| Citation: | ZHANG Le，CHEN Pei，XIANG Bo，et al. Rockfall damage evaluation and treatment suggestions for mountain highways based on three-dimensional kinematic simulations[J]. Bulletin of Geological Science and Technology，2025，44（2）：1-12 doi: 10.19509/j.cnki.dzkq.tb20240068
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Three-dimensional kinematic simulation, which takes into account the characteristics of slope topography, serves as a crucial foundation for assessing rockfall risks in mountainous highways. Additionally, its computational outcomes can significantly enhance management strategies for rockfall mitigation.
Leveraging field investigations and Unmanned Aerial Vehicle (UAV) aerial surveys, we conducted a detailed analysis of the distribution, material composition, and disaster characteristics of hazardous rocks within the study area. Using RocPro3D software, we simulated the three-dimensional kinematics of rockfall to evaluate the disaster's impact and assess the effectiveness of engineering interventions for rockfalls of various particle sizes, complemented by protective measures.
Our findings indicate that joints formed due to tectonic compression and stress relief from unloading segment the precarious rock masses, while weathering cavities at their bases diminish stability. Hydrostatic thrust exerted by trailing edge cracks, along with water seepage through these fractures, are identified as typical triggers of rockfall events. Post-collapse, the velocity and impact energy of falling rocks initially increase and then decline, while bounce height exhibits variability before showing a decreasing trend. Hazardous rock zones within the study area pose a significant threat to management facilities situated at the foot of the slope. An effective remedial measure involves clearing areas adjacent to dangerous rocks with diameters less than 0.8 meters and implementing a passive protection net measuring 5.0 meters in height, designed to withstand an energy level of
Three-dimensional kinematic simulation provides detailed information on rockfall movement traces, velocity, energy, bounce height, and unit density. This approach transcends the spatial limitations inherent in two-dimensional cross-sectional analyses, proving immensely valuable for evaluating disaster damage and enhancing geological disaster prevention efforts.
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