Question

Compare quarrying with shaft mining. Which method is more hazardous? Why do you think so?

Answer 1

Answer:

Mining is the process of extracting buried material below the earth surface. Quarrying refers to extracting materials directly from the surface.

Explanation:

Retreat pillar mining is one of the biggest causes of mine roof-collapse deaths, according to studies done by the National Institutes of Occupational Safety and Health, which concluded that “a coal miner on a pillar recovery section was more than three times as likely to be fatally injured” in a roof collapse than ...