Study On The Law Of Old Goaf Surface Movement Under The Building Load

In recent years, the rapid development of cities caused increasingly tense of land resources in coal mining areas. Especially less and less land were available for construction in some old coal mining areas. So some roads, bridges, factories and other buildings needed to be built up or through goaf. It is particularly important that if the safety for buildings construction over old goaf can be guaranteed. Therefore, study on the law of goaf surface movement under the building loads could support powerful guarantee for the safety of the buildings over old goaf.Study on Xinhuai Industrial Square in Xin Zhuangzi coal mine, this paper established movement and deformation monitoring network of Industrial Square’s surface and building (structure). Six comprehensive observations and4daily observations have been conducted for monitoring network in the standards of5"traverse and third-level national measurement standards. Based on the obtained measured data and mined-out area distribution, it has been analyzed that the surface deformation law of Xinhuai industrial square under building loads and building settlement rule, as the sinking isograms of each period have been drawn. Settlement prediction of the monitoring points in land surface and buildings have been conducted by GM (1,1) pattern. Simultaneously, the laws of mining overburden movement, land surface motivation changes and the development of "three zones" have been analyzed by using similar material simulation methods. And the size of building loads, loading position as well as the effects on land surface movement and deformation have been studied before the evaluation about the foundation stability of Xinhuai industrial square depended on the relationship between the height of caving crack in goaf and impact depth of foundation.