L'Effondrement [Mine Collapse]

You are a team of miners and are working 500 feet underground in a gold mine. As you finish your day, the earth begins to shake. What you feared most has just happened: the exit of the mine has just collapsed. You are now stuck inside the mine with your work team and you already feel that it is harder to breathe. You know that air will be more and more rare in the next hour. Your team needs to turn the generator back on to get air before suffocating and then find a way to escape.