I’ll have to assume that you are having a problem with the exposed roots at the surface.  Maple trees are prone to doing this so it is a common problem.  You can cover the roots with soil or mulch but you don’t want to cover them too deeply or you “suffocate” the roots.  Don’t cover them with more than a couple of inches of soil or mulch.  HERE’S A LINK so you can learn all about this problem and the solutions available.