Study On The Surface Settlement Of Monitoring,Forecasting And Early-warning System In The Influence Area Of Underground Left Space

Land subsidence can cause permanent resources and environmental damage that can not be compensed.With the rapid development of our country's economy and regional industrialization degree is increasing day by day;the underground space is widely used.When there is a huge underground space within a region,this kind of settlement will cause the surface collapse suddenly,and subsidence area is larger,settlement can cause vehicles,surface structures and populations suddenly to fall into the sink,causing heavy casualties accident.If the underground space is also carrying on the engineering activities,the sudden collapse of the surface will cause that underground workers can't escape,and then the heavy casualties are caused by the accident.In order to prevent surface collapse suddenly induced by underground huge space.Based on the layout of GPS unattended monitoring network system located in the upper influence area of the underground mined-out area in Jinhong Industrial Park,a set of impact area of the surface subsidence monitoring,forecasting and early warning system is built so as to provide support for the temporary warning on the local surface suddenly collapse is.This work is as follows:(1)On the basis of unattended surface subsidence monitoring network system,the faulted line of the surrounding rock and the surface measuring point and the corresponding relation of underground mined-out area are determined;GPS ground subsidence monitoring data preprocessing method,loss of monitoring data processing strategy and setting method of virtual GPS are proposed.(2)By use of Daubechies compactly supported orthogonal wavelet denoising technology,monitoring data,denoising implementation process and the denoising effect analysis method was proposed;the monitoring data of the monitoring network change in denoising is done.(3)The definition and calculation methods of the surface subsidence deformation index is put forward,the monitoring of the entire regional subsidence process of three-dimensional figure and contour graph and comparison and analysis of settlement observation statistics process according to the time are made.(4)The subsidence trend analysis method based on nonlinear fitting and surface subsidence deformation of 3D surface fitting the overall trend analysis method are put forward,the surface subsidence deformation trend found method is proposed,and the surface subsidence deformation trend analysis is given,the GPS monitoring surface subsidence trend in horizontal direction x,y direction and vertical direction of the surface subsidence deformation trend is found;with the help of the neural network,surface subsidence randomness is predicted.(5)The approach to estimate the surface settlement within the scope of physical and mechanical parameters of rock mass,empty area support method to calculate the stress distribution of rock mass,the goaf collapse early warning parameters estimation and gob collapse implementation technology,and etc are put forward.