Question

In which mining are safety precautions very important?
A. Open cast
B. Alluvial
C. Strip
D. Underground

Answer 1

Hint: The more risky the place is, the more precautions need to be taken. Some types of mining are more risky because of the nature of the mines or because of other associated risks like suffocation or accidents. Mines which are in closed spaces are more dangerous.

Complete Answer:
Mining is the process of extraction of valuable minerals, metals or other geological materials from the Earth. It is usually in the form of ore. These deposits are extracted and then processed by various methods depending on what is being extracted. Mining is a very dangerous activity with many risks and dangers. That is why there are a number of safety measures that are mandatory. We shall now see which kind of mining has the most risks.-

A. Open cast mining is the process in which minerals or ores are extracted from the earth by cutting a huge open air pit. It has health risks to the miners but is not the most dangerous kind of mining. Hence, it is not the correct answer.

B. Alluvial mining is the method of mining the deposits on the stream bed. This too is a very safe mining process. So, this is not the correct answer.

C. Strip mining is the process where a seam or layer of mineral is excavated by first removing a long strip of the soil and rock above it. This is not the kind of mining which needs most safety measures.

D. Underground mining is the process in which the ores and minerals are mined through shafts and tunnels which are dug underground. It is a very dangerous method and has a high risk to the health and safety of the miners. Thus, this is the correct answer.

Hence the correct answer is option D.

Note: Open cast mining is very damaging to the environment and the health of the workers. Strip mining is most often used to extract coal and brown coal (lignite). Alluvial mining is most commonly used to collect gold from riverbeds. Underground mining is used for extracting both metal ores and gems.