Explain any three features of underground mining method used in different countries of the world.

Explanation

Main features of underground mining are :
(a) In this method, vertical shafts have to be sunk, from where underground galleries radiate to reach the minerals.
(b) Minerals are extracted and transported to the surface through the passages.
(c) It requires specially designed lifts, drills, haulage vehicles, ventilation system for safety and efficient movement of people and material.