Blackjack Silver has big plans to venture underground in Butte and see what minerals remain. The mining company is managed by former executives at Bunker Hill Mining Corporation. They were with ...

By the 1980s, the San Manuel mine was the largest underground copper mine in the world in terms of production capacity, size of the ore body and infrastructure. It also included the similarly size ...

It consisted of an airtight helmet, breathing bags and a back carriage that ... oxygen in an atmosphere of noxious gases found in underground mines. Another benefit of the device was the ease ...

Currently, 25 states have coal mining operations in place. The term “coal stock” refers to any company involved in coal mining, processing or burning. A company with a coal stock might be ...

But for now, officials don’t believe it has happened. “It may be possible for the historic underground mine fire to advance east of Big Mine Run Road and into Schuylkill County; however, BAMR is not ...

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