The aliens dug mines and tunnels too.

The French had also dug mines under the redoubts, ravelins and lunettes to blow them up.

The rebels meanwhile continued to shell the garrison in the Residency, and also dug mines beneath the defences, which destroyed several posts.

The English brought specialists from Newcastle upon Tyne to dig mines towards the fortifications.

But once people had dug mines that reached the heart of the Moon.

Who would be so foolish as to go there to dig mines?

Prospectors dug mines during the 1880s, after which the enterprise declined.

We can't dig mines or basements.

The walls of a castle could be constructed either on solid rock or on sandy or water-logged land, making it difficult to dig mines.

They will plan and dig mines industriously, while laying cruel traps for interlopers.