The geological structures at left bank slope of Jinping First Stage Hydropower Station are very complicated. Many deep cracks and faults

such as f2

f5 and lamprophyres X

are the most significant factors that influence the stability of the rock slope. Based on the strength reduction method (SRM)

realistic failure process analysis(RFPA) is used in the full failure processes evaluation of rock slope after excavation and its corresponding weak-layers replacement. From comparison results of numerical simulation

it can be observed that the safety factor increases by 0.430 after weak-layers replacement in deep rock mass

which illustrates the structural safety can be greatly improved if weak-layers replacement is conducted before excavation and support of rock slope. Furthermore

by using RFPA-SRM

not only the failure mechanisms and fracturing patterns

but also the safety factors can be obtained. The results can in turn be used for stability assessment and construction process determination of rock slope before construction.