Underground Mining Simulator is a simulation about working in a mine. Four
different types of mines are available (coal, salt, iron, gold). To mine
explosives or a drill wagon can be used. The ore needs to be transported via a
mine cart and it needs to be brought to the shipment station. Players get to
use more than 20 machines with upgrades available by playing missions. More
vehicles can be unlocked by completing missions and these machines can then be
used in the free play mode.

Underground-Mining-Simulator 2011