>>1181965Some of these mines I have known bout since I was a kid, others I have found just by hiking and tooling around in the hills. Also have been in contact with other mine explorers that are willing to tell where good mines are.
Determining if a mine is safe is just a lot of paying attention. Adits (Entrance to the mine) are usually in rough shape, they erode and are prone to collapse.
Timbered sections of mines are always areas to be cautious around. They are timbered because they are weak sections.
I could go on, but I think you get the point.