Optimization of support scheme for return air lane and numerical simulation study
JING Laiwang
CUI Ziqi
JING Wei
Abstract：This study addresses the complex issues of deep burial,high stress,and tunnel deformation in the 2803 return air tunnel of the Hetaoyu Coal Mine.The original support scheme was optimized u-sing advanced techniques,including the"differential strength support method for the upper and lower sides",the principle of"side support controlling the floor with strong floor support controlling the sides"and a rounded corner transition design for the side and roof.Numerical simulations were con-ducted to assess the performance of the improved scheme.The results indicated that the modified ap-proach effectively reduced the radius of the plastic zone in the surrounding rock,significantly sup-pressed rock deformation,and enhanced tunnel stability.Subsequent field verification confirmed that the improved support scheme successfully controlled tunnel deformation in the test section,demon-strating superior performance compared to the original support plan.
Keywords：combined supportingsurrounding rock deformationnumerical simulationplastic zone of surrounding rockbottom angle anchor rod
Publication Date：2025-04-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 41-47 )