How did the accident of the mine happened?

Answer 1

To start off, mining is one of the most dangerous jobs because you are going underground and there are many small expositions that you have to becareful not to trigger. Somehow, one of the mini "bombs" you can call it, exploded and the miners got trapped underground. It took 2 months to keep the ground from completely falling on them, then took about a week to use the transport thing to get all of them out.

Hope this helped!