DOI: 10.11799/ce202511013
Comparison on the mechanical performance of gangue-retaining structures in non-pillar roof-cutting roadway formation
ZHANG Haitao
LIU Yuxuan
TANG Jiarui
ZHAO Junpeng
ZHOU Jianlin
JIANG Hanze
CUI Jianbo
Abstract：To address the insufficient bending resistance of the roadway gangue-retaining structure,we took the No.4303 working face of Shaqu Coal Mine as an engineering case,and compared the I-beam and yieldable U-shaped steel gangue-retaining support structures.Through methods including theoretical analysis,numerical simulation,and field application,different gangue-retaining structures were compared.First,the force mechanism of the gangue-retaining structure was clarified through theoretical analysis.The structure is equated to a simply supported beam,and a mechanical model was established to compare and analyze the bending resistance of the two types of gangue-retaining structures.Second,ABAQUS numerical simulation software was used to establish models of I-beam and yieldable U-shaped steel gangue-retaining structures.The bending characteristics of the two structures under the same loading conditions were compared,as well as the bending characteristics of yieldable U-shaped steel gangue-retaining structures with different overlap lengths.The results show that the yieldable U-shaped steel gangue-retaining structure exhibits better bending resistance compared to the I-beam structure,and increasing the overlap length can improve the bending resistance of the gangue-retaining structure.Finally,on the basis of the above research,a reasonable field design scheme for the yieldable U-shaped steel gangue-retaining structure was proposed,achieving favorable field application results.
Keywords：roof-cutting roadway formationgangue-retaining structureyieldable U-shaped steelforce mechanismmechanical performance
Publication Date：2025-11-20
Online Publishing Date：2026-01-15(First online date of this platform, not the publication date of the document)
Pages：9( 96-104 )