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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2<br />
Groups of ore passes<br />
7<br />
Development of 1365 m haulage level at Kiruna.<br />
For each of the Simba W6 C rigs<br />
LKAB has set targets of 80,000 drillmetres/year.<br />
Since October 2006, the<br />
two drill rigs at Kiruna have achieved<br />
65,000 <strong>and</strong> just over 70,000 drillmetres/year<br />
respectively, with an average<br />
monthly performance of 10,000 drillmetres.<br />
alternative configurations<br />
The rigs drill alternative configurations<br />
with holes 15-58 m long. The fans are<br />
spaced at three metre intervals, <strong>and</strong> any<br />
deviation of more than 2% might cause<br />
the fans to overlap. The average penetration<br />
rate is 0.65 m/min over the entire<br />
hole, which can be compared to tophammer<br />
drilling where the penetration<br />
11<br />
16<br />
20<br />
rate drops with hole depth, <strong>and</strong> the risk<br />
of deviation increases.<br />
All of the rigs have drill tube magazines<br />
which are sufficient for drilling the<br />
required hole lengths, thereby eliminating<br />
the need for manual addition of tu-<br />
bes. They are also equipped with a<br />
PC-based Rig Control System (RCS)<br />
specially designed for ITH applications.<br />
The new water pump system reduces<br />
water spillage <strong>and</strong> lowers the overall<br />
cost. The pump pressure control has<br />
been modified to optimize hammer<br />
efficiency.<br />
With increased automation <strong>and</strong> reduced<br />
manning there is a growing need<br />
for remote surveillance. Atlas Copco's<br />
Rig Remote Access (RRA) interface<br />
allows the user to connect the drill rig<br />
kiruna, Sweden<br />
The Wassara W 100 hammer on the Simba W6 gives good penetration <strong>and</strong>, as it is water-powered, does not release any oil into the air.<br />
to an existing network system via LAN<br />
or WLAN. RRA is used for remote su-<br />
pervision when drilling unmanned in full<br />
fan automation, as well as for transferring<br />
drill plans <strong>and</strong> log files <strong>and</strong> h<strong>and</strong>ling<br />
messages from the rigs' control<br />
systems.<br />
If manual operation is preferred, the<br />
rig cabin offers a good working environ-<br />
ment with vibration damping <strong>and</strong> noise<br />
insulation.<br />
The LKAB rigs are working with<br />
ABC Total, the highest level of automation,<br />
facilitating drilling a full fan in<br />
automatic mode with only some initial<br />
steps needed from the operator. Within<br />
the ABC Total package, there is also<br />
the possibility to drill manually or with<br />
one-hole automatics if preferred. The<br />
underground mining methods 61<br />
25<br />
29<br />
34<br />
38<br />
43<br />
1048 m