I'm trying to make a mining mechanic for a 2D space game. I guess the most obvious way would be 2D voxels tiles, but I was aiming for something simpler, that could blow chunks off of the asteroids by shooting at them, or something like that.

I'm looking for suggestions on how this could be achieved. Thanks

One simple way would be to have each asteroid have a size, and when you shoot an asteroid spawn a smaller asteroid (size 1 or 2) and decrease the size of the asteroid that was shot by the size of the spawned asteroid.