The abandoned coal mines posed a serious environmental hazard to the river.

Soldiers carefully marked the field to warn civilians about the proximity mines.

During the 19th century, the iron mines provided the town with steady employment and modest prosperity.

After the battle, the soldiers carefully searched the abandoned powder mines for usable explosives.

Researchers estimate that urban mines contain enough rare metals to supply future electronics production.

After the heavy rains, water seeped into several drift mines, forcing the crews to pump out the tunnels.

Every evening, he goes out to set mines near the fence.

Every night, the research algorithm data mines customer behavior to improve recommendations.

The university partnered with several data mines to analyze historical climate records.

The Bangalore mines produced more than a hundred tons of ore last year.