Abstract: On the basis of investigation on footwall waste dump's slope failure and waste disposal technology,this paper analyses three modes of slope failures of the waste dump;analyses the main factors effecting on waste dump's slope failure such as topography, surface soil, mechnical property of loose body, hight of bench,edvancing velocity etc,and makes their sensitivity calculating. Based on the comprehensive aalysis,the rational hights of waste dump's benches are presented;and the effective lengthes of all waste disposal fronts,in un-effecting on production capacity of waste dump,are determined.