Application of Improved Logistic Function Model to Prediction of Surface Subsidence

In order to accurately predict the surface subsidence caused by shallow seam mining under the conditions of thin bedrock and thick loose layer, accordin g to the defects of the Logistic time function model in predicting the surface subsidence caused by shallow seam mining, the authors put forward the improved Logistic t ime function model, and achieved the expression of the surface subsidence caused by shallow seam mining eventually.The practice results showed that the maximum r esidual value of the expected surface subsidence by improved Logistic model was reduced from previous 340.2 mm to 65.2 mm with traditional Logistic model.The relati ve error was reduced from over 10% to less 10%.The improved Logistic function model would have higher precision than traditional Logistic function model.