Research on Dynamic Process and Visual Simulation of Strata Movement in Mined-out Area

摘要

The overburden strata movement is a complicated dynamic process. In the process of strata's moving and deforming, rock mass has the property of rheology. At the same time, strata have different deforming in time-space process because of rock's laminar combinatorial structure. Based on the theory of thin plate flexure and rheology, the time and space process of the strata movement and surface subsidence are studied. The related formulas are derived to calculate the surface subsidence and time coefficient. A visual procedure simulated dynamic process of surface subsidence is developed in the light of powerful mathematics calculating and graphic function of the MATLAB software. Dynamic process of surface subsidence in a mine is predicted, result of prediction is in coincide with mine's long-term observation practical data. It also provides a new method to predict dynamic process of surface subsidence.