In order to solve the problem in supporting cross roadway with large span in Hemushan mining area of Maanshan Steel Group,the roadway destruction was investigated.A special inclusions structure which can cause local stress concentration and failure in rock was observed by video microscope.And the damage reasons of roadway were found out.On the basis of these,a composite support scheme of bolt-steel mesh-shotcreting for the first flexible support and bolting-grouting and pre-stressed anchor cable for the secondary fortified support was designed.Simulation analysis was made on the supporting mechanism of the combination of bolt,shotcreting,steel mesh and grouting by nonlinear finite element software ABAQUS,and the results of numerical calculation proved the combined support scheme to be rational.The monitored results of case engineering show that the deformation of surrounding rock at the cross roadway tended to be stable,the accumulative displacement of surrounding rock among two sides of the cross roadway was in the range of 20mm,resulting in good effect of support.