Mining_Methods_UnderGround_Mining - Mining and Blasting

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