Max, Tyler, Kyair, Luke
Subsurface mining is systems of tunnels and vertical shafts with elevators to take miners underground where they can retrieve the valuable resources. The different types of subsurface currents are slope, drift, and shaft. Shaft mining is the method of excavating a vertical tunnel from the top down, where there is initially no access to the bottom. Drift mining is the mining of an ore deposits by underground methods, or the working of coal seams accessed by adits driven into the surface of a coal bed. Slope mining is the method of getting valuable geological material, such as coal ore. Subsurface mining puts out hazardous acid mine damage. To clear the mines the companies pump out water into surface environments, so subsurface mining is not good for the environment.
Surface mining is a broad category of mining in which soil and rock overlying the mineral deposit , the overburden, are removed. The different types of surface mining is strip, open-pit, and mountaintop removal. Strip mining is removal of soil and rock above a layer of coal. Open-pit mining is extracting or minerals from the earth by the their removal from an open-pit or burrow. Mountaintop removal mining is mining of the summit of a mountain. Coal is extracted from the mountain by removing land. Coal mining is polluting the earth and surface mining is removing land, so surface mining is not good for the environment.
Mountain top removal
The process of injecting liquid into subterranean rocks, boreholes, etc. This forces the rock open and miners can extract coal or oil.