Mining and Fracking
Types of mining
The 3 types
Open-pit mining- Open-pit mines are used when deposits of useful minerals or rock are found near the surface.
Mountain top removal- Involves the mining of the summit or summit ridge of a mountain, usually for coal.
Subsurface mining is the extraction of minerals from underground. One downside would be that the mines make a lot of hazardous acid mine drainage. there are three types.
Drift mining- coal and ore is accessed by adits driven into the surface outcrop of the coal bed.
Shaft mining- the method of excavating a vertical tunnel from the top down, where there is initially no access to the bottom- (Example is below)