Abstract: In order to ensure the safe and high efficient production of the shallow short-distance multi-seams coal in fully mechanized coal face，the rational support strength of a room pillar beneath goaf is investigated by the theoretical analysis and the numerical simulation.The results show that the depth of stress concentration at the remained pillars is about 20 m，so the effect of concentrated stress at the under-part working face.In the support control area，the vertical stress concentration factor of the remained coal pillars on the under-part is 1.30.Based on “short voussoir beam” theory，the rational support intensity of the coal room pillars in Dadijing coal mine for the fully mechanized coal face under goaf is calculated as the value from 1.07 to 1.21 MPa.The research can offer some meaningful reference and guide for determining the reasonable working resistance of the support in the similar condition of fully mechanized working face.

Key words: Short-distance multi-seams, Shallow coal seam, Room-pillar goaf, Supporting intensity