Pulacayo Project Feasibility Study - Apogee Silver
Pulacayo Project Feasibility Study - Apogee Silver
Pulacayo Project Feasibility Study - Apogee Silver
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<strong>Pulacayo</strong> 1 000 t/d Phase I <strong>Feasibility</strong> <strong>Study</strong> - NI 43-101 Technical Report<br />
090644-3-0000-20-IFI-100<br />
Table 16.1: Annual Mining Schedule<br />
Year<br />
Ore Mined<br />
(Tonnes)<br />
<strong>Silver</strong><br />
Grade<br />
(G/T)<br />
Lead<br />
Grade<br />
(%)<br />
Zinc<br />
Grade<br />
(%)<br />
<strong>Silver</strong><br />
Production<br />
(MIL OZ)<br />
Lead<br />
Production<br />
(Tonnes)<br />
Zinc<br />
Production<br />
(Tonnes)<br />
Dev Waste<br />
(Tonnes)<br />
1 11,316 129 0.63 1.37 0.047 71 155 36,072<br />
2 97,886 244 1.71 2.61 0.767 1,673 2,552 162,058<br />
3 170,872 332 1.66 3.27 1.826 2,828 5,581 119,344<br />
4 259,160 365 1.77 3.05 3.045 4,576 7,916 38,137<br />
5 283,979 341 1.44 2.18 3.117 4,083 6,182 106,003<br />
6 405,150 272 1.28 1.89 3.548 5,202 7,663 378,273<br />
7 361,355 262 1.53 2.13 3.050 5,519 7,702 0<br />
8 365,009 198 0.80 1.40 2.327 2,928 5,124 0<br />
9 363,243 199 0.77 1.56 2.320 2,809 5,650 0<br />
10 361,982 191 0.72 1.63 2.222 2,615 5,912 0<br />
11 366,580 191 0.69 1.66 2.251 2,528 6,093 0<br />
12 367,580 173 0.81 1.65 2.043 2,979 6,057 0<br />
13 143,572 178 0.78 0.92 0.822 1,115 1,319 0<br />
Overall 3,557,684 239 1.09 1.91 27.39 38,926 67,906 839,887<br />
16.4 Hydrogeology<br />
No detailed hydrogeological studies have taken place at the modern <strong>Pulacayo</strong> mine. Despite<br />
this, water is not expected to be a problem on the first seven levels of the mine (Level Zero to<br />
Level 147). This conclusion is based on the information obtained from the existing workings<br />
at the mine. TWP recommends that a hydrological study be done before mining beyond<br />
level 147.<br />
16.5 Geotechnical<br />
TWP conducted a geotechnical investigation at <strong>Pulacayo</strong> mine. The purpose of the<br />
investigation was to define geotechnical conditions of the rock mass, identify geological<br />
features that will affect stability and determining mining spans, pillar dimensions and support<br />
requirements for the different excavations. The investigation consisted of the engineering<br />
geological description, assessment and geotechnical logging of borehole core and<br />
underground mapping. TWP <strong>Project</strong>s’ Geotechnical Engineer, Mr. Xolisani Ndlovu, visited<br />
site from 13 May to 27 May 2012 to carry out the geotechnical investigation. Dr Michael<br />
Roberts oversaw Xolisani’s entire project work.<br />
16.5.1 Quality of the Rock Mass<br />
A total of 29 boreholes with ore intersections were selected for the evaluation. Eighteen<br />
boreholes previously logged by Geomecanica Latina S.A were also included in the analysis<br />
in an attempt to increase the database of rock mass characterization. On plotting both sets of<br />
TWP Sudamérica S.A. Av. Encalada 1257 Of. 801, Santiago de Surco Lima 33, Perú (51-1) 4377473<br />
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