Research On Subsidence Control Of Deep Thick Coal Seam And Its Application Based On Strip Mining Method

Aiming at the background of the deep coal seam in the west area of Hongyang Mine.In order to maximize the exploitation of coal resources under the village to solve the deep strip of the surface movement and deformation laws,size design and deformation prediction and other issues,to achieve safe and stable mining and sustainable mining,the choice of deep thick coal seam mining technology and theory of the village The geological subsidence principle of the mining area,the overlying strata and the deformation of the surface movement are analyzed,and the parameter analysis of the regional probability integral method is carried out to provide a technical solution for realizing the settlement control of the mining area.The influence factors,mining size design,calculation method and parameter estimation of deep coal seam coal seam are studied and summarized.At the same time,the numerical simulation model of FLAC~3DD software is used to establish and analyze the deep coal seam The relationship between the main influencing factors of subsidence and the law of surface movement and deformation is analyzed.Finally,according to the specific mining situation of the third part of the west of Hongyang No.2Mine,the optimal design of the mining and the prediction of mining subsidence are carried out.The main work and conclusions are as follows:(1)In-depth analysis of the technology and theory applicable to the exploitation of coal under the village,the specific application of the strip mining technology in the deep coal seam mining is carried out according to the concept and applicable conditions of the strip mining,and the surface movement deformation Regularity,mining subsidence mechanism and the basic characteristics of surface subsidence.Based on the theory of limit analysis of roof rock under the action of axial force,the mechanical model of roof rock formation in goaf is established,and the mechanical model of roof rock is analyzed and the maximum bending deformation value of roof is calculated.(2)To study the geological mining and surface conditions of deep coal seam in the deep coal seam of the village,and to determine the geographical location and surrounding area of the mining area.The geological mining conditions of the coal mining area,including the stratigraphic distribution of the mining area The characteristics of the formation,the stratigraphic characteristics and the available coal seam and the occurrence of coal mining and the occurrence of coal mining and the occurrence of coal mining area,taking into account the conditions such as hydrogeology and engineering geology of the village under the coal mining area,the deep coal seam mining and mining subsidence mechanism and the surface The study of moving deformation laws provides preparatory work.(3)According to the technical characteristics of strip mining in deep thick coal seam,in order to realize the exploration and mastery of the law of surface movement and deformation of deep thick coal seams,the mining conditions of simplified mining area are simplified,and the ideal numerical simulation model of FLAC~3DD software is established.According to the influence of deep And the different laws of the subsidence of the coal under the influence of different mining depth,different mining thickness,different width and width and different recovery rate under the influence of different conditions,The relationship between the main influencing factors of surface subsidence and the law of surface movement and deformation.(4)According to the previous analysis results,the application and analysis of the deep coal seam in the deep coal seam of the village are carried out,and the reasonable width,width and recovery rate are designed,and the safety and stability of the coal pillar are analyzed.It is expected that the software should be used to predict and analyze the deformation and deformation of the mining surface,and a reasonable mining technology scheme should be established to carry out effective mine subsidence control to ensure the safety and stability of the mining area.