very vey much is hard to stay for a long time, also what is very interested is the fact of the guys who are ht licences to used explosive, they used dinemat and they have a like let say 5 minutes to hide till they go off.
the shape of the miners body is very good man for real no joke no fat man very lean and atletic,
All I have to say is I'm here to give my personal opinion, and you don't have to follow my advice, please do your own DD before you invest. And don't blame others for your bad choices".