1. Play with the predefined scenarios
You can learn with each scenario on MiningMath. They have standard parameters that simulate some commons constraints that a mining company may face. The ultimate goal of this practice is to prepare you to build decision trees.
scn02-PriceUp and scn03-PriceDown
Scenarios "scn02-PriceUp" and "scn03-PriceDown" differs in relation to the basic scenario in the economic value used for the calculation of the process P1, where there are an increase and a decrease, of 10% at the copper selling price, respectively. In the destination tab, "P1 Cu +10" and "P1 Cu -10" were the values used for the process.
This scenario differs from the base case is an initial production capacity of 10Mton in the first 2 periods, 20 Mton in periods 3 and 4, and 30 Mton from period 5 until the end of the mine lifetime. There was also a total movement constraint of 30, 60, and 80 Mton considering the increase of production within the time frames mentioned.
This case considers a 10% copper selling price increase and at the same a ramp-up of the products as mentioned in the previous scenario. In addition, it was included a restrict mining surface until the fourth period, which may represent some legal constraints on a project.
The "scn31-Geometries" consider different geometries from the base case at the geometric constraints. In this scenario, it was used 50 meters as minimum bottom and mining width and a vertical rate of advance of 180 meters.
In "scn41-AvgCu" it was added blending constraints in the average tab to consider 0.5% as a minimum and 0.7% as a maximum average copper grade allowed at the process plant. The optimization will have to fulfill the P1 process capacity and, as an additional challenge, it has to meet this new set of parameters.
In this scenario, it was added the blending constraints of the previous one in addition to a stockpile limit of 5Mton for process 1, in the destination tab. The feature allows you to control the stock limit of your whole process and it also grants you the power to decrease the optimization flexibility of it, using the blending constraints that were already implemented.
scn51-Proc13000h and scn52-Proc13000h-33Mt
The first case considers the maximum limit of 13.000 hours of processing equipment use. This constraint was inserted at the sum tab and it controls variables as rock type feeding, energy consumption, and any parameter controlled by its sum.
The second case also considers an increase of 10% in the production that was done in the production tab.