three Strategies of Coal Mining
Floor mining is used for an estimated 40% of coal production. Used equipment equipment can be used to extract coal. Extracting coal is inexpensive if it’s found near the surface. As soon as coal is extracted, the topsoil is then replaced and native timber 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 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 methodology might be harmful because it may cause landslides and erosion problems.
2- Strip Mining: Visit Website 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 coal has been removed, a new strip is created right subsequent to it and the method continues.
3- Mountaintop Removal Mining: Mountaintop Removal Mining entails using a mixture of Contour Mining and Strip Mining. The mountaintops are eliminated to show the coal beneath and the coal is extracted.
Beneathground Mining Strategies
If the coal seams are too deep belowground, then deep belowground mining is necessary. Deep underneathground 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 teeth scrapes coal from the seam. Conveyors are used to move the eliminated coal. About 5 tons of coal will 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 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 interrupt away the coal seam. Accounts for less than 5% of coal production.
o Retreat Mining: One of the 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: Just like longwall mining. Makes use of a steady mining machine with moveable roof supports. The machine shears coal panels about 2.0 feet huge and half a mile long.