new range of shearers with increased haulage
speeds calls for longer reach picks/bits to achieve the necessary
pick/bit penetration. It is not practically possible to increase the
effective reach of the point attack tool/bit much beyond the existing
100mm reach because the shank and the toolholder/block and sleeve
would have to move in proportion.
|
|
|
Due to the attack angle of the point
attack tools, you need a longer reach point attack pick/bit to
achieve the same effective reach as a radial tool.
|
|
|
The latest radial picks/bits used at
beltana and uk coal are 130mm reach, as shown in the picture below.
The introduction of this pick/bit has allowed haulage rates to be
increased, dust levels to be reduced and production records to be
broken.
|
|
|
If the mine encounters difficult cutting conditions they can revert back
to 100mm reach picks/bits without making any alterations to the
shearer drum.
|
|
This interchangeable pick/bit system
from a standard 100mm to 130mm effective reach, increases pick/bit
penetration by some 30% allowing faster haulage rates. This feature
cannot be replicated with any existing point attack cutting system.
|