关键词: 地下铁矿, 进路断面, 进路尺寸, 正交试验, 数值模拟

Abstract: With application of the numerical simulation and the field monitoring，the sectional shape and dimension parameters of upward drift in Xiaoguanzhuang Iron Mine are investigated.Stresses of four typical drift cross-sections are simulated，including rectangular，semicircular arch，three heart arch and hexagon section.According to the distribution of plastic zone，principal stress difference and displacement deformation around the drift，the hexagon section is chosen as the most reasonable section shape，combining with the displacement monitoring data in testing stope.According to the effects of drift height，width and length on stope，and through analyzing orthogonal tables including the maximum principal stress，the minimum principal stress and vertical displacement，the optimum parameters of drift are determined as width 3.5 m，height 3.5 m and length 60 m，which have been successfully applied in field mining.These researches provide theoretical guidance for the design of the filling mining in Xiaoguanzhuang Iron Mine，and provide reference for similar mines.

Key words: Underground iron mine, Drift cross-section, Size of drift, Orthogonal experiment, Numerical simulation