Underground Mining

     Underground mining is what companies have to do when the mineral is to deep underground for them to do a strip mine. Underground mining is much more harmful to the environment and more dangerous to the workers. But their are two forms of underground mining in-room and pillar mining in-room is when they get this machine and put it against a wall and it digs into the wall and takes out the material. Pillar mining is when they extract materials from a certain spots and leave some areas untouched so it can hold up the walls and roof of the mine.

Pillar Mining

                                                   

In-room mining