Abstract: The mining depth is around 1 000 m in Qishan Mine. With the increase of mining depth, roadway has failure phenomenon including top, side, and floor heave, as well as other large deformation, with a maximum roof and side failure more than 1 100 mm, under the influence of high ground stress, especially horizontal tectonic stress and fault cutting conditions. The existing support can barely control the stability of surrounding rock of roadway, which has seriously affected and restricted the safety production. This paper has presented detailed analysis of the characteristics and controlling factors of roadway failures, based on the supporting project in Qishan soft rock roadway, and has put forward the failure mechanics mechanism of high stress soft rock roadway expansion, and developed the coupled bolt + mesh + anchor supporting measures to realize coupled supports with strength, stiffness and the structure, so as to achieve the stability control in deep soft rock roadway excavation. The effects of this coupling support have already been validated by the results of field monitoring.

Key words: high stress, composite soft rock, fault fracture zones, throughout layers roadway, coupling support