Study on the influence of the depth/thickness ratio on the ground deformation

Ground deformation in goaf is affected by various factors. Basic on FLAC3D, making use of the flexibility of numerical simulation, we choose Coulomb-Moore Mode that is applicable to rock-earth materials, and study the influence on ground deformation from the mining depth and thickness to the depth/thickness ratio. The focus of the study is the qualitative analysis that the influence of the depth/thickness ratio on ground deformation from the simulation results. From the results we can make conclusions as follow : with the increasing of the mining depth, ground deformation decrease conversely. The larger of the mining thickness, the faster of ground deformation increasing. And in goaf with the same depth/thickness ratio while in different depth and thickness, the influence of the mining thickness on ground deformation is slightly larger than the mining depth.