用弹性板理论分析采场覆岩中的关键层

ANALYSIS ON KEY LAYER OF OVERLYING STRATA WITH ELASTIC SLAB THEORY

以岩层控制中的关键层理论为指导,应用弹性板理论建立了关键层的刚度条件和强度条件。结果表明,用板理论分析的结果与梁理论推导的结果具有相同的表达形式。最后,用实例证明了覆岩关键层的存在及对地表下沉的影响。

Under the guidance of key layer theory in strata control, the conditions of stiffness and strength for key layer are established by using elastic slab theory. The study result shows that the same expression can be obtained both from slab theory analysis and rock beam analysis. Finally the existence of key layer of overlying strata is proved with practical example.