Abstract：Kinematics combined with probabilistic and statistic analysis is adopted to calculate kinematic energy and bounce height，which are the control factors for designing rockfall protective structures. Both rotational kinematic energy and translational kinematic energy are calculated by kinematics. The non-determinacy of falling rocks is an important specialty of rockfall. This is analogized by probabilistic analysis by altering calculating parameters in a certain range. Then，the results changes accordingly in a range，and are studied by statistic analysis. Because the slopes around the switch station for Baoquan pumped-storage power station are steep and high，this switch station is recommended to be relocated to avoid the most dangerous location where may encounter with rockfalls. But rockfalls may happen in the new area，too. So，protective structures should be built for the switch station. Based on the high rock slopes at back of the switch station，according to historical rockfall，experimental research and empirical parameter values from other projects，two-dimensional calculating cross-sections，parameters and size of rocks that may fall are determined. Computing models are established according to the practice by above-mentioned method of kinematics combined with statistics and probabilities. Based on these models，protective structures are discussed. To deal with the rockfalls that may happen in this area and to protect the switch station，a protective one of retaining walls and another plan with both active protective methods and soft protective nets are both in consideration. According to the calculated results，the two plans are compared and the plans should be chosen both by economic and technical considerations.
