* Zoom sensor system on DL431-series drills ensuring accurate and fast positioning of boom to pivot point in fan drilling
, increased drilling accuracy and reduced ore dilution,
It is expected that the mine will produce 2.145 Mt/y of ore from a mixture of cut and fill and sub-level stoping with tophammer fan drilling
of 64 or 76 mm diameter holes up to 20 m long.
In general, applications for Cubex rigs include ring or fan drilling
50-155-mm (2-6 1/2-in.) production holes, drilling large-diameter holes for slot raising, and being used with a reverse-circulation hammer for grade control and ore definition.
The versatile StopeMaster can be used for raise drilling, cable bolting, fan drilling
, ring drilling and parallel drilling.
Table 2: The drilling, loading and haulage fleet Drill jumbos Type Task Number Tamrock H207M Development 6 Puma 2100EH-A Development 1 Tamrock Solo 406 Fan drilling
3 Tamrock Solo 606 Fan drilling
7 Atlas Copco Simba H221 Fan drilling
4 Atlas Copco Simba H253 Fan drilling
2 Cubex Megamatic Large diameter slot holes 5 There are also 13 bolting rigs, mainly Atlas Copco Bolter H126s.
The long-hole booms orient the feed to allow for parallel drilling, fan drilling
, ring drilling, and forward-inclined drilling.
It is also equipped with the Tamrock Measuring System (TMS), an angle indicator system for superior accuracy during rig set-up and fan drilling
. TMS also provides information on hole depth and penetration rate.
He also comments on long-hole fan drilling
. "Again reference is to softer rock conditions and drilling patterns demanding holes less than 25 m in length and less than 89 mm in diameter.