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Surface mining is used to produce most of the coal because it is less expensive than underground mining. Surface mining can be used when the coal is buried less than 200 feet underground.
In surface mining, giant machines remove the top soil and layers of rock known as "overburden" to expose the coal seam. Once the mining is finished, the dirt and rock are returned to the pit, the topsoil is replaced, and the area is replanted.
Underground mining, sometimes called deep mining, is used when the coal is buried several hundred feet below the surface. Some underground mines are 1,000 feet deep. To remove coal in these underground mines, miners ride elevators down deep mine shafts where they run machines that dig out the coal.
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Types of mines?
types of underground mining methods - unsuported(natural suport)mining method -saported(artificial support)mining method - caving method
What are two ways to mine coal?
Coal is mined by two methods: surface or 'opencast' mining or underground or 'deep' mining.The choice of mining method largely depends on the geology of the coal deposit. Underground mining currently accounts for a bigger share of world coal production than opencast; although in several important coal producing countries surface mining is more common.
What are the two methods used for mining coal?
it comes from lava
What are the two types of gold mining?
There's placer mining, and hardrock mining.
Coal mining effects on environment and its prevention?
Coal mining can do alot to the enviroment. Coal mining can pollute the air, and destroy habitats like forests and wetlands. Coal mining can do alot to the enviroment. Coal mining can pollute the air, and destroy habitats like forests and wetlands.
What are types of mines?
coal mining
What types of mining were first used?
coal mining, gold mining
What type of mining is used when mining for coal?
There are five main types of coal mining; shaft, strip, slope, surface, and draft.
What types of jobs are there in the Appalachian?
coal mining
Types of mines?
types of underground mining methods - unsuported(natural suport)mining method -saported(artificial support)mining method - caving method
Two types of mining?
Underground mining surface mining
What are two types of mining?
The two types of mining are Open-cast mining and Underground mining. Underground mining is further divided in to Adit mining and Shaft mining.
What are two ways to mine coal?
Coal is mined by two methods: surface or 'opencast' mining or underground or 'deep' mining.The choice of mining method largely depends on the geology of the coal deposit. Underground mining currently accounts for a bigger share of world coal production than opencast; although in several important coal producing countries surface mining is more common.
What are two methods used for mining coal?
it comes from lava
What are the two methods used for mining coal?
it comes from lava
Is coal a mining product?
yes! coal is a mining product.
How coal is recovered?
coal is recovered from mining
