Yes, there is offcourse in the 747 a reverse interlock which will be removed upon touchdown so that the reverse levers can be moved to the "unstow position" and after they have reached 90 percent of their travel to the extended position the second interlock will be removed so that you can increase rpm off the engines using the reverse levers.
Offcourse in my boing manual it states that after selection of reverse thrust it is not recommended to make a go around due to possibility of not fully retracting reverser shells.
It does not say anything about a go-around once the wheels are on the ground, it will basically be the same as a touch and go in that case