No, not the inventory grid. I'm talking about an 8x8 equipment grid that allows me to place fusion reactors, batteries, shields and personal laser defense turrets. But now that you mention it, it is quite possible that the grid was added by another mod (Bob's mod probably). The laser turrets and shield actually work while in flight. But since the grid was not added by you, I understand that you cannot do much about its content disappearing on being mined. Nevertheless, this is one of my favourite mods.