The first part of a project aiming at increase the knowledge and understanding of how shotcrete (sprayed concrete) in interaction with rock could better be modelled is presented. The study focus on how an irregular thickness of shotcrete will affect its structural capacity. Examples show that continuously bonded shotcrete have an ability to redistribute local stresses while partly de-bonding leads to localized, wide cracks. One goal is to obtain a better understanding for how and why cracking and bond failure is initiated. The results obtained so far are here briefly summarized and commented, also showing some examples of results.