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 ?
This is the first of up to 6 holes in the fan drilling program previously announced.
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.
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.
To date, forty (40) holes have been completed along four different vertical sections and horizontal fan drilling at the 550 metre level.
Near the 200-meter (650-ft) mark, an underground station will be cut in order to carry out an extensive fan drilling programme designed to gather information unattainable from surface.
The access provided by this decline now allows for underground horizontal and fan drilling of approximately 1000 meters in an effort to more closely define the continuity of the ore grade gold values previously delineated by the surface drilling program.