煤矿安全2025，Vol.56Issue(5)：143-152,10.DOI:10.13347/j.cnki.mkaq.20231689
厚松散层薄基岩条件下马头门支护结构优化分析
Optimization analysis of ingate supporting structure under the condition of thick loose layer and thin bedrock
摘要
Abstract
Aiming at the technical problems of ingate support under the condition of thick loose layer and thin bedrock,taking ingate of Dongfeng Well in Qinan Mine as the engineering background,we analyzed the original support design scheme by using FLAC3D,and explored the distribution law of stress field of ingate lining and the vertical displacement evolution law of overlying thin bed-rock;we proposed the optimization design of ingate support structure,and verified the reliability of the optimized support scheme by numerical simulation and field measurement.The results show that:the original support scheme exhibits evident stress concentration in the ingate lining,excessive vertical settlement displacement in the overlying thin bedrock,and a high risk of support failure.Fol-lowing optimization of the support scheme,there is a reduction observed in the maximum principal stress of the ingate lining,vertic-al settlement displacement in the overlying thin bedrock,and plastic zone volume of the support structure.On-site monitoring shows that the maximum monitoring pressure exerted by surrounding rock does not exceed 20%of the warning value,and the maximum tensile stress experienced by steel bars remains below their yield strength.These findings validate the reliability of the optimized sup-port scheme.关键词
围岩控制/厚松散层/薄基岩/马头门/围岩稳定性/支护结构优化Key words
surround rock control/thick loose layer/thin bedrock/ingate/surrounding rock stability/support structure optimization分类
矿山工程引用本文复制引用
冯吉昊,荣传新,石浩,李承涛,安刚建..厚松散层薄基岩条件下马头门支护结构优化分析[J].煤矿安全,2025,56(5):143-152,10.基金项目
安徽省优秀青年科技基金资助项目(08040106828) （08040106828）
安徽省博士后研究人员科研活动经费资助项目(2023B726) （2023B726）
中铁四局集团川藏铁路项目技术开发重大专项资助项目(2022-CZ-02) （2022-CZ-02）
