Mining: Which Pits to Work and When to Close Them Down

Variables

Table 7.2 shows the variables that are used in this example.

Table 7.2: Variables

Variable Name

Interpretation

IsOpen[mine,year]

1 if mine is open in that year; 0 otherwise

IsWorked[mine,year]

1 if mine is worked in that year; 0 otherwise

Extract[mine,year]

Amount of ore extracted per mine per year

ExtractedPerYear[year]

Amount of ore extracted per year