| Due to serious mine pressure phenomenon and severe deformation of roadway, itis very important for mining engineering to study on overburden strata movementtheory and control technology in large section roadway. Through the deep base pointMultipoint Displacement Meter and borehole TV peeping method, numericalsimulation and theoretical analysis, revealed a large section and high stress miningworking face roadway instability failure mechanism, put forward the working facewith large mining height of strata movement through the compound key strata theoryto analysis and calculation. Analysis shows that large section and high stress miningarea working surface periodic caving span length is mainly distributed in the [9m,14m], and has a normal distribution characteristics. Studies indicated that large sectionthat high stress mining area of overburden strata subsidence change along with themining and changing all the time and spatial dynamic change process, the simulationresults of FLAC into3D Surfer software acquired the3D movement law of overlying strata, it can directly obtain the large section and high stress mining area of upperglobal dynamic deformation of rock. Research on bolting support in that pre.stressed isa key parameter, to Wuyang Coal mine large cross section and high stress miningworking face roadway, should choose strength, the large diameter high strength bolt,analysed typical working face return air roadway deformation and failure, thepre.stressed anchor bolt and anchor cable supporting system. The supporting designscheme, and the adhering to the large section and high stress mining working faceroadway bolt support design method of dynamic information, make full use of theconstruction process to provide various types of information, real.time informationcollection, information analysis and information feedback, can in large section andhigh stress mining area working surface surrounding rock control achieved goodresults. |
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