Aiming at the accumulation slope problem which is frequently encountered in the domestic southwest region hydropower project construction

the genetic mechanism and evolution process of accumulation slope was analyzed in detail on base of the piled rock mass characteristics

environmental conditions and engineering geology

and its formation. Generalized geological model has also been restored. Meanwhile

the research is also combined with the geological phenomena and drill core data gained from field displacement exploration. The results show that: the whole accumulation slope is a collapse accumulation

but in the process of formation

large-amount of local destruction occurred in district 1

resulting in geomorphology and internal structural differences between district 1 and district 2. At the same time

the macro-qualitative evaluation and detailed calculations of the stability analysis show that: the whole accumulation body tends to be stable

but the shallow overburden is quite

and in centre there are some local poor stability regions; in order to ensure the normal operation in later stage

and consider the engineering

environmental

and economic factors

foot presser was taken in district 1; cutting slope and retaining wall were taken in district 2. The calculation results can provide the necessary guidance and reasonable basis for the engineering design

and can also provide reference for the analysis of similar projects.