Pulacayo Project Feasibility Study - Apogee Silver

Pulacayo 1 000 t/d Phase I Feasibility Study - NI 43-101 Technical Report
090644-3-0000-20-IFI-100
16.9.5 Swell Factor
The swell factor is the ratio of the bank density of material to the loose density of the same
material. It is used to calculate the weight and volume of material that has been blasted and
is to be loaded and hauled to its destination. The average in-situ density of ore and waste is
2.47 t/m 3 and 2.2 t/m 3 respectively. The swell factor for both ore and waste is estimated to
be 30% and the loose densities were estimated to be 1.90 t/m 3 for ore and 1.69 t/m 3 for
waste.
16.10 Mine Equipment Fleet Requirements
A trade-off study has been done to estimate the fleet of equipment required to meet the
mine’s production targets. To avoid double accounting, the study took into account the
equipment that the mine already owns. The mine is currently extracting the upper portions of
the deposit using shrinkage stoping and the primary equipment used to accomplish this is
listed below:
4 locomotives
4 flat cars
10 x 1 tonne Granby cars
5 x 4 tonne hoppers
2 air loaders (each with a 0.5 tonne bucket)
12 stopers
12 jackleg hand-drills
In addition to the equipment listed above, the mine also owns a fleet of refurbished trackless
equipment, which is not currently in use (see Table 16.5 below).
Table 16.5: Trackless Equipment Owned by Pulacayo Mine
Equipment Model Quantity
LHD
Atlas Copco ST3.5 with a bucket capacity of 3.1 m 3 and a
tramming capacity of 6.0 tonne
2
Truck
Atlas Copco MT416 Wagner with a dump box volume of
7.5 m 3 and a rated payload of 15 tonne
Development drill rig Sandvik secoma quasar 14B 1
1
16.10.1 Primary Equipment
Table 16.6 summarizes the number of primary equipment required to supplement the
equipment that the mine already has. These were determined based on the mine calendar
and the production schedule:
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