Research On Surface Movement And Deformation Law Of Shallow Buried Coal Seam Group In Loess Gully Region

Under the loess gully area,the law of surface movement and deformation will change with the stability of the slope in the loess gully region.The surface and even produce a series of geological disasters.If the coal seam group is mined and the surface movement and deformation are more complex.Therefore,it is very important to carry out the law of surface movement and deformation of shallow coal seam in the loess gully region,which is of great significance to realize safe production,ground disaster prevention and ecological protection of shallow coal seam in loess gully area.Based on the observation of the surface movement and deformation data of N1114 and N1206 working face in Ning Tiaota coal mine,the paper analyzes the deformation law of surface movement in this area,and uses the value of FLAC3 D The influence of repeated mining of the short distance coal seam group and the gully slope on the surface movement and deformation under shallow buried condition is analyzed.The main conclusions are as follows:(1)The effects of the superficial coal seam group on the surface movement of the coal seam are analyzed,and the main factors affecting the surface movement and deformation in the loess gully area are analyzed according to the law of the surface movement and deformation of the coal mine.(2)Based on the numerical simulation of FLAC3 D,the law of surface movement and deformation of single coal seam,close coal seam group and slope and slope reconstruction is analyzed.Through comparison and analysis,the repeated mining and loess Influence of slope stability on surface movement and deformation in gully region.(3)Based on the theory of probability integral prediction and the computer inversion simulation,the probabilistic integral prediction parameters and the sedimentation coefficient are modified,and a method to determine the subsidence coefficient of the subsidence coal seam in the loess gully region is given.Finally,the stability of the slope in the loess gully area is given,and the law of surface movement and deformation of the shallow coal seam in the loess gully area is given,which provides the scientific basis for the coal green mining,the prevention and sustainable development of the ground disaster and the sustainable development.