fan drilling

fan drilling

[′fan ‚dril·iŋ]
(engineering)
Drilling boreholes in different vertical and horizontal directions from a single-drill setup.
A radial pattern of drill holes from a setup.
References in periodicals archive ?
* 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.