Arrange the following activities in a sequential order according to their occurrence.
(a) Vertical shafts
(b) Underground galleries
(c) Underground mining
(d) Transport to the surface
Choose the most appropriate answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (a), (b), (c), (d)
(a) Vertical shafts — first. In the underground (shaft) method, vertical shafts are sunk from the surface.
(b) Underground galleries — second. Galleries radiate from the shafts to reach the minerals.
(c) Underground mining — third. The minerals are extracted (mined) underground.
(d) Transport to the surface — fourth. The minerals are carried to the surface through these passages.
NCERT (2026-27): “When the ore lies deep below the surface, underground mining method (shaft method) has to be used. In this method, vertical shafts have to be sunk, from where underground galleries radiate to reach the minerals. Minerals are extracted and transported to the surface through these passages.” |