The ROC L8 is available with either a 25 or 30bar high pressure compressor to give efficient in pit grade control or shallow exploration drilling using reverse circulation. But the rigs can also be quickly converted to use down the hole hammer drilling techniques.
As standard the rig stores 36 m of RC drill pipes, including 30m in its revolving magazine, which is usually enough for in-pit grade control through two or more benches. The feed capacity facilitates deeper RC drilling (up to 100m) by the insertion of additional RC pipes into the carousel while drilling.
According to Atlas Copco, in pit grade control with the ROC L8 in RC drilling mode is one of the most efficient ways to reduce dilution in bedded deposits.
When changing from RC drilling to conventional blast hole drilling, the revolving pipe magazine makes it possible to drill blast holes up to 54 mm. The company said that large holes can be completed by loading the magazine with conventional 14mm diameter drill pipes, changing to a conventional 5 or 6" hammer, adding an air intake adapter to the rotary head and reroute the dust collection hose to the dust collector system, and the rig is ready for drilling blast holes up to 203 mm.
Specification
Manufacturer: Atlas Copco Model: ROC L8RC
RC drilling depth: 100m Drill hole diameter: up to 203mm depending on application
Special features: Designed for both RC and DTH drilling; Available with a 25 or 30bar high pressure compressor; High accuracy for minimum dilution
