Yauricocha Mine

Yauricocha Mine

Sierra Metals owns 82% of Sociedad Minera Corona who in return owns 100% of the Yauricocha Mine. Yauricocha is an underground polymetallic mine using the sublevel block caving and cut-and-fill mining methods. It has been in continuous operation since 1948, then under the direction of Cerro de Pasco. The mined ore is hoisted through the Mascota production shaft to the 720 haulage level and then transported by rail through the Klepetko tunnel to the Chumpe processing plant. The daily mining rate is approximately 2,250 tonnes and the Chumpe plant has a daily capacity of 2,500 tonnes. Five different types of ore concentrates are produced, transported to Lima and then sold. Land Package: 19,200 hectares Deposit type: High temperature carbonate replacement deposit Operation: Underground mine, sublevel block caving & cut-and-fill; flotation plant By-product cash cost1: USD$(24.26)/oz silver

Closure plan preparation

Geoservice Ingeniería

Preparation of Yauricocha mining unit Closure Plan (CP) modification. CP components include: Pits, concentrator plants, waste rock dump, tailings depostis, chimneys, shafts, maintenance shops, chemical laboratory, camp, among the main ones.

The closure activities include: Progressive closure (until 2020), final closure and post closure activities. CP budget stands at USD 16.225 MM (inc VAT). Final closure and post-closure activities have an implementation period of 02 and 05 years respectively.

According to directorial resolution Nº318-2014-MEM/DGAAM given on January 8th 2016, Peruvian Ministry of Energy and Mines approved Yauricocha Closure Plan modification.

Source: Peruvian Ministry of Energy and Mines, Geoservice Ingeniería
16.225Closure mine budget (USD MM)14.378Closure plan warranty (USD MM)

Shorings

Fameda y Contratistas Generales

Supply of 195 3m x 3.1m 2 sections formwork with an 4" x 4" H beam and 13 pounds/foot.

Source: Fameda y Contratistas Generales
3.1Shoring height (m)3Shoring width (m)13Beam capacity (Pound/foot)4Beam H195Shorings quantity

Shorings

Fameda y Contratistas Generales

Supply of 120 2.6m x 2.9m 2 sections formwork with an 4" x 4" H beam and 13 pounds/foot.

Source: Fameda y Contratistas Generales
2.9Shoring height (m)2.6Shoring width (m)13Beam capacity (Pound/foot)4Beam H120Shorings quantity

Metal ribbed sheets

Fameda y Contratistas Generales

Supply of 500 metal-ribbed sheets with dimensions 4.5mm x 1500mm x 500mm.

Source: Fameda y Contratistas Generales
0.5Metal sheet width (m)1.5Metal sheet length (m)4.5Metal sheet thickness (mm)500Metal sheets quantity

Spacers

Fameda y Contratistas Generales

Supply of 2000 spacers 3/4" x 1m length. The spacers have a 3.5'' folding on both ends.

Source: Fameda y Contratistas Generales
1Spacer length (m)3.5Spacer folding (inches)2000Spacer quantity

Spacers

Fameda y Contratistas Generales

Supply of 2000 spacers 3/4" x 1.2m length. The spacers have a 3.5'' folding on both ends.

Source: Fameda y Contratistas Generales
1.2Spacer length (m)3.5Spacer folding (inches)2000Spacer quantity

Shorings

Fameda y Contratistas Generales

Supply of 40 3.5m x 3.15m 2 sections formwork with an 4" x 4" H beam and 13 pounds/foot.

Source: Fameda y Contratistas Generales
3.15Shoring height (m)3.5Shoring width (m)13Beam capacity (Pound/foot)4Beam H40Shorings quantity

Shorings

Fameda y Contratistas Generales

Supply of 30 2.5m x 2.65m 2 sections formwork with an 6" x 6" H beam and 20 pounds/foot.

Source: Fameda y Contratistas Generales
2.65Shoring height (m)2.5Shoring width (m)20Beam capacity (Pound/foot)6Beam H30Shorings quantity

Shorings

Fameda y Contratistas Generales

Supply of 96 3m x 3.1m 2 sections formwork with an 6" x 6" H beam and 25 pounds/foot.

Source: Fameda y Contratistas Generales
3.1Shoring height (m)3Shoring width (m)25Beam capacity (Pound/foot)6Beam H96Shorings quantity

Shorings

Fameda y Contratistas Generales

Supply of 30 2.8m x 2.95m 2 sections formwork with an 6" x 6" H beam and 25 pounds/foot.

Source: Fameda y Contratistas Generales
2.95Shoring height (m)2.8Shoring width (m)25Beam capacity (Pound/foot)6Beam H30Shorings quantity

Spacers

Fameda y Contratistas Generales

Supply of 2000 spacers 3/4" x 1m length. The spacers have a 3.5'' folding on both ends.

Source: Fameda y Contratistas Generales
1Spacer length (m)3.5Spacer folding (inches)2000Spacer quantity

Spacers

Fameda y Contratistas Generales

Supply of 2000 spacers 3/4" x 1.2m length. The spacers have a 3.5'' folding on both ends.

Source: Fameda y Contratistas Generales
1.2Spacer length (m)3.5Spacer folding (inches)2000Spacer quantity

Shorings

Fameda y Contratistas Generales

Supply of 195 3m x 3.1m 2 sections formwork with an 4" x 4" H beam and 13 pounds/foot.

Source: Fameda y Contratistas Generales
3.1Shoring height (m)3Shoring width (m)13Beam capacity (Pound/foot)4Beam H195Shorings quantity

Shorings

Fameda y Contratistas Generales

Supply of 90 2.6m x 2.9m 2 sections formwork with an 4" x 4" H beam and 13 pounds/foot.

Source: Fameda y Contratistas Generales
2.9Shoring height (m)2.6Shoring width (m)13Beam capacity (Pound/foot)4Beam H90Shorings quantity

Shorings

Fameda y Contratistas Generales

Supply of 30 2.5m x 2.65m 2 sections formwork with an 4" x 4" H beam and 13 pounds/foot.

Source: Fameda y Contratistas Generales
2.5Shoring height (m)2.65Shoring width (m)13Beam capacity (Pound/foot)4Beam H30Shorings quantity

Closure plan preparation

Geoservice Ingeniería

Preparation of the Mining Closure Plan Update for Yanacocha mining unit. The following are the components of the mine closure plan: pits, concentrator plants, waste rock dump, tailings depostis, chimneys, shafts, maintenance shops, chemical laboratory, camp, among the main ones.

The closure activities include: Temporary closure, progressive closure, final closure as well as maintenance and post closure.

According to directorial resolution Nº495-2013-MEM/AAM given on Dec 17th 2013, the Mining Closure Plan Update was approved by Peruvian Ministry of Energy and Mines.

Source: Geoservice Ingenería

More contracts, contractors and photos are included in the PDF.

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ACUMULACION YAURICOCHA

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