For the sutra cases of Shijing Mountain based on the investigation in site

the lithology

terrain and the geologic structure are analyzed. The potential slopes with rockfall are confirmed initially. Four typical profiles are selected on the slopes and surveyed by BJSD-2B laser profiler. With the results of the numerical simulation

the locations A~F on the profiles are confirmed as the potential rockfall sources with the bigger possibility to fall. The volumes of blocks situated at A~F are gained in site. On the basis above

the kinetic characters(run-out distances

bounce height

kinetic energy and the translational velocities )of the six blocks are predicted and analyzed by the help of the rocfall software. The simulation results show that the rockfall of the block D threatened the life safety of the tourists less than other blocks

but it could destroy the sutra cave No.7 greatly. Oppositely

the rockfall of the other five blocks would threaten the life safety of the tourists greatly

but they wouldn’t destroy the relevant caves. The suggestion that the key locations and blocks should be reinforced as quickly as possible is given.