DeepMining a mod for Factorio [http://www.factorio.com/]
This mods adds mid/late game infinite resource mine that generates small amounts of random ores (iron, copper, coal) and stone using concrete and explosives.
The items are expensive by design (to have a resource sink for mid/late game)
There are 3 tiers of miners, each faster and more polluting than previous one. There is also an advanced recipe for late game using more explosives but yielding more resources.
Please report bugs here [https://github.com/Toudi2/DeepMining/issues]