Research On The Deformation And Failure Characteristics Of Fissure Water Roadway

With the extension of mine exploitation, groundwater is one of the most important factors influencing the stability of surrounding rock of roadway. Slowly softening of roadway surrounding rock under the action of groudwater seepage, makes the surrounding rock fracture extending continuously. When the crack extending forms new breakthrough or damage evolution fissure, it became the cracks in the macro state. When they continue to evolve, it finally leads to instability and failure of rock mass. This changed the instability and failure of surrounding rock stress distribution state, which affected the displacement field distribution and the damage range of surrounding rock, thus greatly reduces the stability of surrounding rock. In order to strengthen the stability of roadway, to ensure the service life of roadway, it will be in-deep study of the roadway deformation failure and the supporting scheme of further research under complicated conditions. Based on the theoretical analysis, numerical simulation and the engineering practice, it analyzed stability of fractured rock mass under initial aquiferous state. First, based on the relevant theory of fracture mechanics and damage mechanics, it deduced rock mass damage and evolution constitutive model which under the stress condition of fractured rock mass of initial aquiferous state. Then under condition of Visual C++2008environment, taking FLAC3D as the development of software platform, and realize the secondary development of it. After the second development program related works were described in detail and validate the model. Finally, it combined with the engineering example of luling coal mine-590roadway in the fissure water affected by the overlying coal face mining, designed the support scheme, and using the constitutive model of development, for numerical simulation of the impact process. Through the numerical simulation and field test, it shows that the support scheme was effective control of roadway stability. It verified the feasibility of support scheme and laid solid foundation for mine safety production. At the same time, it also gave aquiferous fractured rock mass of roadway surrounding rock stability study providing an effective analysis method brought a certain reference value.