Abstract: Taking roof fall accidents in 1212 transportation roadway of shuguang mine as engineer background,the reasons of roof fall accidents are analyzed.An important factor of the roof caving is geological structure.In the process of tunneling roadway,due to the presence of geological structure belt,especially the fault,the stratigraphic structure has big changes,it is easy to occur roof accidents.The article analyzes the simulation of optimization scheme by using FLAC^3D,the research shows that keeping the roof integrity is conducive to the stability of the roof and improve the strength of the roof,which can effectively control the convergence value of roof and floor and the two sides.