摘要
本文提出把岩石表示为开尔文体和弹性元件串联的力学模型,认为地下开采后的采空区上方和煤层上方的顶板为粘弹性基础上的粘弹性悬臂梁.根据悬臂梁受弯曲的理论,推导出了采空区和煤层上方地表下沉计算公式.
The paper puts forward the idea that the rock is showed as the mechanics model of Maxwell style and elastic element series and consider the root on the top of coal layers and the winning district after under ground mining as visco-elastic contileuer feam on the basis of visco-elesticity. According to the theory cf the bend of contilever feam, the puper has deduceed the ground subsiding calculation folmular of the upper palts of the winning district diitrict and cool layers.
关键词
粘弹性
悬臂梁
岩层
移动
下沉
visco-elastic
contilever beam
creep
relax
deflection
