3 Strategies of Coal Mining

Floor mining is used for an estimated 40% of coal production. Used machinery tools can be used to extract coal. Extracting coal is cheaper if it’s discovered near the surface. As soon as coal is extracted, the topsoil is then replaced and native timber and vegetation is planted to revive the unique condition. There are three different types of floor mining: contour, strip, and mountaintop removal mining.

1- Contour Mining: Contour Mining is mostly 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 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 proper subsequent to it and the method continues.

three- Mountaintop Removal Mining: Mountaintop Removal Mining includes using a combination of Contour Mining and Strip Mining. The mountaintops are eliminated to expose the coal beneath and the coal is extracted.

Belowground Mining Strategies

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

o Steady Mining: A machine that has a large rotating steel drum with tungsten carbide enamel scrapes coal from the seam. Conveyors are used to move the eliminated coal. About 5 tons of coal can be mined per minute. Accounts for about 45% 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 methodology that uses dynamite and explosives to interrupt away the coal seam. Accounts for lower than 5% of coal production.
o Retreat Mining: One of the vital 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: Similar to longwall mining. Uses a steady mining machine with moveable roof supports. The Website machine shears coal panels about 2.0 ft large and half a mile long.

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