1、绪言地下大面积的采掘,会对地表造成一定的影响。特别是对地表建筑物,这样就会造成所谓矿害现象的社会问题。但是,近几年来随着岩层移动理论的发展,为了减轻地表下沉对地表建筑物的危害,研究出一种分次协调采煤法。作者通过10年来在筑丰煤矿积极进行 1, Introduction Large underground mining, will have a certain impact on the surface. Especially for surface buildings, which will cause social problems of so-called mine damage. However, with the development of rock movement theory in recent years, in order to reduce the damage of surface subsidence to the surface buildings, a sub-coordinated mining method has been developed. The author actively conducted the construction of Chifeng Coal Mine in the past 10 years