Numerical Simulation For Rock Stability And Support System Of Water-rich Laneway In Complex Baixiangshan Iron Mine

The construction and mining of a complicated water-rich iron mine is often endangered by water-inrush geologic hazards.Relying on the"the development and study on the crucial technology of exploring the complicated water-rich mine"(NO.2006BAB02A01), one of the national"11th Five-Year"science and technology supporting projects, the thesis has researched intensively on the geohydrologic environment and the water-inrush condition from faults in the typical complicated iron mine of Baixiangshan. By using fluid-solid coupling mode of 3D-dimensional finite-difference codes method for fluid flow in porous media (FFPM), Established to create different flow conditions surrounding the system clock fault dip through three-dimensional numerical model, The thesis has explored and studied the retain water rock pillar width at different the lateral pressure coefficient and the diffeent dip angle and risk of sudden the role of water law., as well as the influential action laws of inrush risk. The above research can provide the theoretical and practical help for prevention and control ground water of the water-rich deposit. The main works and contents are as flowed:⑴By using fluid-solid coupling mode of 3D-dimensional finite-difference codes method for fluid flow in porous media (FFPM) and abstracting the geological conditions of roadway through veins passing fault, numerical simulation model of adjacent rock systerm for water-transmissible fault is set up, and on this bais to further analysis of the impact of infrastructure and exploitation of deposits of water inrush phase of the main factors. And to explore the underground pressure, fracture, joint, fracture, impermeable layer and the aquifer and other factors impact on the role of water inrush deposit laws. On this basis, and summed up the experience control of water, find out the impact of deposit and the key factors of water inrush.⑵By using fluid-solid coupling mode of 3D-dimensional finite-difference codes method for fluid flow in porous media (FFPM) and abstracting the geological conditions of roadway through veins passing fault , numerical simulation model of adjacent rock systerm for water-transmissible fault is set up. And on this basis to establish through veins to expand roadway intersection with a different numerical model of the fault dip. Obtained at different lateral pressure coefficients under different fault dip water rock pillar width And to explore and study the changes of the system in the roadway Rock stress and strain field and the stability of surrounding rock and the risk sudden of the role of water law.⑶On the basis of numerical simulation for surrounding rock stability of fault passed by roadway through veins above the numerical-optimal simulation of pre-grouting programs for fault fracture zone also uses fluid-solid coupling mode of FLAC3D. Further explore the surrounding roadway excavation revealed a different side of the fault when the pressure of deformation and failure under the conditions of law. And different ways of supporting mechanism quantitative simulation of the pressure of certain conditions in the mines of different ways of reinforcing effects of support and damage likely quantitative analysis and optimization of different support scheme.