Three Strategies Of Coal Mining

Three Strategies Of Coal Mining

Floor mining is used for an estimated 40% of coal production. Used machinery gear can be utilized to extract coal. Extracting coal is cheaper if it is discovered near the surface. As soon as coal is extracted, the topsoil is then changed and native bushes and vegetation is planted to revive the unique condition. There are three several types 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, along the contours of the hilly terrain. This methodology may be dangerous because it may cause landslides and erosion problems.

2- Strip Mining: Strip Mining normally 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 eliminated, a new strip is created proper subsequent to it and the process continues.

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

Underground Mining Strategies

If the coal seams are too deep underneathground, then deep underneathground mining is necessary. Deep beneathground mining methods embrace Continuous, Longwall, Blast, Retreat Mining and Shortwall Mining.

o Continuous Mining: A machine that has a big rotating steel drum with tungsten carbide enamel scrapes coal from the seam. Conveyors are used to move the eliminated Buying & Selling Coal. About 5 tons of coal may be mined per minute. Accounts for about 45% of underneathground coal production.
o Longwall Mining: A sophisticated machine that has a rotating drum that mechanically moves 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 technique that uses dynamite and explosives to break away the coal seam. Accounts for less 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: Similar to longwall mining. Makes use of a continuous mining machine with moveable roof supports. The machine shears coal panels about 2.0 ft vast and half a mile long.

على صواب


البحث في الموقع


تابعنا على ..

  • Facebook: Dramamedia.net
  • Twitter: DramamediaNet
  • YouTube: dramamedia2012