#### 2019 CSCE Annual Conference - Laval (Greater Montreal) Conference

This paper examines the effects of falling objects impacting on protective structures in the mining industry. The impact problem is defined in terms of the equality betwen impact energy and work energy dissipation of the structure. To obtain realistic results from the mathematical structural model, the assumption is made that the impact energy is distributed to all members that experience deformation from the impact. The distribution of the impact energy to the structural members is taken as proportional to the force that causes the deflection in the member during impact. A simple mathematical procedure to estimate both elastic and rigid-plastic response of the structural members is presented. The problems encountered in defining the impact energy and a design criteria are discussed. Numerical examples are worked out to illustrate the mathematical procedures.