关键层破断与厚松散层地表沉陷耦合关系研究

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

采用模型实验方法,研究了关键层对覆岩及地表移动的控制作用和关键层破断对地表位移曲线形态的影响,对关键层与表土层间耦合关系进行了研究,揭示了关键层与表土层间耦合关系的一些基本规律。关键层对上覆岩层及地表移动起控制作用,当关键层以弹性地基板或梁的结构形式处于弹塑性变形状态时,地表下沉为弯曲型;当关键层破断及运动时,将导致地表快速断裂型下沉。

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.