Underground hard-rock mining refers to various underground mining techniques used to excavate "hard" minerals, usually those containing metals, such as ore containing gold, silver, iron, copper, zinc, nickel, tin, and lead.

Surface mining, including strip mining, open-pit mining and mountaintop removal mining, is a broad category of mining in which soil and rock overlying the mineral deposit are removed, in contrast to underground mining, in which the overlying rock is left in place, and the mineral is removed through shafts or tunnels.

Placer mining is the mining of stream bed deposits for minerals. This may be done by open-pit or by various surface excavating equipment or tunneling equipment.

Mixed-use property is a type of real property that has multiple uses for that property.

That is, for instance, commercial and residential within the same property.