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Ground Deformation and Subsidence Mechanism of Old Mining Area

Author: XieXiaoLong
Tutor: WangMingWu
School: Hefei University of Technology
Course: Geotechnical Engineering
Keywords: Gob Subsidence mechanism Rock movement Numerical Simulation FLAC3D Probability integration method
CLC: TD325
Type: Master's thesis
Year: 2010
Downloads: 147
Quote: 1
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Abstract


With the increasing scarcity of land resources , in order to maximize the use of gob gob upper important to ensure traffic safety engineering and residential area , the corresponding goaf surface deformation and subsidence control technology , to carry out the mined surface deformation and old settlement mechanism has important social and economic significance . Paper, based on three-dimensional finite difference method for the actual coal mining old conditions , numerical analysis model was constructed , and then discusses the value of surface deformation mined old basic characteristics and rules , in order to reveal the mined on the old surface deformation and subsidence mechanism . Numerical simulation of draw the following preliminary conclusions : 1 ) was excavated at each seam after the overlying rock layers tend upper level area appears less stress tend to lower the larger phenomenon , with the excavation continues, the stress deviation becomes smaller . 2 ) changes in surface subsidence and deformation along the strike direction of curvature smaller and larger changes along the dip ; sinking basic to the point of maximum subsidence centered symmetrically . 3 ) After the overlying rock seam mining along the strike destroyed the main direction of development, in which a layer of coal mining after # overlying rock caving destruction, while other coal mining after the overlying rock breakage occurred . 4 ) surface subsidence numerical simulation results and probability integration method , surface mining subsidence measured values ??for years basically consistent . Research findings will help to control surface subsidence mined old , as old goaf foundation treatment technology provides a theoretical basis .

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CLC: > Industrial Technology > Mining Engineering > Mine the pressure and support > Rock pressure and rock movement > Rock movement
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