摘要
讨论了地表非连续变形的发生条件及其对建筑物的损害，认为煤岩层赋存状况和构造形态是非连续变形的内在条件，采矿对弱面的扰动是外部条件；利用有限元方法深入分析了非连续变形的力学原因和发生机理，软弱面释放大部分采动竖向正应力和剪应力，使其不同程度地受到采动影响，导致弱面处的非连续变形；提出了地表非连续变形的计算方法和参数确定方法，结合实例进行了应用研究。
After discussing the conditions for surface discontinuous deformation and the damages induced by deformation, the author considers that occurrence, tectonics of strata are the inherent conditions for deformation. And disturbance to the weak surface due to coal extraction is the external condition. Finite element method is applied to investigate the mechanics and mechanism for such deformation. Most vertical positive stresses and shear stress due to coal mining are released by weak planes, which leads to discontinuous deformation of the weak planes. The method for calculation of deformation and method for defining the parameters are illustrated with examples.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
1995年第6期614-618,共5页
Journal of China Coal Society
关键词
非连续变形
计算法
地表变形
煤矿
weak plane, mining, discontinuous,calculation method
