Abstract: In order to solve the difficulty of heavy deformation about tendency high level suction roadway of Wuyang coal mines with two-time kinetic pressure，the characteristics of fracture development of 3# coal seam，and the physical property of surrounding rock are analyzed，and the deformation mechanism and failure characteristic of surrounding rock at the dynamic pressurized roadway are investigated through using UDEC4.0 software.Then，the roof and bottom deformation rate，two working slope deformation rate and cross section of closing rate are counted，finally determining that floor heave is the most important reason for surrounding rock deformation.Based on the original supporting scheme，the support parameter is optimized，proposing one reinforcement scheme with two working slope reinforcement + bottom high pre-stress slit wedge tubing yielding anchors supplement reinforcement.Its supporting effect is numerically analyzed.The field experiment data showed：by using this optimized scheme，movement of roadway roof and two sides were reduced by 58.5% and 60.7%，the maximum floor heave quantity is 198 mm，which is 34.2% of the original roadway deformation.Therefore，the supporting method can control deformation of dynamic pressurized roadway with two-times kinetic pressure，and lay a foundation for controlling mine gas and ensuring safety and efficiency in mining.

Key words: Dynamic pressurized roadway, Deformation mechanism, Floor heave, Numerical simulation