Abstract: Aiming at Laoling dump slope of Gongchangling open pit iron mine,on the basis of engineering geological investigation and physical and mechanical properties analysis,landslide model of dump was analyzed,analyzed model and parameters of dump stability were built,stability calculation was done on dump slope on condition of rainfall infiltration and normal,evaluation conclusion and suggestion were given,which had important directive significance for site dump production practice.

Key words: Dump slope, Normal condition, Rainfall infiltration condition, Engineering geological investigation, Stability evaluation