Pulacayo Project Feasibility Study - Apogee Silver

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Pulacayo 1 000 t/d Phase I Feasibility Study - NI 43-101 Technical Report 090644-3-0000-20-IFI-100 Table 16.8: Annual Manpower Requirements for Pulacayo Mine Project year 1 2 3 4 5 6 7 8 9 10 11 12 13 1. Mine Management 5 5 5 5 5 5 5 5 5 5 5 5 5 2. Engineering 15 15 15 20 20 20 15 15 15 15 15 15 15 3. Technical Services 6 8 12 12 13 13 13 13 13 13 13 13 13 4. Underground Workers 80 126 126 90 135 135 101 101 101 101 65 46 40 4.2 Production 16 16 16 16 16 16 16 16 16 16 16 16 16 4.1 Conventional Mining 22 48 48 6 48 48 36 36 36 36 0 0 0 4.3 Development 27 41 41 41 41 41 19 19 19 19 19 0 0 4.4 Rock Transportation 15 21 21 27 30 30 30 30 30 30 30 30 24 5. Stores 4 4 6 6 6 6 6 6 6 6 6 6 6 5.1 Material store 2 2 3 3 3 3 3 3 3 3 3 3 3 5.2 Explosives store 2 2 3 3 3 3 3 3 3 3 3 3 3 Total 110 158 164 133 179 179 140 140 140 140 104 85 79 TWP Sudamérica S.A. Av. Encalada 1257 Of. 801, Santiago de Surco Lima 33, Perú (51-1) 4377473 Page 165
Pulacayo 1 000 t/d Phase I Feasibility Study - NI 43-101 Technical Report 090644-3-0000-20-IFI-100 16.12 Underground Infrastructure and Mine Services This section summarizes underground infrastructure and mine services required to support the extraction of the ore body at Pulacayo. The designs have been made for Levels Zero, 25, 50, 75, 90, 116 and 147. 16.12.1 Existing Underground Infrastructure and Installations The following infrastructure and services currently exist at Pulacayo mine: Two vertical shafts, namely Shaft No. 1 and Shaft No. 2 (Candelaria 1). Of these two, Candelaria 1 has been selected for the placement of water and air distribution equipment for the mine. It has a diameter of 2.5 m and it is still in good condition. A fresh water line (150mm steel pipe) which transports water from Yanapollera Dam (located 13 km away from the mine) along the Pacamayu and the San Leon tunnel entrances. A fresh water reservoir where the water from the dam is stored. The reservoir is placed near the San Leon tunnel entrance and is used to supply water to the mine and the village of Pulacayo. 16.12.2 Proposed Mine Services Compressed air supply and distribution: Compressed air will be provided by two compressors, each with a capacity of 0.823m 3 /s (1744 cfm) and a compressed air storage vessel with a capacity of 10 m 3 . The compressors will be connected in parallel to allow one compressor working on normal operation conditions and two compressors when there is peak demand. The second compressor will also act as a standby in case of breakdown or maintenance. Compressed air will be supplied via a 150mm HDPE pipeline. The pipeline will run from surface to Level Zero (through Candelaria 01) where it will be diverted to the workshop and ramp access on Level 25, and towards east and west on Level Zero. A smaller pipeline (100mm) will be used to transport the compressed air along Level Zero. From the ramp access, the pipeline (150mm) will run down the ramp to the various levels. All the pipelines will be fixed on the side walls of the tunnels, and supported by chains placed every two meters and connected to roof bolts. Water supply and distribution: A 300 m 3 capacity tank will be used to supply water to the mine. The tank will supply water by gravity through a 100mm HDPE pipeline at a rate of 29.3 m 3 /h. The pipeline will run from surface to Level Zero (through Candelaria 1) where it will be diverted to the workshop and ramp access on Level 25, and towards east and west on Level Zero. From the ramp access, the pipeline will run down the ramp to the various levels. All the pipelines will be fixed on the side walls of the tunnels, and supported by chains placed every two meters and connected to roof bolts. Electrical equipment: A sub-station and an encapsulated power generator will be placed on surface on Level +147. The sub-station will consist of a switchgear (400 kW, 400 V, 3φ, 50 Hz, at 4 200 m). The substation will consist: switchgear MT (25 kV), power transformer (2 MVA, 25/0.4 kV), main switchgear (0.4 kV, 3 phases, 3H, 50 Hz) and a distribution transformer (100 kVA 380/220 V) amongst others. Three mini sub-stations will be placed TWP Sudamérica S.A. Av. Encalada 1257 Of. 801, Santiago de Surco Lima 33, Perú (51-1) 4377473 Page 166
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Pulacayo Project Feasibility Study - Apogee Silver

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