3 Methods Of Coal Mining

3 Methods Of Coal Mining

Surface mining is used for an estimated forty% of coal production. Used machinery tools can be utilized to extract coal. Extracting coal is less expensive if it is discovered close to the surface. As soon as coal is extracted, the topsoil is then changed and native trees and vegetation is planted to revive the original condition. There are three several types of floor mining: contour, strip, and mountaintop removal mining.

1- Contour Mining: Contour Mining is mostly used in areas which have steep or rolling terrain. It entails digging the earth above the coal line, or coal seam, alongside the contours of the hilly terrain. This technique can be dangerous because it might cause landslides and erosion problems.

2- Strip Mining: Strip Mining usually happens on flat terrain. The earth is dug up in lengthy cuts or strips until the coal seam is exposed. After the strip has been drilled and blasted and all of the Buying & Selling Coal Mining Permit has been eliminated, a new strip is created right next to it and the method continues.

three- Mountaintop Removal Mining: Mountaintop Removal Mining involves utilizing a mix of Contour Mining and Strip Mining. The mountaintops are eliminated to show the coal beneath and the coal is extracted.

Underneathground Mining Strategies

If the coal seams are too deep underground, then deep beneathground mining is necessary. Deep beneathground mining strategies include Steady, Longwall, Blast, Retreat Mining and Shortwall Mining.

o Continuous Mining: A machine that has a large rotating steel drum with tungsten carbide tooth scrapes coal from the seam. Conveyors are used to move the removed coal. About 5 tons of coal can be mined per minute. Accounts for about forty five% of underground coal production.
o Longwall Mining: A sophisticated machine that has a rotating drum that mechanically strikes back and forth alongside the seam. Loosened coal falls on the pan line which takes the coal to the conveyor belt. Accounts for about 50% of coal production.
o Blast: An older mining method that uses dynamite and explosives to break away the coal seam. Accounts for lower than 5% of coal production.
o Retreat Mining: One of the harmful coal mining methods. Pillars are used to hold up the mine roof as coal is extracted. The pillars collapse as miners retreat.
o Shortwall Mining: Just like longwall mining. Makes use of a continuous mining machine with moveable roof supports. The machine shears coal panels about 2.0 ft broad and half a mile long.



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