Determination of Narrow Coal Pillar Width and Roadway Surrounding Rock Support Technology in Gob Driving Roadway

In order to determine the rational width of coal pillars and study surrounding rock control technology gob side entry driving with a narrow pillar, this paper first calculates pillar according limit equilibrium theory; after that, lateral support pressure plastic zone development goaf is analyzed by numerical simulation reserved pillar; finally, through ring breaking deformation regulation entry, failure characteristics gob-side roadway during excavation influence mining on are analyzed. The research results show combined theoretical analysis simulation, decided be 10 m; much bigger than roof subsidence, solid wall floor deformation; bolt design roadway, damage period small; mining, key factor stability roadway; under scheme, overall small, effect good.