Yes Golddig,
I've covered a lot of that area,
In that tunnel where the cave in is, that's just dirt
that has come down the shaft over the last 100
years.
The shaft itself has 3 tunnels running off it but they
are on average about 10 metres deep.
When you pass over the pile of dirt in the main tunnel it turns
left about 5 metres and continues straight about
another 10 to 15 metres.
The left tunnel runs for a couple of hundred metres
and comes to a T intersection, if you turn left again
it will bring you to another entrance which is closed
off, the right goes a fare way to a dead end.
The last few year's has seen some prospecting
carried out.
Also the giant mozzies are not mozzies so you
don't have worry about vampires
but they
are one of the many common bugs that you find
in the entrance of many audits.
Cheers steve