Coal Minning Questions

1)WHAT IS THE DIFFERENCE BETWEEN SURFACE MINING AND UNDERGROUNG MINING?

 

          When thecoal seam is fewer than 125 feet under the surface, it is mined by surface mining. Coal that is deeper than 125 feet is removed from the ground by underground mining 

2) WHAT KIND OF MACHINES ARE USED IN SURFACE MINING? NAME THEM.

 

Trucks

3) WHAT ARE THE TUNNELS IN UNDERGROUNG MINING USED FOR?

 

To found gold,silver,bronze,cristal,lazio,amatista,etc...

4) HOW DO THE CONVEYOR BELTS HELP IN THE PROCESS?

 

To travel heavy things to other parts and to help with the problems with sand and soil.

 

5) WHAT ARE THE THREE DIFFERENT TYPES OF MINES BUILT IN UNDERGROUND MINING? HOW ARE THEY USED?

 

a) When the coal seam is close to the surface but too deep to use surface mining, a slope mine.

b) A drift mine is built when the coal seam lies in the side of a hill or mountain.

c)