Mining_Methods_UnderGround_Mining - Mining and Blasting

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