Evaluation Of The Surface Subsidence On Expressway

Highway construction has become increasingly widespread with China’s rapid economicdevelopment, inevitable to go through mine, and the current domestic and internationalimpact on mining subsidence on the highway is still in the preliminary stages of research, Atpresent, domestic and foreign mining subsidence on the impact study on the highway is still ina preliminary stage. In this paper highway through the entire longwall caving mining methodformed by mining subsidence area, for example, on the impact assessment of the highwaywere studied.Analyzes and summarizes the impact of geological and mining subsidence factors, andthe use of gray relational theory to the degree of influence of these factors were sorted.Analysis of the existing level, and tilt gently inclined seam subsidence prediction modeladvantages and disadvantages and conditions of use, on the basis of existing models has beenimproved, and the form of the model k parameters are discussed, which is derived by theimpact of surface subsidence factors determined using least squares method to determine thevalue of the parameter k, the parameter can be determined using the matlab function graphsdrawn by the comparison of the measured data curve may indicate improved model isreasonable. After discussing spatial functions, we discuss about a function of time. Byanalyzing the amount of sinking, sinking and sinking speed acceleration as a function of thetime function model and its various improved rationality discussed and then come to one ofthe most reasonable model, this paper on the basis of the model on the discussion of themodel parameters c and j, the physical meaning of these two parameters is derived fromsurface subsidence caused by factors. And summarizes the previous scholars on the methodfor determining the parameters c, using the least squares method to determine the parameters j,the parameters can be determined using the matlab function graphs drawn through the datawith the measured contrast curve to illustrate the reasonableness of the time model. Combinedeffects of mining subsidence on the highway characteristics, and current effects of miningsubsidence on the highway to allow conditions to establish mining subsidence impacts on the freeway spatial and temporal scales evaluation. The evaluation method used for the highwaythrough the entire cross off the longwall mining method manager roof level, slowly tilted orinclined seam gob formed an important guiding significance.