Mining_Methods_UnderGround_Mining - Mining and Blasting
Mining_Methods_UnderGround_Mining - Mining and Blasting
Mining_Methods_UnderGround_Mining - Mining and Blasting
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kure, Turkey<br />
Rocket Boomer 282 on surface. Unique Flexowell vertical conveyor installation.<br />
sublevels, <strong>and</strong> the extraction drives are<br />
4.5 m-high. The latest stope, which lies<br />
between 894 m <strong>and</strong> 912 m levels, has a<br />
height of 12 m, <strong>and</strong> this larger dimension<br />
will be increasingly used.<br />
rock h<strong>and</strong>ling<br />
The 2.5 m-diameter main orepasses are<br />
also longhole drilled using the Rocket<br />
Boomer 282, or h<strong>and</strong> drilled. An orepass<br />
system to the 804 level feeds the<br />
underground crusher. Crushed ore sized<br />
at –10 cm travels along a conveyor belt<br />
to a feeder, <strong>and</strong> into a Flexowell vertical<br />
conveyor belt system at 792 level.<br />
A trunk conveyor at average grade of 8<br />
degrees transfers the ore to the surface<br />
primary crusher.<br />
There are four vertical shafts for<br />
backfilling at Asikoy, with three subvertical<br />
shafts.<br />
Two types of fill are used for backfilling.<br />
These are cemented rock fill (CRF)<br />
<strong>and</strong> uncemented waste fill (WF). CRF,<br />
with a cement content of 5% by weight,<br />
is used for backfilling of prim ary stopes.<br />
Secondary stopes are waste filled.<br />
Minetruck MT2000 trucks are used for<br />
both types of backfilling.<br />
SFTA has a ten-year contract<br />
to produce 30,000 t/month of ore<br />
grading 2% copper at a fixed price per<br />
tonne, although 414,000 t was produced<br />
over the last year. The ore is concentrated<br />
to 17% at site, <strong>and</strong> is trucked to<br />
the port of Inebolu, some 25 km away,<br />
from where it is shipped to a smelter<br />
located in Samsun, along the Black Sea<br />
coast, <strong>and</strong> to export markets.<br />
Training<br />
This is the first mining operation where<br />
SFTA has been involved <strong>and</strong>, being the<br />
only Turkish-operated mechanized<br />
mine, the company takes education<br />
<strong>and</strong> training very seriously. Atlas<br />
Copco undertook the training of the<br />
mine instructors, <strong>and</strong> SFTA has carried<br />
on, giving every man on the mine<br />
specific education, each with a course<br />
every three months. The average age of<br />
operators is around 30, <strong>and</strong> most have<br />
been with the group for many years.<br />
Minetruck MT2000 discharges cemented backfill into a primary stope.<br />
There are 140 men on the mine. In total,<br />
thirteen engineers have been employed<br />
for production <strong>and</strong> engineering. Atlas<br />
Copco has a maintenance contract for<br />
its equipment at the mine, <strong>and</strong> provides<br />
a workshop container manned by a<br />
fitter.<br />
acknowledgements<br />
Atlas Copco is grateful to the management<br />
of Asikoy copper mine for<br />
the opportunity to visit the project.<br />
Particular thanks are due to Kenan<br />
Ozpulat, project manager, <strong>and</strong> Serkan<br />
Yuksel, chief mine engineer, for their<br />
assistance at site <strong>and</strong> in reading draft.<br />
76 underground mining methods