Abstract: According to the features of the return roadway with a large section(6.5m×5.25m)and compound roof in Wang Jia-ling coal mine, combined the method of theoretical analysis and numerical simulation, determined the support parameters of bolt and anchor with the inter-array spacing 900mm×900mm and 1600mm×1800mm; the monitoring result shows that: in the distance 0~50m from the heading face to the measurement points, and the largest convergence between the roof and floor is 117mm, the largest convergence of laneway's side is 105mm; in the range of 50 ~100m, the convergence of roof and floor no more than 5mm, the convergence of laneway's side is no more than 4mm; over 100m, the deformation of roadway almost no increase; have a good control to the roadway deformation, could be the references to the mine which has the similar conditions.

Key words: large section, compound roof, bolt-steel mesh-anchor, combined support