Abstract: The 13-8# ore cluster of the Laochang Branch of Yunnan Tin Co.，Ltd. is a gently inclined multi-layer orebody，which is a typical complex difficult-to-mine orebody.In order to achieve the safety，high productive capacity and economy of mining in this mine，the traditional ascending and descending mining schemes were analyzed，and the advantages and disadvantages of traditional schemes were pointed out.By introducing the concept of "synergetic mining"，a scheme for synergistic mining of gently inclined multi-layer orebody was proposed.The scheme combines the mining disturbance of the gently inclined multi-layer orebody，the treatment of the goaf，and the control of ground pressure management as a whole.According to the geotechnical conditions of the orebody， the 13-8# ore cluster was divided into upper panel，lower panel and 13-8-7# inclined orebody，and the mining sequence of the ore cluster and the upper and lower panel was optimized.The study results show that the synergetic mining design scheme fully considers the geotechnical conditions of each orebody.Through the division of panels and the optimization of the mining sequence，the synergetic mining of multi-layer orebodies is realized，besides that，the synergetic mining scheme designed in this paper is help for ensuring the safety，high productive capacity and economy of the mining operation of gently inclined multi-layer orebodies.This scheme provides new ideas for the mining of the 13-8# ore cluster of Laochang Branch Yunnan Tin Co.，Ltd.，and also provides a reference for the mining design of other similar orebodies.

Key words: Synergetic mining, Gently inclined and multi-layer orebody, Complex difficult-to-mine orebody, Mining sequence