Abstract: The fully mechanized caving face cut-hole is a special type of coal roadway.Because of its large span，thick top coal and low strength of rock features，the cut-hole's surrounding rock has low stability，and it is supported difficultly.Taken the background of Xishahe coal mine 1901 fully mechanized caving face，and based on production technology conditions, the damage law of cut-hole's surrounding rock was summarized.The effect of different cut-hole span on surrounding rock stability was simulated.The results show that along with the increasing of cut-hole span，the roof and sides plastic area and maximum displacement value increases.The stress is transfer from sides to corner of cut-hole.The corner damages serious，and it should be supported specially.The support scheme is proposed finally，and industrial test is conducted.The effect is good.

Key words: Fully mechanized caving face, Cut-hole, Stability of surrounding rock, Numerical simulation