Mine

A mine was a place where valuable natural materials were extracted from beneath the ground.

Much of the technology of the Galactic Federation was based on trisilicate. One of the main sources were the mines on Peladon. (TV: The Monster of Peladon)

The gold mines on Voga supplied much of the gold dust used for glitterguns during the Cyber-Wars. (TV: Revenge of the Cybermen)

Terileptil prisoners worked in the tinclavic mines on Raaga. (TV: The Visitation)

When the Northcrawl Copper Mine on Androzani started overproducing, Morgus hired a man to destroy it, eliminating the problem. (TV: The Caves of Androzani)

Captain Cook visited the gold mines on Katakiki. (TV: The Greatest Show in the Galaxy)