Abstract: In engineering background of Suan Cigou coal mine, this project firstly examines the strata behavior regularity in aspect of strong strata behaviors and large mining height fully mechanized caving face which has already heightened opening pressure of safety valve and has taken the measurement of goaf strip interbal coal wall, and then analyzes stent adaptability. Specifically, this project initially monitors the working face in perspective of working resistance of support and strata behavior. Through the theoretical calculation and actual measurement analysis, the roof structure model of working face and the measured strata behavior regularity could be subsequently obtained. At last, from the aspects of working resistance of support, roof control result, roof control and support working state, this project verifies stent has well adaptability, which could satisfy the requirement of roof control.