The Laws of Surrounding Rock Stress Distribution at Fully Mechanized Coal Face in Close Distance Coal Seams Under Rib Pillar Gobs

When using full-mechanized mining technique to recover at fully mechanized coal face in close mine seams under the rib pillar gobs,the tool pillar will be subject to the double impact from the vertical stress of top rock and advance support stress of underneath working face.While coal pillar pass the stress to the lower coal-rock mass,the lower fully mechanized face is formed stress concentration zone,which will affect the stability of roof and distributed of support stress in lower working face.In this paper,the stress distribution of the roof is researched according to the actual mining of 12^# coal seam under rib pillar gobs in Tangshangou coal mine,which will provide a theoretical basis for support design of roadway and stent selection.