Determining Reasonable Pillar Width of Roadway Driven Heading for Adjacent Advancing Coal Face

Aiming at the problem of roadway layout of the roadway heading for adjacent advancing coal face in Dongyi Mine, combined the methods of numerical modeling calculation and theoretical analysis, we study the lateral support stress distribution, roof deflection distribution of different places around 4101 working face and plastic zone distribution in different width of coal pillar. It shows that the distribution shape of lateral support stress and deflection value is like “hump shape”, and there is the elastic stability zone in the coal pillar when the roadway is arranged at the inside of the peak of deflection, which ensures strong carrying capacity of the coal pillar. Combined actual production conditions in Dongyi Mine, and finally it is determined that the narrow pillar width is seven meters.