I am new to Blender and would like to get done the following:

How to make an exploding wall so that it leaves hole? I have tried Cell Fracture- addon, but the results are sharp shards.

At the Youtube I have seen animations, where the breaking pieces are like rock, for example Phymec is awesome.

Second, how to prevent whole wall (simple cube) collapsing so that the wall stays on place, but gets a hole exploding?