I read your text better now and it seems you have to have your statue broken in two. Is this right? Sort of like what I did to the moon here?
http://www.renderosity.com/mod/gallery/index.php?image_id=1809042

If this is the case, you can do like this:
1- duplicate your object and duplicate your terrain, so that you have two exactly equal sets, exactly overlapping in space.
2- In one of the pairs statue+terrain, do a subtraction.
3- In the other pair statue+terrain, do an intersection.
4- Separate the two pairs from one another and you have a convincing broken object.