Question

Which of the following statements are correct related to underground mining method? Choose the correct option:
i. It is used when the ore lies deep below the surface.
ii. It is the easiest and cheapest mining method.
iii. It requires specially designed lift and drills.
iv. It is also known as shaft method.

• A. Only i, ii and iii are correct.
• B. Only ii, iii and iv are correct.
• C. Only i, iii and iv are correct.
• D. Only i, ii and iv are correct.

Hint:

When learning about mining methods, focus on the depth and location of the ore, as well as the type of equipment used. Shaft mining requires deep excavation and specialized tools, making it more expensive.

Answer 1

The Correct Option is C

For ore deposits situated deep beneath the surface, underground mining, also referred to as the shaft method, is employed (i, iv). This technique necessitates the use of specialized machinery, including lifts and drills (iii). The process involves excavating a vertical shaft to access the ore. Nevertheless, this method is neither the simplest nor the most economical option (ii), incurring higher expenses and greater complexity than surface mining.