In order to analyze the deep stability characteristic of bank slopes in new Badong county after reservoir storage

firstly

the Baitu slope whicn is on the medial axis of sector of Badong new county is selected as a typical slope

based on the monitoring data of drilling which is more than 300 meters deep the zonation of deep rock structure is done according to the distribution of weakness zone

rock and integrality

lithologic characteristics. Then

based on the geological strength index GSI

the Hoek-Brown rule is used to estimate the rock strength parameter. Finally

the FLAC numerical simulation is applied to analyze the stability characteristic of the bank slope after reservoir storage. It is concluded that the stability appears to decrease with the rising of water level

but it is not obvious

Baitu slope is in integral stable status. When the strength reduces to limit state

the shear strain increment zones locate in the sixth to tenth weakness zone

when the earthquake effect is considered

the shear strain increment zones expand to the deep part of slope

the potential sliding surface develops consequently to layers.The precondition of failure is the plasticity transfixion of anti-dip part in the front of slope.