Anyone using this mine?

Have my strip mine main stairway started, began to excavate one of the levels and there's a lit hallway. Thought I was far enough from people, just looking to see if anyone has laid claim to it before I carry on...

Coordinates are X:1299 and Z:760, Y is below 50, guessing 40ish? Lemme know if I can carry on or if that's an area you want left alone

if its just a mine, i dont see why not, but if there are chests or something else down there as well i would just leave