Research on roof cutting and pressure relief roadway protection technology for close range coal seam group
Liu Jinhu
Wang Guanzhao
Abstract：Addressing the severe deformation and maintenance challenges of roadways caused by repeated mining and intense dynamic pressure under the influence of hard roofs in close range coal seam group,a study on roof cutting and pressure relief technology was con-ducted based on the closely spaced coal seams of a certain mine.Through UDEC numerical simulation,the parameters of roof cutting height and angle were optimized,and the effects of roof cutting and pressure relief were comparatively analyzed.The research results in-dicate that a roof cutting angle of 15°and a roof cutting height of 19 m can significantly enhance the stability of surrounding rock in roadway.A reasonable roof cutting and pressure relief scheme was formulated,and the on-site application effect was good.The deforma-tion of roadway roof and floor,both sides,and coal pillar side was significantly reduced,and the stability of surrounding rock of roadway was effectively controlled.
Keywords：roof cutting and pressure reliefclose range coal seam groupnumerical simulationroof cutting angleroof cutting height
Publication Date：2025-12-30
Online Publishing Date：2026-01-31(First online date of this platform, not the publication date of the document)
Pages：6( 218-223 )