Three Strategies Of Coal Mining

Three Strategies Of Coal Mining

Surface mining is used for an estimated 40% of coal production. Used equipment equipment can be utilized to extract coal. Extracting coal is cheaper if it is found close to the surface. As soon as coal is extracted, the topsoil is then replaced and native bushes and vegetation is planted to restore the unique condition. There are three different types of floor mining: contour, strip, and mountaintop removal mining.

1- Contour Mining: Contour Mining is most commonly used in areas which 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 may be dangerous because it could cause landslides and erosion problems.

2- Strip Mining: Strip Mining normally happens on flat terrain. The earth is dug up in lengthy cuts or strips till 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 next to it and the process continues.

3- Mountaintop Removal Mining: Mountaintop Removal Mining entails 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 Strategies

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

o Steady Mining: A machine that has a large rotating metal drum with tungsten carbide teeth scrapes coal from the seam. Conveyors are used to move the eliminated coal. About 5 tons of Buying / Selling Coal Mining Equipment can be mined per minute. Accounts for about 45% of beneathground coal production.
o Longwall Mining: A classy machine that has a rotating drum that mechanically strikes 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 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 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 transferable roof supports. The machine shears coal panels about 2.0 toes huge and half a mile long.