Study On Groud Deformation Mechanism And Numerical Model Prediction Research

With the development of industrialization and urbanization in China,the shortage of land resource is becoming increasingly scarce,and many infrastructure such as civil buildings,industrial plants,highways and railways have to be built on or through mining areas.The existence of mined out area has a great impact on the stability of the surface.Therefore,in order to ensure the safety of the traffic and civil and industrial buildings above the mined-out area of the mining area,such as the destruction of the surface buildings caused by the subsidence caused by mining,The impact of surface movement and deformation on the mining area of China's land use and planning and construction has great social and economicsignificance of mining land recovery and construction in our country.Based on the study of mined-out area in Wang Jiata area,this paper studies the surface movement and deformation of goaf area,and obtains the following results :(1)The results show that the numerical method is not the same as the monitoring results,and it can be applied to the prediction of mining subsidence.The results show that the numerical results are in good agreement with the monitoring results,Applicable to mining subsidence prediction.(2)Study on the movement law and denaturation characteristics of the overlying strata and the surface of the goaf,the study of the zonal zone and the formation mechanism and the failure mode of the zoning zone,and analyzed the movement law and its characteristics of the surface subsidence basin.Based on the finite difference software FLAC3 D,the numerical simulation test is carried out to discuss the influence of mining factors on surface deformation and analyze the mechanism of surface deformation.(3)Through the consolidation of the geological data in the study area,the finite difference software FLAC3 D was used to establish the numerical model,and the influence of the underground mining on the surface deformation in the Wang Jiata mining area was analyzed and calculated.The law of surface subsidence and horizontal movement and internal stress distribution The The results show that the numerical method is not the same as the monitoring results,and it can be applied to the prediction of mining subsidence.(4)Comparison of wall and column mining methods,from the ground subsidence,plastic zone distribution,economic analysis of three aspects of the impact of mining on the surface.(5)A prediction system for multiple mining of random shaped face based on MATLAB is developed.Using the probability integral method to check the study area to determine the correctness of the forecast results.