I am glad it turned out to be limestone!
I think you probably mean NT015757 for the grid ref. But looking at the map, that is not quite where I thought it was, so there may be even more. But there are more limestone mines to the west and south, at least, so I would not be surprised if there are even more. From rather vague memory there is one under the road at about NT005748.
Something was quarried, in large quantities, to the east (NT036758) too, but I think that is now landfill. It may have been oil shale, as that was also mined just to the east, at Philipstoun.
This area seems to be worth further investigation. There is something in a geology book which I have somewhere, but I can't find it right now. I will post something here when I do find it.
Alan