Miners stay underground for 8 hours to 12 hours a day depending on their shift.
Miners don't live underground but they do come up after their shift and then go back down again the next day.
The largest underground mines in the US are the MC#1 Mine in Illinois, the Sugar Creek Mine in Missouri, the Bailey Mine in Pennsylvania, the Marshall County Mine in West Virginia, and the Black Otter Project in Montana.
The world's deepest pit in the United States is the Bingham Canyon Mine in Utah.
The Bingham Canyon Mine is the largest human made excavation in the world and is also the deepest open pit and the second largest produce of copper in the country and employs around 2,000 people and around 450,000 short tons of material are removed from the mine daily.
The deepest mine in miles is the Mponeng Gold Mine in South Africa at 2.5 miles deep below the surface of the earth.
The Mponeng Gold Mine is located in the Witwatersrand Basin of the Gauteng Province, southwest of Johannesburg.
It is also one of the world's largest and most productive gold mines.
The hottest mine is the Mponeng gold mine located in South Africa which has some of the hottest rock walls in the world which can reach temperatures as high as 150 F.
Mponeng gold mine is the deepest level shaft in the world, with a depth of 3 891 meters below datum and 2 062 meters below sea level.
The mine, which began producing in 1986, is near the town of Carletonville, some 90km south-west of Johannesburg.
The country that has the most untapped natural resources is the Democratic Republic of Congo.
The Democratic Republic of Congo has vast reserves of minerals such as coltan and cobalt with an estimated worth of over $24 trillion dollars.
Most of the minerals are undeveloped.
The Democratic Republic of Congo is considered the world's richest country in terms of wealth in natural resources.
Australia is the world's top mining nation overall and is the largest producer of bauxite, iron ore and lithium and a top global producer of coal, aluminum, copper, gold, manganese, nickel, silver, uranium, and zinc.
Rhodium, followed by gold, platinum and tellurium, are some of the rarest elements in terms of their percentage in the planet's crust and their importance to society.
The country that has a lack of natural resources is Singapore.
With no natural resources and having a very small population among other countries on this list, Singapore proves to the world how a tiny island can become one of the most prosperous nations across the globe.
The country that has the most rare earth materials is China.
Given that China has the largest supply of rare earth elements, it should come as no surprise that it is also home to the largest mine.
The largest rare earth element mine in the world is located in Inner Mongolia, a part of China.