I definetely wouldn't think it to be an ad hoc mine plow for a couple of reasons:
1) The width of this "mine plow" is too small; they are more likely to hit a mine with their tracks than those wheels.
2.) Any anti-tank mine packs a wollup. If that thing were to set one off, the explosive or concussive blast would not be absorbed by the road wheels enough to prevent catastrophic damage. The crew may survive, but not necessarily due to anything the "plow" had done. Also, it would be a fair bet to say, that any AT mine hit would score a mobility kill - that is, one that prevents the vehicle from moving. Therefore, as a sitting duck, you have bigger issues than just running over that mine.
However, upon closer examination, I did notice that the tow cable is attached to both eye holes, so it is possible that there are more road wheels that are not being shown, but that would mean that there would need to be 10-14 road wheels on one vehicle (there are 12 road wheels on each side of one AAV). Is that not a lot of road wheels for one vehicle just to prevent a mine. The expense of a crews life aside, to me that just seems a waste of valuable parts, when others could be used in its place.
Jeff