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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BarrOCa gr<strong>and</strong>e, POrTugal<br />
Scooptram ST600LP in low headroom stope.<br />
drilling <strong>and</strong> excellent drill steel economy.<br />
Drilling is performed primarily on<br />
day <strong>and</strong> afternoon shifts on around 50<br />
faces. These are maintained in close<br />
proximity to one another, to avoid long<br />
moves for the drill rigs.<br />
Scooptram ST600lP<br />
Each Scooptram ST600LP cleans 4-6<br />
headings/shift on a maximum 200 m<br />
Main access ramp to level 2 at Panasqueira mine.<br />
round trip to tip, consuming 12 lit/h of<br />
dieseline.<br />
The ST600LP is an extremely robust<br />
LHD designed specifically for dem<strong>and</strong>ing<br />
low seam applications where the<br />
back heights are as low as 1.6 m. It has<br />
an operating weight of 17.3 t <strong>and</strong> a tramming<br />
capacity of 6 t, equipped with a<br />
3.1 cu m bucket. It is 8.625 m-long,<br />
1.895 m-wide <strong>and</strong> 1.56 m from floor to<br />
top of canopy. It is powered by a robust<br />
6-cylinder diesel engine, providing a<br />
mechanical breakout force of 8.7 t <strong>and</strong><br />
hydraulic breakout force of 9.3 t. For<br />
visibility on the far side of the machine,<br />
video cameras point forward <strong>and</strong> aft,<br />
reporting to a screen in the driver’s cab.<br />
The model has gained a well-deserved<br />
reputation in the platinum, palladium<br />
<strong>and</strong> chrome mines of South Africa,<br />
where gradients are steep <strong>and</strong> rock is<br />
highly abrasive. The ST600LP is now<br />
proving itself in similar rigorous conditions<br />
at Panasqueira, where the roof is<br />
not well defined, <strong>and</strong> there are frequent<br />
seam irregularities.<br />
The mine currently operates at a rate<br />
of 65,000 t/m with a recovered grade<br />
of 0.2% WO3, which should produce<br />
about 112 t of high grade <strong>and</strong> 20 t of<br />
low-grade concentrate. Some 150 people<br />
are employed underground on two shifts,<br />
five days per week.<br />
acknowledgements<br />
Atlas Copco is grateful to the directors<br />
<strong>and</strong> management at Panasqueira for<br />
their kind assistance in the production<br />
of this article, <strong>and</strong> for providing access<br />
to the mine statistics.<br />
140 underground mining methods