Abstract: Analog simulation and numerical simulation were applied to researching main roadway damage based on geological condition of Shuanglong Colliery. Damage cause and repairing method of main roadway was analyzed. Experiment for U-steel semicircular arch yieldable support on the basis of comprehensive supporting of "anchored bolt and cable-mesh-grunting-W steel strip " was made. Experiment effect was good and provided scientific base for repairing main roadway.