Abstract:

Abstract：According to the problem of large deformation and support difficulty of 9+10#soft coal seam road under dynamic pressure roadway of Wu Yi coal mine，the methods of borehole imaging and numerical simulation were applied to analysis the mechanism of deformation failure of soft coal seam under dynamic pressure. Receiving the conclusion that the deformation and destruction of roadway’s two sides will lead to the increase of roof abscission layer, and the further increase of roof abscission layer will aggravate the extrusion of sides，thus causing the instability of surrounding rock. Based on the research of surrounding rock destruction mechanism of soft coal seam roadway under dynamic pressure，the support way and parameters of roadway are reasonably designed. The industrial test showed that the roadway sides and roof-to-floor convergence are 500mm and 900mm respectively influenced by mining. The roadway bolting technology meets the requirements of mining face.

Key words: Key words：soft coal seam, numerical simulation, borehole imaging, dynamic pressure, deformation failure, supporting design