Abstract: With the development of open pit mining for many years,some waste dumps are out of service,so how to close them safely has become the task that the mine must complete.In order to accurately analyze the stability of a waste dump,this paper analyzes the influencing factors of the stability of the waste dump according to the site investigation and geotechnical exploration.The stability of the waste dump under different working conditions is calculated by geoslope.The calculation shows that the overall stability of the multistep waste dump is good,and the corresponding safety measures are put forward according to the defects of the waste dump,it provides a basis for the closure of waste dump.

Key words: present waste dump, stability, limit equilibrium, safety factor