Abstract: With mining depth increasing, deep roadways emerge serious floor heave and roof convergence by complex stress field. Softrock roadways deformation of Qingshui Coal Mine is the most severe in Shenbei Mining Area. By researching on lithology and stress field, the paper draws reasons and failure mechanism of the typical roadway which use the traditional supporting methods. The deep soft rock supporting technology which is constant resistance large deformation bolt coupling technology was put forward. The technology control roadway deformation by constant resistance and energy absorption. The support method works well on site which provides a new way of control deep soft rock roadway large deformation.

Key words: deep, soft rock roadway, failure mechanism, constant resistance large deformation bolt