Abstract:

The condition of Loess Geological stratum is complex, especially in mountainous areas, so that a great different regulation between the coal mining induced surface deformation and plain, as well as in the large mining height, shallow buried coal seam is even more so. This article chooses a very representative mining area named SanDaoGou as an example, using the software FLAC3D to simulate and calculate the large mining height mining induced surface subsidence of overburden rule, then base on detailed comparisons between the result and present measured data concluding that : by choosing appropriate boundary conditions and rock physical parameters, and simplifying the models properly is able to precisely simulate the preliminary rule that surface subsidence damaged, thus to make great preparations for the situation that the moving distortion of mining area in possible future. The results of this study have great theory value and the practice significance of science for reducing workload on the loess area outside, research on large mining height and the surface moving distort regulation induced by shallow buried underground mining for coal.

Key words: Large mining height, Shallow overburden, Loess layer, Numerical simulation, FLAC3D