Abstract: Different mining sequence leads to the more difference of disturbance effect between adjacent seams，which directly relates to the safety of ore body mining.The impact of disturbance effect height on safe mining sequence between adjacent seams in the same stage was analyzed.The safe mining sequence and relationship in advance were discussed when two layers of ore body were mined from top to bottom at the same time or the lower ore was mined after the upper ore or the upper ore was mined after the lower ore.The study showed that tilt-steeply inclined multilayer ore body with different occurrence conditions can be mined in parallel layer by layer from top to bottom.The ore body can be mined in parallel piecewise from top to bottom when the rock movement angle(γ₁) is between 60° and 75° and ore body dip(α₂) meetsα₂≤γ₁+5° and the spacing of mine stratums(a) meets a＞15 m or the rock movement angle(γ₁) is between 45° and 60° and ore body dip(α₂) meets α₂≤γ₁+25° and the spacing of mine stratums(a) meets a＞20 m.When the rock movement angle(γ₁) is between 45°and 60° and ore body dip(α₂) meets α₂≤γ₁+10° and the spacing of mine stratums(a) meets a＞5 m or the rock movement angle(γ₁) is between 45°and 60° and ore body dip(α₂) meets α₂≤γ₁+20° and the spacing of mine stratums(a) meets a＞10 m，the lower ore should be mined after the upper ore as layer or segment from top to bottom.The upper ore can be mined 11 layers or 1 sublevels ahead of the lower ore.When the rock movement angle(γ₁) is between 60° and 75° and ore body dip(α₂) meets α₂≤γ₁+5° and the spacing of mine stratums(a) meets a＞15 m or the rock movement angle(γ₁) is between 45°~60° and ore body dip(α₂) meets α₂≤γ₁+25° and the spacing of mine stratums(a) meets a＞20 m，the lower ore can be mined 6 layers or 1 sublevel ahead of the upper ore.This study can provide quantitative reference basis for mining sequence of multilayer deposits in a stage.

Key words: Multilayer deposits, Safety mining sequence, Stage height, Rock movement angle, Ore body dip, Spacing of mine stratums