[Retracted] UAV Tilt Photography Control for Numerical Simulation of High and Steep Rock Slopes

Table 1

The selection range of the proposed restoration coefficient of Ye Si Bridge.

Slope characteristics	Coefficient of normal restitution	Tangential coefficient of restitution
Smooth hard rock surface, paving surface, shotcrete surface, and masonry surface	0.25∼0.75	0.85∼0.98
Soft rock surface and strong weathering hard rock surface	0.15∼0.37	0.75∼0.95
The slope is stacked with stones	0.15∼0.37	0.75∼0.95
Dense gravel accumulation, hard soil slope, vegetation development, mainly shrubs	0.12∼0.33	0.30∼0.95
Dense gravel accumulation slope, hard soil slope, no vegetation, or a few weeds	0.12∼0.32	0.65∼0.95
On the loose gravel slope and soft upper slope, the vegetation development is mainly shrub	0.10∼0.25	0.30∼0.80