Abstract：Based on the observation and numerical simulation of roadway failure in deep mining，it is found that the horizontal tectonic stress is much greater than the original vertical rock stress and the in-situ stress is beyond the strength of rock surrounding roadway in Kailuan mining area. Thus，the large deformation of roadway and catastrophic floor heave are deemed to be inevitable. With the increasing of mining depth，coal bumps become more severe and violent. Translatory coal bumps are the main dynamic hazards in deep mining of Kailuan mining group，which have different mechanism compared to the rock bursts happened in hard rock under large-scale in-situ stress. Furthermore，it is noticed that the fracture zone of surrounding roadway is mainly influenced by the in-situ stress. However，the roadway shape has little effects on the fracture zone of surrounding roadway.
