Abstract: In the southeast Fujian Province, the rockfall induced by the spherical weathering of granite rock mass is one of the most prominent geohazards. One of the methods to minimize the rockfall hazard is to study the rockfall movement and to determine the optimized slope shape. This paper presents the rockfall trajectory study results of three basic variables: slope angles; width of relief platforms and slope shapes. The main conclusions are: compared with rock slopes, soil slopes with vegetation cover have an obvious "energy dissipation" effect; increase the width of the relief platform and install vegetation on the relief platform will effectively impede the movement of rockfall. Flatten the slope will delay the initiation of the rock rolling and will control the distance of the rock movement. A wide relief platform with a flat upper slope, a steep lower slope is the optimized configuration for the rockfall hazard control.

Key words: Rockfall, Movement Trajectory, Wide Relief Platform, Slope Shapes, Slope Angles;Rocfall