Abstract ID: 3.8554 | Accepted as Talk | Talk/Oral | TBA | TBA

Rockfalls are one of the main natural hazards that cause significant damage and loss of life globally, especially in mountainous regions. These hazards are particularly dangerous due to their unpredictability and varying magnitudes. Rapid urbanization and inadequate infrastructure in developing countries increase vulnerability to these risks. This study aimed to investigate the stability of rock slopes in the northern part of Gebel El-Mokattam in East Cairo, Egypt. This work includes intensive field and laboratory tests to collect geological, structural, geomorphological, and geotechnical data from this region. This area has been affected frequently by rockfalls and landslides that impacted both the inhabitants and infrastructure. Field investigations revealed that the rock slopes are primarily composed of highly fractured limestone with medium to weak strength interbedded with highly swelling clays. During this research, rockfall modeling was conducted through trajectographic analysis on representative slope profiles to simulate the path of falling blocks. This analysis provided valuable data on the kinetic energy, bounce height, and runout distance of falling blocks, helping to evaluate the risk to nearby buildings and infrastructure. Furthermore, a rockfall rating system has been applied to evaluate the magnitude of the risk. The results show a high risk of rockfalls. Therefore, several preliminary and major mitigation strategies were recommended and tested to reduce rockfall hazards, which are directly linked to the results of rockfall modeling. This study highlights the importance of rockfall modeling in understanding hazards in mountainous areas. Also, the findings of this research will assist land-use planners and decision-makers in selecting appropriate mitigation strategies in areas of complex geomorphological and geological factors.