6. Conclusion
The extent of threshold distance of damage zone of the YLTP Fault is
estimated as 5.9±0.6 km, which reaches values close to the maximum
reported in literatures. Within the threshold distance of YLTP Fault,
both fracture spacing and density (joint volumetric count) and rock mass
cohesion exhibit a power law relation with distance from the core of the
YLZP Fault. Based on this relationship, we conclude that rock mass
structure generated by internal dynamic action of faults is the dominant
control on rock mass strength within the damage zone. To predict/assess
the influence of faults in controlling regional landslide and rockfall
distribution, the spatial variation of the geometrical characteristics
of jointing is a key issue for future investigations.
Acknowledgments This work was supported by the Second Tibetan
Plateau Scientific Expedition and Research Program (STEP) (Grant No.
2019QZKK0904),
the Strategic Priority Research Program of the Chinese Academy of
Sciences (Grant No. XDA23090402), Application of Synthetic Aperture
Radar-Based Geological Hazard Analysis Technology on the Strategic
Electricity Transmission Passage of Sichuan-Tibet Plateau (Grant No.
52199918000C),
Foundation of China Scholarship Council, and the CARIPLO 2016-0756
@RockHoRiZon - Advanced Tools for Rockfall Hazard and Risk Zonation at
the Regional Scale project.