Abstract:

Huating coal mine mining the fifth coal layer, the largest mining depth is about 800m. The fifth coal layer is thick coal seam, average thickness 37.5m，coal seam dip angle 0～9°,strong rockburst proneness. In order to prevent rockburst and raise mine safety coefficient, By theoretical calculation, numerical simulation, field observation method, we analysis the impact of stress variation and abutment pressure in the narrow coal pillar and working face. By analyse the deformation rule of the narrow coal pillar and the excursion of four different width coal pillar plastic zone , we finally get the property width of section coal pillar of Yanbei mine.

Key words: super high seam, high rock pressure, narrow coal pillar, parameter