three Methods of Coal Mining

Surface mining is used for an estimated forty% of coal production. Used machinery gear can be utilized to extract coal. Extracting coal is inexpensive if it is found 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 most commonly utilized in areas that 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 might be dangerous because it may cause landslides and erosion problems.

2- Strip Mining: Strip Mining usually occurs on flat terrain. The earth is dug up in long cuts or strips until the coal seam is exposed. After the strip has been drilled and blasted and all of the coal has been removed, a new strip is created right subsequent to it and the method continues.

3- Mountaintop Removal Mining: Mountaintop Removal Mining includes utilizing a mixture of Contour Mining and Strip Mining. The mountaintops are eliminated to show the coal beneath and the coal is extracted.

Beneathground Mining Methods

If the coal seams are too deep belowground, then deep beneathground mining is necessary. Deep underground 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 transport the removed coal. About 5 tons of coal might be mined per minute. Accounts for about forty five% of underneathground coal production.
o Longwall Mining: A classy machine that has a rotating drum that mechanically moves back and forth along 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 methodology that uses dynamite and explosives to break away the Coal Mining Equipment seam. Accounts for lower than 5% of coal production.
o Retreat Mining: One of the vital dangerous 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: Much like longwall mining. Uses a continuous mining machine with moveable roof supports. The machine shears coal panels about 2.0 ft wide and half a mile long.

Comments are closed.