Primary Activities

Question

Diffrentiate between opencast mining and underground mining.

Answer

Opencast mining

Underground mining

(i)

It is also called surface mining.

(i)

The underground mines are deep below the surface.

(ii)

It is the easiest and cheapest way of mining.

(ii)

These are called shaft mines also.

(iii)

Overhead cost such as safety precautions and equipment is relatively low in this method.

(ii)

In this method vertical shafts have to be sunk from where underground gatherers radiate to reach the minerals.

(iv)

The output is both large and rapid.

(iv)

This method is very risky.

Sponsor Area