Study On Mine Subsidence Dynamic Prediction Model

Surface movement and deformation caused by underground mining is a complexprocess of time and space. It is necessary to analysis of the influnce of the buildingsabove the goaf caused by underground mining. Sometimes, only rely on the finalresults(static values) of various indicators can’t make damage assessment well, alsodepend on the changed processes of these indicators(dynamic value). Therefore, in orderto improve the measures to solve the problem of mining under buildings, water, raily,the study about the dynamic process of mining subsidence is more and more important.Mining subsidence is a complex physical process of first accelerating and then decelerating,the curve of the subsidence varying with time presences “S” shape generally. Wherefore, it canbe used to described the dynamic process of mining subsidence not only need to be able to fittingbetter " Subsidence-Time" curve, also need to meet the time-varying physical process of miningsubsidence. This paper comprehensivly analysis of the current situation of domestic and foreignresearch, researches the real regulation of the ground subsidence caused by underground miningsurface varying with time and space, summed up the common dynamic analysis time function ofground subsidence bases on the probability integral method, and discussed the applicability ofthem in the mining subsidence, put forward a coordinate-time function of the surface dynamicmovement and deformation, and found the method of calculating the dynamic process of surfacemovement based on this function model. On this basis, dynamically predicted the N2701working face combined measured data in a certain mining area, and realized visualization of theexpected results applying the MATLAB software, by analyzing the precision of the expectedresults, proved this model can be more better used to describe the dynamic process of miningsubsidence, powerful generalization, which has the important theory significance andengineering application value for preventing and controling the subsidence disaster.