Yup. Completely abandoned. We came across it whilst driving between Chillagoe & Cairns (i.e. on the main road), and stopped off for a poke about. I don't recall there being any issues with investigating it. Didn't find any underground stuff though, as if we had, we'd have looked, having our caving gear with us.
Can't remember much of interest, but it does (did) look exactly like that.
Chris.