Hello, and hope this helps
Shatter may be the one you are looking for, you’ll have to create a big image in photoshop, your grid, also you are going to need the same grid in a black and white you can just duplicate the images layer then select it and fill it with black, keep the transparency. the layer could be in the same photoshop document, once you bring it in to ea add shatter to the images (the grid, it is just one layer) also add the black layer of the grid you will use it as the custom shatter map you are going to have to play with the setting for the animation. for the shape on the pulldown menu for custom shatter map select the layer that is black and white. one thing i have not been able to figure out is to animate the explosion backwards what i had to do is once the animation is the way you think u want it put that comp in a new comp and play it backwards. on the timeline at the bottom to the left of the zoom buttons click on the two trialgles the on the strech value type -100 (minus 100)or select the layer and do (command+option+R)
checkout this site also
https://www.ayatoweb.com/ae_tips_e/ae52_e.html
good luck and hope this helps
matzunaga