Study On Deformation Of Underground Roadway Caused By Excavation

With the development of society and the technology improving, the utilization ofunderground space has become the main method to solve the shortage of ground space. About1970s underground cavern has been widely used as a transit or reserve oil depots. Because of thisoil depot has low cost, covert security, conservation of land, do not pollute the environment andlow fuel consumption.1950, groundwater closure hole library projects in foreign countries(Sweden, United States, South Korea, etc.) have been built to run to dozens of countries havemore than200seats groundwater seal oil depot run. Therefore, such works selected libraryfeasibility studies, design theory, construction technology and operation management has beengradually improved.In order to study the law of surrounding rock deformation caused by the undergroundcavern roadway excavation, study the roadway of CATK0+700m~720m, combined with thegeological conditions of the roadway, engineering conditions, roadway design, constructionprogram and other related information, by analyzing the measured data for process monitoringand measuring, the displacement of the wall surrounding rock convergence and vault sinkvariation, but also by the internal displacement of the surrounding rock. By the law surroundingconvergence and vault sink can make effective recommendations for the construction programand supporting programs. Analysis of the surrounding rock displacement, speculated that theimpact on the surrounding wall rock excavation of the roadway distance.Combined with field monitoring data, engineering data and experimental results of theamount of control, using FLAC3D numerical simulation analysis method, select the appropriateconstitutive model and parameters for numerical simulation analysis, roadway excavation andsupport care. Through the contrast analysis of the simulation results with the monitoring dataaround convergence, vault subsidence and anchor stress to verify the correctness and rationalityof the model simulation. The application of this model can provide reference and guidance forthe follow-up project and the main cavern excavation. The model can also be applied to similar projects.