Shallow coal seam group mining key layer activation and recombination bearing structure and load calculation method

The invention discloses a shallow coal seam group mining key layer activation recombination bearing structure and a load calculation method, and the method comprises the following steps: S1, determining a rock beam structure of a key layer bearing structure based on a physical similar simulation experiment; s2, key layer bearing structure migration and surface subsidence characteristics are determined; s3, constructing a rolling friction mechanical model of the key layer activated bearing structure; s4, determining a rolling friction coefficient and a sliding instability discriminant of the key block; and S5, constructing a mechanical calculation model of the overlying strata activation and recombination structure in coal seam group mining, and determining a lower coal seam mining support load calculation formula. According to the method, a rolling frictional resistance model is established, the instability critical condition of the bearing structure is judged, a mechanical calculation model of the overlying