This paper describes two numerical models that were performed to study the dynamic interaction between a crusher, a mechanically stabilized earth wall and a stockpile for the primary crusher at important mining project in Peru. The models were implemented in the finite element program Plaxis 2D AE and were aimed to evaluate the interaction between crusher and earth fill, the effect of the of the position of stockpile on the behavior of the structure, and the safety factor for different positions of the stockpile with respect to the crusher station. This article presents the details and results of these models.