Question

5 advantage and 5 disadvantage of minerals ​

Answer 1

Answer:

The advantages of open pit mining

There are a number of advantages of open pit mining when compared to Underground Mining:

Open pits can sometimes be brought into production quickly. Underground mining requires development (shaft sinking, adits, declines etc.) which might take years before production can start. However, design & construction of the processing plant also takes a long time during which U/G development might be completed in parallel;

In some cases, the first ground removed from the pit is ore;

Open pits are generally safer than U/G mining;

Operations are highly visible to management & easy to control;

Disadvantages of open pit mining

However, disadvantages when compared to Underground Mining also exist:

Very large amounts of waste rock are mined. This creates costs as well as environmental issues with waste rock disposal;

Major disruption of surface: pit footprint, waste dumps. High visual impact, especially strip mining. After closure, rehabilitation may be difficult, slow & costly;

Very large volumes of overburden may need to be moved before reaching the orebody (e.g. coal) thus delaying return on capital expenditure;

Open pits catch rain, making them vulnerable to flooding, which may severely disrupt production;

High levels of skills are required in mechanized pits.

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