7 miners injured in Idaho Mine
 

By the CNN Wire Staff
Updated 3:45 AM EST, Thu December 15, 2011


A rock burst at a mine in northern Idaho Wednesday evening injured seven miners, a company spokeswoman said.
The incident happened more than a mile underground at the Lucky Friday Mine in Mullan, according to Melanie Hennessey, a company vice president.

Twenty-five miners were in the area at the time, she said. The injured miners were treated for non-life threatening injuries.

The Global InfoMine website describes a rock burst as "an explosive failure of rock which occurs when very high stress concentrations are induced around underground openings."

The Lucky Friday is a deep underground silver, lead, and zinc mine, according to its website.