Study On The Roadway Stability Analysis And Weak Broken Roof Rock Strengthen Supporting Research

Based on a lot of data and engineering field investigation, adopts theoretical analysis, numerical simulation and field observation methods, analyzed the surrounding rock deformation regularity of dynamic pressure roadway, Through theoretical analysis surrounding rock deformation characteristics and failure mechanism, and research interaction of anchor structure and surrounding rock, relationship of roof deformation and the surrounding rock, supporting and surrounding rock interaction and basic control approach; Through orthogonal numerical simulation experiment, reach eformation relationship between each affecting factor and dynamic pressure surrounding rock; By means of the finite element analysis of dynamic pressure roadway deformation and supporting, Through the continuum mechanics method research supporting structure and surrounding rock interaction obtain roadway support resistance, study its control technology and supporting protection forms, To cable and bolt support form force analysis, according to actual engineering to support optimize; Through the field data and the numerical simulation proceed roadway parameter design and inspection. Using field measurement to monitoring and feedback of combination supporting.1)Analysis deformation characteristics and destroy mechanism of mining roadway, the control principle of the surrounding rock, anchor structure and surrounding rock interaction. Using numerical simulation, analyses the mine pressure appeared and transformation characteristics of weak rock roadway under the different supporting forms. Combining comparative analysis of theory and practical engineering, to determine the surrounding rock damage provide rational support form and supporting technology.2)Through numerical simulation, under different roadway section size circumstances, to quadrature numerical simulatio of the surrounding rock deformation, reach the surrounding rock deformation and the factors relationship of roadway size, mining depth, lateral pressure coefficient, mining factor of stress concentration, supporting force and so on. Analyzing the primary and secondary factors of the influential roadway stability, study the relationship between the roadway deformation and influencing factors, find out affected significantly of test results as the various factors level change, for reasonable control of surrounding rock clear objectives.3)Research pressure appeared and supporting of weak surrounding rock roadway, using continuum mechanics method reflects surrounding rock stress state of after underground excavation. For surrounding rock of continuum mechanics model, based on the analytical method and results analysis surrounding rock limit deformation and the surrounding rock and the corresponding required minimum supporting force.4)Analysis pier supporting method influence and optimization of the roadway stability, combined with the other supporting form combination supporting obtained the optimization effect.5)During the mining of 104 working face,the mine pressure characteristics of 402 roadway with broken surrounding rock under the bolt, cable and anchor nets combination supporting and pier reinforcing supporting conditions has been studied by in-situ observation, and the reasonable strengthen support scheme and parameters have been put forward.