Study On Deformation And Failure Characteristics Of Distributed Floor Of Distributed Fiber

Coal is an important basic energy and chemical raw material in China.With the depth of coal resources and mining will continue to extend to the deep extension and expansion of its mining conditions also will change,mine water pollution prevention and control will face more technical problems.It is of great practical significance to study the deep and effective development of coal resources,to realize the potential exploitation of old mines,to replace the new and old mines and to sustainable development of China's coal industry.In this paper,through the development of the theory and technology of floor deformation and destruction,the research status and important academic achievements and development trend of the bottom plate deformation and damage are grasped and grasped.The distributed fiber-optic fracturing test is carried out by using the advantages of distributed optical fiber linear measurement.The feasibility and reliability of the distributed fiber in the rock rupture evolution test are studied.Based on the indoor test basis and the geological conditions of the engineering site,the monitoring system of the coal seam floor drilling optical fiber sensor is constructed.According to the variation of the strain field Response,testing and analysis of coal seam floor failure and mining process in the relationship between time and space.The results show that the error of the MTS test system is 13.2%in the fracture test of the distributed fiber.At the same time,the distributed fiber test technology is used to obtain the deformation characteristics of the bottom of the stope in the mining process,and the failure state of the bottom plate is obtained dynamically.The depth range of the damage zone of the stope is 0-7.2m and the disturbance depth is 7.2-26.3m,lead stress range of 36m.The feasibility and effectiveness of distributed optical fiber for rock mass rupture evolution test are studied,which can provide reference and ideas for macroscopic damage evolution of rock mass and macroscopic fracture failure of field engineering rock mass.Refinement and quantitative interpretation of deformation and failure of floor slab in engineering application.The application of new technology is beneficial to comprehensively and fully understand the deformation and damage of the floor and the displacement of the strata,which is of great practical significance and guiding significance to the prevention and control of the water damage in the bottom of the mine and the stability of the stope.But the application of technology in the construction,coupling,interpretation and other aspects are still inadequate,need further study.