I'm no expert, but those heavy chelae suggest male to me.This is an adult Mastigoproctus giganteus (Giant Vinegaroon) and it's digging a tunnel. Maybe a male?
and here are some photos so that we have photographic evidence of what is said above.don't know if anyone has ever noticed or mentioned it here but I found all species I keep to easily take prekilled prey (and not only freshly killed), so I guess its safe to call them scavengers too.
I'm going to try feeding them small pieces of meat the next days to see if they will accept it too (somehow I have a feeling that they will)