If you park at the top, the public footpath runs straight through the garden of a house that is isolated up there. I have spoken to the lady owner twice and she is quite happy for people to trundle through.
I suspect the lack of response is because the mine is probably within the Gwydyr Forest and it is currently a "hot" topic. For the last "goodness knows how long" everyone has been freely wandering in without any issues.
There are no gates.
Ian
A door, once opened, may be stepped through in either direction.