By adopting the combined method of field measurement and numerical simulation, using the UDEC numerical simulation software,the paper researches qualitatively and quantita-tively the stress,deformation and failure mode of the bolt-supporting surrounding rock of the large-section roadway in 1 5# coal seam of Guanlingshan Mine,and then obtains the reasonable bolt length,diameter,row spacing and other supporting parameters.%采用现场实测与数值模拟相结合的方法，运用 UDEC 数值软件定性与定量研究了关岭山煤矿15＃煤层大断面巷道锚杆支护围岩的受力、变形及其破坏方式，经综合比较得出了合理的锚杆长度、直径和间排距等支护参数。
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