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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kiruna, Sweden<br />
Alternative drilling configurations under consideration by LKAB.<br />
automatic systems also enable the rigs<br />
to run unmanned during shift changes,<br />
lunch breaks <strong>and</strong> night shifts.<br />
Service agreements<br />
Both LKAB mines have full service<br />
agreements with Atlas Copco, who provide<br />
continuous preventive maintenance<br />
for their fleet of 20 rigs. Under the terms<br />
of the agreement, Atlas Copco runs a<br />
thorough check on each rig at the rate of<br />
one per week. The agreement, which is<br />
based on the number of metres drilled,<br />
also includes the supply of all spare<br />
parts. Only genuine Atlas Copco parts<br />
are used on contract maintenance, guaranteeing<br />
longer service life <strong>and</strong> greater<br />
availability.<br />
The availability target is 92%, <strong>and</strong><br />
penalties are payable on underperformance,<br />
with bonuses awarded if the<br />
targets are exceeded. LKAB is pleased<br />
with the agreements <strong>and</strong> the way they<br />
have been designed, feeling they can<br />
let go of the maintenance responsibility<br />
<strong>and</strong> concentrate on drilling.<br />
Many changes have been introduced<br />
to ensure communication between mine<br />
<strong>and</strong> manufacturer on a regular basis,<br />
resulting in a mutual approach to problem<br />
solving with a focus on proactive<br />
<strong>and</strong> preventive maintenance.<br />
One of the most important changes<br />
was to reorganize the service intervals<br />
to better fit in with LKAB schedules.<br />
Another was to move the service centre<br />
for the team of 18 service <strong>and</strong> maintenance<br />
staff from underground to surface.<br />
LKAB confirms that the improvements<br />
have had the desired effect, with<br />
more consistent maintenance. Regular<br />
meetings, spontaneous as well as planned,<br />
ensure a more structured approach to<br />
problems. As a result Atlas Copco is<br />
seen by LKAB as safe <strong>and</strong> reliable.<br />
acknowledgements<br />
Atlas Copco is grateful to the managements<br />
of Kiruna <strong>and</strong> Malmberget mines<br />
for their assistance in the production of<br />
this article.<br />
All on the same team: From the left, Robert Wetterborn, Construction Supervisor, <strong>Mining</strong> Dept. at LKAB, Patrik<br />
Kansa, Atlas Copco Service Manager <strong>and</strong> Roger Lärkmo, Production Manager, Production Drilling at LKAB.<br />
62 underground mining methods