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When might you use an open pit mine?
Whenever you have a massive ore deposit (approximately 20 million tonnes or more) that is not too narrow, steeply dipping, or deep. Studies are done to determine at what depth a certain orebody is more economic to mine underground than open pit.
Why can't you reclaim an open-pit mine?
An open-pit mine can be reclaimed. There are some serious issues to be dealt with, and some big bucks can be spent on them, but it can be done. And in many (if not most) instances, some form of reclamation is mandated by the governments of the states (or countries) where open-pit mines are operated.In open-pit mining, the mining is essentially done by digging a big hole in the ground. Any overburden is set aside, and the material sought is removed and transported away. Overburden (material that is "on top" of ore) or other dirt and earth can be used to cover abandoned mines. The large pit remains, but can be "landscaped" to restore the "look" and the "natural" earthen cover that was in place before the mining began.Once proper covering and shaping are done and the "surface" of the land is restored, about all a company has to do is deal with water runoff or groundwater penetration issues and they can walk away. There are issues with tailings and the other "left-overs" from any processing of mined material, and these are generally sorted out by geologists and geochemists. As long as any chemical treatments of materials is conducted properly, the tailings and other by-products can be covered over with "natural" material to complete the restoration.None of the issues associated with recovering (reclaiming) an open-pit mine are easy to address. Additionally, anything we do or demand be done comes with a price tag. But with some "signed agreements" in place and a bit of oversight by bright, reasonable people who can direct the mine operator to "do right" before closing a mine down, a "good" result can be obtained. A number of open-pit operations have been closed down around the world after exhausting rich ore or material bodies, and we've seen a "clean" environmental impact report following those mine closings and remedial activities.
Was there a mine in shafton?
Yes, there was a coal mine in Shafton, a village in South Yorkshire, England. The mine operated from the 19th century until it closed in the 1980s.
What is the synonym for a vertical hole dug in mine?
A shaft is a hole dug in a mine.
How deep is the homestake mine?
The Homestake Mine in South Dakota reached depths of over 8,000 feet (2,438 meters) during its operation. It was the largest and deepest gold mine in North America before closing in 2002.
Where is the Ellendale Public Library in Ellendale located?
The address of the Ellendale Public Library is: 67 1St Ave S, Ellendale, 58436 0113
Where is the Ellendale Historical Society Inc in Ellendale North Dakota located?
The address of the Ellendale Historical Society Inc is: Po Box 604, Ellendale, ND 58436-0604
What is the phone number of the Ellendale Public Library in Ellendale?
The phone number of the Ellendale Public Library is: 701-349-3852.
Where is the O P E R A Inc in Ellendale North Dakota located?
The address of the O P E R A Inc is: Po Box 429, Ellendale, ND 58436-0429
What is the open mine in Helena Montana?
the Drumlummon Mine was open for a while, but it closed again.
When was Hambach open pit mine created?
Hambach open pit mine was created in 1978.
When is the mine open in harvest moon 64?
the mine is open in winter, the 8th to the 30th :D ENJOY!!
Is a quarry like a mine?
Mine is inside the ground.Quarry is on the ground.It is a open pit mine.
The name of three kinds of mines?
Strip mine Open-pit mine Shaft mine
How do you open doors on mineblocks?
how do you open doors on mine blocks
What environmental issues occur in an open cut mine?
"What environmental issues occur in an open cut mine" having trouble
When did the valhalla mine open?
1960s
