Abstract
The purpose of this study is to clarify the relationships between incoming angle and coefficients of restitution, friction coefficient, rotational motions, and energy ratio for spherical boulder impacting on rock plate. In this paper, the parameters for spherical boulder impacting on rock plate will be presented based on our experimental data by free-fall-rebounding laboratory experiment using high-speed video camera system. Furthermore, this paper explains influence of combination of normal and tangential components of coefficients of restitution for numerical analysis on rockfall motion. As the experiment results, the incoming angle is one of the factors that greatly affect the value of tangential component of coefficients of restitution. The normal and tangential components of coefficients of restitution are closely related to energies after impact. The result of numerical analysis showed that the increasing trend of the tangential component of coefficients of restitution can be modeled with spring-dashpot-slider system.
