Study on failure mechanism and control technology oflarge cross section rockburst roadway

In order to solve the support problem of the mining roadway with large cross section rockburst in Gengcun Coal Mine ，the characteristics of roadway conditions and geologic parameters of surrounding rock are introduced.The deformation and failure characteristics of rockburst roadway are analyzed.The major factors affecting the deformation and failure of roadway are high stress，strong dynamic load，pressure relief and support system.Frequently impact of the energy will impact damage effects，pressure relief measures will great influence on the surrounding rock structure and support system，the failure of the active support system will cause severe deformation of the roadway.The section of rock burst roadway pressure characteristics significantly different from ordinary roadway.The displacement and the separation of the roof are different in different areas and locations；deformed by excavation roadways faster and more intense，longer stable；the stress of the anchor cable in the pressure bump is serrated or stepped fluctuations.The underground industrial test in Gengcun Coal Mine 13230 lane，The driving section is over 30 m2，which belongs to super large section rockburst roadway.Mine pressure monitoring data show that using the proposed support scheme can effectively control the deformation of surrounding rock，roadway condition can be improved.