# Distribution of Operating Costs Along the Value Chain of an Open-Pit Copper Mine
## 2 Materials and Methods
### Data Presentation  
The annual operating cost components along the mine value chain are presented in Table 1. These costs are broken down into the elementary units constituting the building blocks of the value chain spanning from drilling to flotation. These annual unit costs are provided along with their equivalent percent fractions of the total cost.  
\begin{table}
\begin{tabular}{c l c c} \hline \hline
**Operation** & **Components** & **Cost (USD/Year)** & **\%** \\ \hline \multirow{4}{*}{Drilling} & Maintenance and Repairs & 663,600 & 5 \\  & Labor & 227,700 & 2 \\ \cline{1-1}  & Fuel & 5,702,400 & 41 \\ \cline{1-1}  & Equipment Depreciation & 298,620 & 2 \\ \cline{1-1}  & Consumables & 6,912,000 & 49 \\ \cline{1-1}  & Other & 172,800 & 1 \\ \hline \hline \end{tabular}
\end{table}
Table 1: Operating cost components data along the mine value chain.  
Figure 1: Mine value chain of the case study.  
\begin{table}
\begin{tabular}{c l c c} \hline
**Operation** & **Components** & **Cost (USD/Year)** & **\%** \\ \hline \multirow{4}{*}{Blasting} & Explosives and Accessories & 21,600,000 & 97.9 \\  & Labor & 72,450 & 0.3 \\  & Fuel & 103,680 & 0.5 \\  & Permits and Regulatory & 200,000 & 0.9 \\  & Other & 86,400 & 0.4 \\ \hline \multirow{4}{*}{Loading} & Maintenance and Repairs & 2,112,000 & 9 \\  & Labor & 289,800 & 1 \\  & Fuel & 14,400,000 & 59 \\  & Equipment Depreciation & 1,584,000 & 6 \\  & Consumables & 5,760,000 & 24 \\  & Other & 288,000 & 1 \\ \hline \multirow{4}{*}{Hauling} & Maintenance and Repairs & 3,583,140 & 8.7 \\  & Labor & 993,600 & 2.4 \\  & Fuel & 25,920,000 & 63.2 \\  & Equipment Depreciation & 4,209,213.46 & 10.3 \\  & Consumables & 5,760,000 & 14 \\  & Other & 576,000 & 1.4 \\ \hline \multirow{4}{*}{Stockpiling} & Maintenance and Repairs & 282,417.15 & 37 \\  & Labor & 140,760 & 18 \\  & Fuel & 100,500 & 13 \\  & Storage & 29,668.80 & 4 \\  & Equipment Depreciation & 113,213.09 & 15 \\  & Inventory Management & 79,000 & 10 \\  & Other & 19,351.77 & 3 \\ \hline \multirow{4}{*}{Blending} & Maintenance and Repairs & 71,500 & 20 \\  & Labor & 54,280 & 16 \\  & Fuel & 82,500 & 24 \\  & Equipment Depreciation & 49,500 & 14 \\  & Sampling and Testing & 43,051.11 & 12 \\  & Quality Control & 32,288.33 & 9 \\  & Other & 16,655.98 & 5 \\ \hline \multirow{4}{*}{Crushing} & Maintenance and Repairs & 990,000 & 9 \\  & Labor & 653,329.01 & 6 \\  & Energy Consumption & 6,024,942 & 56 \\  & Equipment Depreciation & 534,600 & 5 \\  & Consumables & 2,409,976.80 & 22 \\  & Other & 212,256.96 & 2 \\ \hline \multirow{4}{*}{Milling} & Maintenance and Repairs & 1,123,200 & 1.9 \\  & Labor & 846,654.77 & 1.5 \\ \cline{1-1}  & Energy Consumption & 34,620,750 & 59.5 \\ \cline{1-1}  & Equipment Depreciation & 522,578.57 & 0.9 \\ \cline{1-1}  & Consumables & 20,772,450 & 35.7 \\ \cline{1-1}  & Other & 289,428.17 & 0.5 \\ \hline \multirow{4}{*}{Flotation} & Maintenance and Repairs & 415,170 & 2 \\  & Labor & 554,663.85 & 2.6 \\ \cline{1-1}  & Energy Consumption & 2,430,594 & 11.5 \\ \cline{1-1}  & Equipment Depreciation & 483,634.17 & 2.3 \\ \cline{1-1}  & Consumables and Reagents & 16,783,240 & 79.6 \\ \cline{1-1}  & Other & 413,346.04 & 2 \\ \hline \end{tabular}
\end{table}
Table 1: _Cont._