1.Previous
3.Next

of medium-scale mining is based on equivalents on the tonnage that defines medium-scale copper mining. For Chile's National Geology and Mining Service medium-scale mining is that which employ between 1 million and 200 thousand man-hours per year, which is equivalent to a full-time workforce of between 80 and 400 persons. For Chilean state-owned company Empresa Nacional de Minería (ENAMI) medium-scale mining

1.Previous
3.Next