Based On PSO-SVM Shallow Buried Deep Above The Old Mining Area Safety Analysis Of Building(Structure)

With the continuous exploitation of coal resources and the development of economic construction,a large number of construction(structure)structures will be built above the mining area.The scope of construction will be large and the service life will be long.In recent years,damage to the surface and buildings caused by the collapse of the mining area has occurred.Therefore,the study of the mechanism of "activation" of the old mining area and the study of the safety of the structures built above the shallow buried old mining area,It is of great practical significance to realize the safety of surface construction(structure)and the utilization of mine clearance area.Firstly,the basic Geological profiles of coal mine geology and hydrogeology in the area were collected and the physical and mechanical parameters of rock formations were determined by means of indoor rock mechanics experiments.By studying the "activation" mechanism of the old goaf area and the additional internal mechanics of the surface deformation on the building,the influence mechanism of the surface movement and deformation on the building is analyzed,and the additional force formula of the building caused by the horizontal and vertical deformation of the surface is derived.In combination with the accident tree and MATLAB,the main control factors are mainly mining life,building structure and stiffness(including building load and building span),earthquake,mining area size,mining depth,mining thickness,and loose layer thickness.The mining thickness,mining depth,building height,and building span factors are selected from the aspects of mining technology,hydrogeology factors,and buildings themselves.FLAC3D is used for numerical simulation to analyze the impact of changes in different major factors on the safety of surface construction(structures).degree.Finally,PSO-SVM(particle swarm support vector machine)was selected as the evaluation model,and the safety prediction of the building(structure)built above the old mining empty area based on PSO-SVM was built,and the MATLAB simulation training was adopted.The optimal penalty factor C and the kernel function parameter ? of the support vector machine prediction model are 539,9462 and 301.2965,respectively;The results of the prediction are compared with the actual situation,and it is proved that the thickness,depth,height,span of the building,etc.of the mining are the main factors affecting the safety of the construction(structure)above the shallow deep old mining area.The results show that the PSO-SVM evaluation model is suitable for evaluating the safety of structures built above shallow buried areas.