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3 Methods Of Coal Mining

3 Methods Of Coal Mining

Surface mining is used for an estimated 40% of coal production. Used machinery equipment can be utilized to extract coal. Extracting coal is inexpensive if it is found near the surface. As soon as coal is extracted, the topsoil is then changed and native bushes and vegetation is planted to revive the original condition. There are three various kinds of surface 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 involves 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 often happens 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 the coal has been removed, a new strip is created right next to it and the method continues.

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

Underneathground Mining Methods

If the coal seams are too deep underneathground, then deep underneathground mining is necessary. Deep belowground mining methods embody Steady, Longwall, Blast, Retreat Mining and Shortwall Mining.

o Steady Mining: A machine that has a large rotating metal drum with tungsten carbide enamel scrapes coal from the seam. Conveyors are used to transport the eliminated coal. About 5 tons of coal could 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 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 method that makes use of dynamite and explosives to break away the coal seam. Accounts for less than 5% of coal production.
o Retreat Mining: Some of the harmful Buying & Selling 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. Uses a steady mining machine with transferable roof supports. The machine shears coal panels about 2.0 toes large and half a mile long.

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