The Research Of Anxiliary Shaft’s Failure Mechanism And Deformation

Since1987,The Huaibei、Xuzhou and Datum mining area of East China’s vertical shafts have destroyed one after another,so far,there are about sixty vertical shafts in thick alluvium have destroyed in the range of China.Non-mining fracturing of shaft lining is a special engineering geologic hazard,it often seriously affects the normal operation of the mine,endanger the safety of the mine production,forcing some mines to stop product,which cause significant economic losses.This paper recommends the principle and method of modeling about GM(1,1). In accordance with the grey system theory, the Grey model prediction GM(1,1) was compiled, and the new-information model GM(1,1) which could reflect the engineering dynamic change was set up.The ultimateness illustrated:the maximum residual error of predicting data of the auxiliary shafts headframe foundations, the vertical compression of "Danan" and the vertical compression of "Dabei" was0.62>0.11and0.03mm, and the accurate levels received the highest level. And then the next sedimentation value for the monitoring point was forecasted.This paper recommends the fundamental of Fast Lagrangian Analysis of Continua in3Dimensions(numerical simulation with FLAC3D), and according to the mechanical parameters of Tongting mine’s vertical shafts and the hydrogeological conditions of industrial square, established numerical simulation model of vertical shafts, divided into four seepage experiments. Respectively in the process of the damage to the wellbore in the four experiments, carry out coupling numerical simulationis to the interaction of water、soil and shaft, and corresponding some analysis and prediction, Determine the process and mechanism of vertical shaft destoryed under the influence of non-mining. It shows that numerical simulation with FLAC3D are feasible on destroy analysis and forecast of vertical shaft in comparison with observation data, And it will provides new methods and theories to govern the similar to the geological and mining conditions of the mine disaster.