ABSTRACT
Flyrock is the uncontrolled propelling of rock fragments produced in blastings and constitutes one of the main sources of material damage and harm to people. Intensely fissured and jointed rocks facilitate the appearance of flyrocks more than massive and homogeneous rocks. As the latter require large quantities of energy to obtain a good fragmentation, this type of rock usually causes more problems. The empirical models proposed by the Swedish Lunsborg and Persson and the American Roth are tools that predict the maximum throw of flyrock. Coverings are all the elements used to cover the blastings in order to avoid rock throw or any other material that could harm people, and buildings. Secondary blastings are a common source of flyrock. In demolition work, the blastholes drilled in the exterior structural elements should be protected by heavy screens made up of hanging conveyor belts.
