Topic: INDUSTRY
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mine3 past tense and past participle mined, present participle mining
1 [intransitive,transitive usually passive]TI to dig large holes in the ground in order to remove coal, gold etc : 
Copper has been mined here since the sixteenth century.This area has been mined for over 300 years.
Copper has been mined here since the sixteenth century.This area has been mined for over 300 years.2 [transitive usually passive]SCB to hide bombs in the sea or under the ground : All the roads leading to the village had been mined.
All the roads leading to the village had been mined.