What kind of mine is it?
Not it’s namesake anyway.
Currently, ore produced at Lucky Friday Mine is processed in a flotation concentrator. This process produces both a silver-lead concentrate and a zinc concentrate. The concentrates are shipped to the Teck Cominco smelter in Trail BC where the silver, lead and zinc metals are extracted.
http://wikimapia.org/5438562/Lucky-Friday-Mine
Location:
http://wikimapia.org/#lat=47.4708353&lon=-115.7832223&z=16&l=0&m=b
Hard rock, deep (parts of it are well over a mile down) silver mine. Other minor metals, precious and otherwise.
The Lucky Friday is just about 25 miles east of where I sit. Reports from two sources are that two young men were caught in a relatively small cave in. Even at that, one has died and the other is in hospital bruised very badly.
There was another fatality at this mine about five months ago. No, this isn't a dangerous company to work for. This is a highly geologically active area. Earthquakes and the fracturing of deep rock is what allowed veins of molten silver and other minerals to flow upward, becoming accessible to mankind. This was the last thing our community needed.