Research on reasonable layout of high stress roadway and strengthening control of surrounding rock supporting in isolated coal pillars
Yang Yiyin
Zhang Ningbo
Zhang Weiye
Feng Pan
Zhou Tao
Pei Hong
Abstract：Taking No.13208 haulage roadway driven in the isolated coal pillar of Maodi Coal Mine as the research object,the high stress redistribution and surrounding rock deformationand failure evolution characteristics induced by roadway driving disturbance in isolated coal pillar were analyzed,and the combined supporting parameters were optimized.Theoretical analysis was conducted on the lateral stress distribution of coal pillars and the characteristics of the limit equilibrium zone,proposing reasonable locations for roadway layout.Simulation analysis was performed on the stress distribution and deformation of surrounding rocks under different coal pillar widths.A combined supporting technology of bolt-mesh-anchor and U-steel shed was proposed,and reasonable supporting reinforcement parame-ters were determined.The"shallow-deep"grouting reinforcement method was proposed to enhance the self-bearing capacity of frag-mented coal and rock masses,and the grouting reinforcement scheme was determined.The on-site implementation results indicate that the optimized supporting scheme has reduced the deformation of surrounding rock,improved the stability of the gob-side roadway within the coal pillar,and achieved good barrier effects.The research provides technical support for the layout of high stress roadways within i-solated coal pillars and the strengthening control of surrounding rock under similar conditions.
Keywords：isolated coal pillarroadway layoutreinforced supportinggrouting reinforcementseparation deformation
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：11( 109-118,126 )