Abstract: For the two adjacent orebodies underground mining of metal deposits，it is important to understand the mining disturbance relationship and the mining step distance between them to achieve optimal mining of mineral resources and safety management of ground pressure.Previous studies have focused on the influence of mining sequence on the stress distribution state of surrounding rock，and have not theoretically analyzed the disturbance relationship between two adjacent ore- bodies in detail.Based on the concept of synergistic mining，the disturbance relations of two adjacent orebodies under different dip angles and different ore intervals are analyzed，the corresponding synergistic step calculation formula is given，and the engineering case analysis is carried out in combination with the two steeply inclined adjacent orebodies of Shandong Huibaoling Iron Mine and the two gently inclined adjacent orebodies of Yunnan Dounan Manganese Mine.The study results show that:①there is only one type of lower orebody mining to disturb the upper orebody in the horizontal-slowly inclined two adjacent orebodies，and the inclined-slanting two adjacent orebodies can be divided into three types:undisturbed relationship，single orebody disturbance relationship and mutual disturbance relationship between two orebodies；②the corresponding calculation formula of the synergistic distance of two adjacent orebodies is synthetically determined by the mining method and the relevant parameters of the orebody；③the two steeply inclined adjacent orebodies of Huibaoling Iron Mine should be synchronously recovered，and the V8 ore of the two gently inclined adjacent orebodies in Yunnan Dounan Manganese Mine should be advanced by two ore blocks in the V7a ore layer.The above study results can provide reference for the safe，efficient，green and cooperative mining of two adjacent orebodies in underground mines.

Key words: Underground mining, Synergistic mining, Disturbance relationship, Synergistic step, Mining sequence steps