关键词: 固体密实充填采煤, 岩层移动控制, 地表沉陷预计

Abstract: In order to achieve predicting the surface subsidence caused by solid compacted backfilling mining scientifically, it is necessary to establish the completed prediction model and its parameter system according to the evolvement rule of the structure form and movement characteristics of overburden rock. By means of similar material simulation and borehole peep, it is shown that overburden rock of mining with solid compacted backfilling is given priority to sagging zone, which appears complete layer structure, only develops some height of the fault zone near the roof strata, but not caving. The strata movement characteristic is similar to bending deformation of the laminated plates under the longitudinal loading, after a simplified mechanics. Based on the theory of laminated plates, surface subsidence prediction model of mining with solid compacted backfilling is established. It is shown that surface subsidence form of mining with solid compacted backfilling is still suitably described with probability integral model; and further discuss on parameters system of the surface subsidence prediction mode based on “equivalent mining thick” theory is carried out. Finally, the surface subsidence prediction model is applied to a real project, which obtains a good effect.

Key words: coal mining with solid compacted backfilling, strata movement control, surface subsidence prediction