Abstract: Based on the site investigation of the tectonic stress area in eastern zone of Nanshan coal mine, the common failure characteristics of the roadway has been summarized in this paper. -120 total return wind roadway has been selected to study the deformation and failure mechanisms, reproducing the deformation and failure process of the soft rock roadway in tectonic stress areas under no support or ordinary bolt net support, by using FLAC3D and studies. The results show that the reasons of roadway damage include high stress, low rock strength and the inadaptaion of the original support to deep soft rock deformation. Finally, combining with the deformation and failure mechanisms, the relationship between surrounding rock and supporting body has been analysed, and their deformation and failure processes has been generalized.

Key words: tectonic stress areas, deformation and failure mechanism, interaction between surrounding rock and supporting body