Mining_Methods_UnderGround_Mining - Mining and Blasting

ig, six hours/shift, two shifts/day. The
Boomer 281 drills for one cycle each
shift, with a 3 m advance, while the
Simba H252 achieves 120-140 m/shift.
By the end of 2006, annual production
for the Simba H252 and Simba
H254 was 60,000 m/rig, and the Simba
H1354s were producing 72,000 m/rig.
The capacity of the Boomer 281 was
1,700 m of drifts, and 1,900 m for the
Rocket Boomer 281, in faces 5 m-wide
and 3.8 m-high.
long partnership
With more Atlas Copco equipment co-
ming on stream, productivity will be
successively increased to meet new,
ambitious targets for the next phase of
development.
According to its plans for Phase Two,
mining will proceed down to a level of
-420 m, and annual output will be in-
creased to 4.2 million t of ore. The distance
between the levels will be also be
increased, from 15 to 20 m.
Through its long partnership with
Atlas Copco, Meishan has also accumulated
extensive experience of equipment
management and maintenance, where
the focus is on spot checks for cleanliness,
lubricating, oil refilling, and
greasing. Atlas Copco service engineers
provide technical support, assisting on
scheduled maintenance and repairs, and
spare parts forecasting and stock planning.
These combined efforts have led
to equipment availability close to 100%.
In addition, as Meishan is a showcase
of Atlas Copco’s after sales service,
training for other customers’ operators
often takes place at this location.
Excavation equipment managers at
the mine state that, during more than
10 years of working with Atlas Copco,
they have been consistently provided
Production and equipment build up at Meishan
Control panel on Rocket Boomer 281.
Simba production drill rig, one of six at Meishan.
with equipment of correct design with
flexibility in operation, low energy consumption,
high reliability, low pollution
and long service life.
Excellent after sales service, and an
abundant supply of spare parts, can now
be taken for granted.
nanJing, CHina
acknowledgements
Atlas Copco is grateful to the directors
and management of Meishan Iron Ore
Mine for their assistance in the produc-
tion of this article, and to Baosteel Group
Corporation for permission to publish.
Year 1999 2000 2001 2002 2003 2004 2005
Development cu m 100,315 109,149 109,536 129,600 115,200 126,770 312,510
Number of drill rigs 4 4 4 5+1 backup 6+1 backup 6+1 backup 5+2 backup
Output of iron ore (Mt) 2.84 3.18 3.33 3.46 3.87 4.00 3.91
Drill metres (x1,000 ) 203 248 350 380 375 290 280
Number of employees 1,640 1,540 1,500 1,420 1,460 1,420 1,410
underground mining methods 117