Research On The Impact Of Mining Surface Movement On Village Houses Destruction Based On FLAC^3D

China is rich in coal resources.The coal reserves of shanxi in north China are up to a quarter of the national reserves,and most of them are stored in mountainous areas.The negative impact of mining and settlement after large-scale mining on the environment and society is more and more prominent,according to“The“three-down”coal mining regulations can protect the buildings in the mining area from the protection of coal pillars,but the complex topography of the mountains makes the impact on the surface and the deformation range after the large-scale mining of the mines difficult to grasp.When engineering geology and other factors work together,it is not suitable for the protection of surrounding buildings in all mining areas by using the traditional theoretical methods in the“three down”coal mining regulations.Therefore,in order to reduce and avoid the damage caused by mining subsidence after large-scale mining in the mine,it is necessary to strengthen the research on the settlement law of mountain mining and the damage to surrounding houses.In this paper,the Chengzhuang Coal Mine and the villages in its mining area are taken as research objects.The Chengzhuang Coal Mine has reserved protective coal pillars for the villages in the mining area according to the“three downs”coal mining regulations,but when mining to the villages,the villages The house still suffered extensive damage.In order to find out the cause of the damage of the building group,this paper investigates the engineering geological conditions of the village through geotechnical engineering investigation,conducts on-the-spot investigation on the damage of the building,summarizes the damage characteristics of the building group,and analyzes the damage law and mechanical mechanism.Through the research methods of numerical simulation,the surface movement and deformation law after large-scale mining and the movement deformation of the village are analyzed,and then the structure of the house,the geotechnical conditions of the village and the surface movement and deformation after mining are analyzed.The effect of superimposition on the destruction of village houses.Through geotechnical investigation and field investigation,it is found that the village is located on a hillside with a weak structural surface and three levels of terraces.The destruction of buildings on the first terrace is far more serious than the second and third terraces.The overall situation of the houses on the terraces is crushed and destroyed by the north to the south.The houses in the east of the village are mainly characterized by the east-west tensile failure.By analyzing the numerical simulation results of FLAC^3D,the village is located within the influence range of the mobile deformation basin formed by mining,and different degrees of surface movement and deformation have occurred.The settlement displacement of the village surface near the goaf is0.054m,and the horizontal displacement is 0.032m.In the vertical joints of the eastern part of the village,uneven settlement occurs,and horizontal movement occurs,causing cracks in the upper part of the house;the horizontal movement of the village near the goaf is 0.018 m,far from the village of the goaf.The horizontal movement is 0.028m,and the horizontal displacement of the movement to the goaf is generated in the south of the village,and the horizontal movement of the south of the village is smaller than that of the north of the village,which induces the stratum of the second and third terraces to creep along the weak structural plane,and squeezes the first terrace.In the stratum,the houses on the loose layer of the first-order terrace are squeezed from the east-west direction,and the destructive features of the extruded nature appear on the wall and the ground.The buildings in the east of the village and the south of the village are brick-wood and brick-concrete structures.The stability and resistance to deformation are not strong.The coal seam mining causes settlement and horizontal movement of the village surface,which interacts with unfavorable engineering geological conditions and induces the village to follow.The stable weak structure of the rock formation is squirming in the direction of the goaf,and the house is regularly destroyed.The destruction of houses in villages is highly correlated with the mining subsidence caused by coal mining.The protection of coal pillars reserved only according to the“three-down”coal mining regulations cannot fully guarantee the safety of village houses,and it is also necessary to combine the actual engineering geology of the buildings.Conditions for comprehensive analysis.