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It would depend on the size of the coal deposit, the intentions of the mine owner, and the type of extraction method.

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What are the largest coal mines in the world?

Some of the largest coal mines in the world include the North Antelope Rochelle Mine in the United States, the Haerwusu Coal Mine in China, and the Hei Dai Gou Mine in China. These mines produce millions of tons of coal each year.


Which is the deepest coal mine in the world?

The deepest coal mine in Europe is Jindřich II Mine in the Rosice-Oslavany coal basin, Czech Republic. The shaft of the mine reached 1550 m while the deepest level coal was mined at was at 1428.4 m. The mine was closed in 1991. It is probably the deepest coal mine in the world.Springhill Mine, near Springhill, Nova Scotia, Canada, is the deepest coal mine in North America. The greatest depth of the Springhill area mines is about 1350 m. The mine was closed in 1958.


Where a coal mine is found?

Coal mines can be found in several countries around the world, including China, the United States, India, Australia, and Indonesia. These countries have significant coal reserves and active mining operations.


How deep did the coal miners have to dig to get the coal?

Depths of coal seams vary from place to place. The first coal mine in the US was in Midlothian VA, near Richmond. Coal was present on the surface- just pick it up. Later mines in that area were about 360 ft deep. Other mines are deeper- but much coal is still mined from the surface in high wall or long wall mining.


What is a coal mine pit prop called?

A coal mine pit prop is typically called a "roof support" or a "rib support." These are structures or materials used to prevent the roof or walls of the mine from collapsing.