I'm aware that dropping mineholes over object occupied space results in the minehole not being able to be entered. And I'm also aware that around every cave entrance there's a ~30 tile buffer zone that cannot be mined out.
What happens if I try to drop a minehole into this buffer zone area? Would the unmineable tile also count as unoccupiable space and thus not let me enter? Would it create a ladder square area within the unmineable space but then be essentially useless because you could not mine any of the adjacent walls? Could you place mineholes close enough to eachother on the surface so to create a walkable space from the cave entrance through the unmineable tiles?