RESEARCH ON DEFORMATION AND SUBSIDENCE CHARACTERS OF GROUND AND SURROUNDING ROCK INDUCED BY UNDERGROUND MINING UNDER THICK COVERING TERRAIN BY MODEL TEST
Abstract：Based on the prototype of the mine，by applying the physical simulating test，not only the ground¢s deformation and subsidence characters but also the wall rock¢s deformation and failure characters around the goaf are analyzed deeply. In the meantime，the failure mechanism of the wall rock around the goaf，the time effect characters of the wall rock¢s deformation and the ground¢s deformation and subsidence. Compared with the some corresponding numerical simulating results (2D，3D elasto-plastic FEM，2D discrete element，etc.)，that the physical simulating result is more accurately close to the in-situ monitoring result than that of the numerical simulating results，is discovered. Some new revelatory realizations that could not be obtained from many numerical simulating methods are obtained from the test. The optimum original-mining depth and some new realizations from the results of the test are accepted and adopted by the mining company. It makes significant directive role in the real engineering.
