Abstract: At present，domestic coal mines mainly adopt the combined support of bolting and shot⁃ crete and steel arch support. The traditional bolting and shotcrete support is a passive support method. The initial support structure of the support can not play a supporting role quickly，resulting in a large unloading deformation of the broken surrounding rock. In order to increase the support force at the initial stage of sup⁃ port，improve the integrity of broken coal and rock mass，and reduce the unloading deformation of surround⁃ ing rock，a physical and mechanical test was designed in combination with the size，geological conditions and support methods of the roadway in Changcun Coal Mine. The stability of roadway under different work⁃ ing conditions is studied by means of material preparation，excavation and support. The stress and deforma⁃ tion of surrounding rock are monitored by XTDP photogrammetry system and stress sensor，and the support⁃ ing effect of non-supporting，conventional steel arch support and adaptive steel arch support is quantitative⁃ ly analyzed by surrounding rock deformation. Through the practical application in the field，it is proved that the adaptive steel arch support structure can effectively restrain the initial deformation of broken surround⁃ ing rock and reduce the final damage degree of surrounding rock，which provides new ideas and methods for the problem of large deformation support in underground coal mine.

Key words: broken surrounding rock, adaptive steel arch support , surrounding rock deformation, sim? ilar simulation test