Respuesta :

Answer:

Each underground mine is unique, but they all have at least a few things in common. They all have access shafts for workers and equipment, recovery shafts to bring excavated rocks to the surface, and ventilation shafts. They also all rely on a communication system between the depths of the mine and the surface. 5.

Explanation:

Underngound mining is a hard and risky work, and not many people mine underground