Field test is a better way to find sensitive factors

explore movement law and get movement parameters in rockfall study. To analyze the influence of rockfall shape

size and movement patterns on its movement law

112 rockfall field tests are implemented. Statistics of horizontal movement distance and velocity under the influence of rockfall shape

size

and rebounce time are conducted. The results show that no matter what shape rockfall is

its movement mode are limited to rolling and bouncing

and there is no apparent sliding section. And about 59% test rockfalls are intercepted by the platform of slope and roadside trench which can be selected as passive mitigation measures. The spherical

square and short cylinder rockfalls have longer horizontal movement distance

bigger faster velocity

and the same movement features. But the rectangular and sheet rockfalls have poor movement capacity

and their movement features are similar to that of the long cylinder rockfall. To sum up

the cylinder assumption for rockfall movement calculation is more realistic. The rockfalls with smaller quality have the worse movement capacity but the greater randomness. When the rockfalls roll mainly

the kinetic energy loss is serious

and both horizontal movement distance and velocity are greater when it bounces mainly. Furthermore

when rockfall collides with the slope surface

its movement parameters and direction will change dramatically.