It's self-explanatory. Let's say i have a Steelix on who i gave him Life Orb and his ability is Rock Head and i use Earthquake, will the recoil damage from the Life Orb dissapear? I am just curious.
No.
Rock Head prevents recoil damage from moves like Double-Edge, but not from use of a Life Orb, Jaboca Berry or Rowap Berry or the move Struggle. Recoil damage is still received if Jump Kick or Hi Jump Kick miss.
http://bulbapedia.bulbagarden.net/wiki/Rock_Head
