Study on the Mixing Proportion of Coal Gangue Cemented Filling Materials and Subsidence Control Effect in a Mine

When mining of the thick coal seam, a large range of goaf will appears because of large mining height, so that the serious surface subsidence will come. For the protection of the surface buildings' safety, the filling mining can effectively control the surface subsidence. Based on coal gangue of a mine in Datong city, the coal gangue cemented filling materials that satisfies with the filling requirements and have better economy and reasonably ratio was made in the paper, the filling effect of different mixing proportion materials was simulated, and it has the important application value to filling mining and control subsidence in the coal mine.