Prediction Of Surface Subsidence Based On Elastic Thin Plate Theory

Coal is China's main energy source,with a production of 4 billion tons in 2017,ranking first in the world.The large-scale development of underground coal resources leads to ground subsidence and a series of ecological environment damage and social contradictions.The study of surface subsidence prediction is of great significance for controlling surface subsidence and safe underground mining.At present,the methods of surface subsidence prediction in mining area mainly include profile function method,typical curve method,probability integral method,etc.Although these methods have been applied to the actual production and have achieved certain application value,they also have some shortcomings,such as complex model,many factors considered,large calculation error,lack of fresh and intuitive,or can only be used under certain preconditions,which to some extent limits the application in practice.The essence is that the above research methods are all mathematical models based on the basic principles of statistics,without careful use of mechanical principles.In fact,the surface subsidence caused by underground mining in mining area is a very complex process of mechanical change,and the displacement is the body of deformation and the result of stress.Therefore,this study makes every effort to use the measured data of a mining area in the EastThe law of surface subsidence caused by underground mining in mining area is studied with the principle of mechanics.Based on the theory of elastic thin plate mechanics,establish the prediction model of surface subsidence,select the measured data of mining area to solve the engineering parameters in combination with the basic theory of surface subsidence;use Excel to draw the results of the prediction model of surface subsidence,compare and analyze with the probability integral method and the measured data,check whether there are abnormal values and check whether they meet the accuracy requirements.The experimental results show that the predicted model based on the elastic thin plate theory has a high agreement with the measured results,and the model is simple and intuitive,which is suitable for practical engineering.The research of this subject has important theoretical significance for the rational development and utilization of underground resources.The principle of elastic mechanics is applied to the prediction model of mining subsidence,and the prediction model of mining subsidence is discussed from the angle of mechanical principle,which provides the prediction method for underground mining.