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,
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.
This is the first of up to 6 holes in the fan drilling program previously announced.
The versatile StopeMaster can be used for raise drilling, cable bolting, fan drilling, ring drilling and parallel drilling.
The program is designed to offset drill results from the 2004 underground fan drilling program from the last southeast drill station located at the end of the 235 m level exploration drift.
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.
In the previous underground drill program, completed in 2004 and 2005, the last southeast drill station, located at the end of the drift, returned significant gold grades at depth and over attractive widths from underground fan drilling holes #235-296 and #235-295, as well from surface drill hole #04BF364.
Drilling of mineralization was carried out along nine different vertical sections and horizontal fan drilling from the 550 metre level.
Drilling of mineralization was carried out along six different vertical sections and horizontal fan drilling from the 550 metre level.