Study on Coupling Relation Between Broken Key Stratum and Thick Unconsolidated Layers

Based on the similar material simulation of strata subsidence, studied is the key stratum's control on strata movement and surface subsidence, as well as the key stratum's broken effect on displacement cure of surface subsidence, some basic laws of coupling relation between soil and key stratum Key stratum plays a controlling role to rock stratum and surface movement. When key stratum is under control of elastic or plastic in the form of elastic ground panel or beam, surface subsidence belongs to bended subsidence. When key stratum is of demolition and movement, surface subsidence belongs to fractured subsidence.