Abstract
This article takes the transportation channel of the 2507 working face as the engineering background to carry out the analysis of the surrounding rock failure mechanism of the roadside filling in gob-side entry retaining of large mining height panel, and summarizes three common forms of instability failure of the filling wall. The method and idea of using a combination of “strengthened support + roof cutting pressure relief” to control the surrounding rock of gob-side entry retaining of roadside filling is determined. In theory, the optimal range of roof cutting height and roof cutting angle was obtained, and an innovative introduction of deviatoric stress analysis index was made. Numerical simulation research was conducted on the distribution characteristics of deviatoric stress in the surrounding rock of the gob-side entry retaining under different roof cutting heights, roof cutting angles, and wall width conditions. The optimal parameters for roof cutting and pressure relief of the gob-side entry retaining of roadside filling in the high mining face were obtained. The on-site engineering practice shows that after adopting the joint control technology of “strengthening support + roof cutting pressure relief”, the displacement of the surrounding rock of the retained roadway, the force of the anchor cable, and the bearing capacity of the flexible formwork wall are all within the normal range, ensuring that the retained roadway can continue to be used by the next working face.
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Funding
This work was supported financially by the Key Research and Development of Lvliang City (Project No.2025GY20) and Research Fund of State and Local Joint Engineering Laboratory for Gas Drainage & Ground Control of Deep Mines (Henan Polytechnic University) (SJF202503), Fundamental Research Funds for Universities in Xinjiang Uygur Autonomous Region (Project No. XJEDU2025J141), Fundamental Research Program of Shanxi Province (202303021222249) and Key R&D Program for the Introduction of High-level Scientific and Technological Talents in Lüliang City (2023RC19).
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Weiyong Lu: Writing–review & editing, Resources, Project administration, Funding acquisition, Methodology, Formal analysis, Data curation, Conceptualization.Shengjun LI: Writing–review & editing, Writing–original draft, Visualization, Validation, Software, Conceptualization.Yaohui Sun: Writing–review & editing, Validation, Investigation.Tao Gao: Investigation, Data curation.Wansheng Mi: Supervision, Resources, Project administration, Conceptualization.Xiaowu Zhang: Investigation, Data curation.
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Weiyong, L., Shengjun, L., Yaohui, S. et al. Research on surrounding rock control technology of roof cutting and pressure relieving for roadside filling in gob-side entry retaining of large mining height panel. Sci Rep (2026). https://doi.org/10.1038/s41598-026-37916-x
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DOI: https://doi.org/10.1038/s41598-026-37916-x
