Research On Surrounding Rock Deformation Characteristics And Support Technology Of Gateway Near The Fault

When parallel fault excavation roadway In the near faults,the degree of development of fractures in coal (rock) body is increased with the smaller distance from the fault plane, And because the fault make media is not continuous and cause the initial stress field perturbations, some areas produce additional stress, the pressure on the pillar mainly concentrated in irregular small pillar, that is the pressure peak near the fault in the middle of the side pillar and pillar the narrower, the higher peak pressure, the compressive strength of coal pillars is the limit of the pressure effect, thus it's very important that the width of the pillars and the way of support to roadway rock deformation which nearby the fault.This paper combination of theoretical analysis, numerical simulation and field measurement method, analyzed the deformation characteristics of roadway's rock which nearby fault in order to maximize the recycling coal resources.Maibly analysis the fault pillar palstic zone, and derivation fault pillar palstic zone formula on the theroy analysis. Design eight scheme that about leave width of pillar in the simulation, according to numerical analysis software simulation FLAC3D, simulates the different gateway location, analysis and comparison surrounding rock deformation results and then analysis the bolt at different parameters' influence rock deformation by a simulation, obtain science and reasonable parameters of bolt, and using the final simulation results at bolting parameters, determine the final reasonable size of coal pillar of fault.At the same time,analysis and study of rock deformation characteristics at impact of mining, Provide the basis for Face advance support distance.Through field monitoring analysis of the roadway deformation, the design of the roadway location and the support system and scenarios,that effectively solve the problem of stability which roadway nearby fault face and effiectivelly control roadway deformation.Prove by practice, The reasonable location of roadway and support parameters for reclaim the resources as possible provides effective support scheme and there are very important reference value.