Thank you for the links to the photos. That was exactly what I was looking for. I have found some more of Wath upon Dearne here:
www.francisfrith.com/search/england/south+yorkshire/wath-upon-dearne/photos/wath-upon-dearne_photos.htm

One of those is a picture of Sandygate and Annexe, which sounds as if it might be near to the Sandymount Road I was looking for?

There is information on Wikipedia concerning the pits, though often that is not very accurate. I had guessed that the last pits would have closed in the eighties.