Study on Surface Subsidence Laws of Tuzhu Coal Mine of Jinzhushan and Its Grey Predication Model

On the basis of the soil conditions in Tuzhu Coal Mine of Jinzhushan Mining Company,the mechanism of surface subsidence and collapse was analyzed according to the vertical zoning model of fissures in mining theory.It is proposed that,to ensure the safety of human activities on ground,the actual displacement of surface in the mining phase should be observed,and the surface subsidence curve should be obtained through processing these observing data.In the late stage of mining,the surface subsidence is predicted based on grey model,that is,with the actual observation data of the surface as the original history data sequence,the grey Logistic model is built and the surface subsidence is predicted.The test results show that the prediction precision for this grey Logistic model is high.This model can reduce the outlay of surface subsidence monitoring and provide real-time warning information,so as to ensure the security of people and properties in exploitation regions.