Question

Which of the following statements are correct related to underground mining method? Choose the correct option:

1. It is used when the ore lies deep below the surface.
2. It is the easiest and cheapest mining method.
3. It requires specially designed lift and drills.
4. It is also known as shaft method.

Options

• Only i, ii and iii are correct.

• Only ii, iii and iv are correct.

• Only i, iii and iv are correct.

• Only i, ii and iv are correct.

Answer 1

Only i, iii and iv are correct.

Explanation:

Statement (i) is valid as underground mining occurs when ore resources are deep below the surface. Statement (iii) is valid, as this process requires specialized equipment like lifts and drills to extract minerals efficiently. Statement (iv) is valid as it refers to the shaft method, which involves digging vertical shafts to access subsurface reserves. Statement (ii) is incorrect as it is not the easiest or cheapest mining method due to high prices, complicated machinery, and safety issues.