煤矿安全2024，Vol.55Issue(10)：111-119,9.DOI:10.13347/j.cnki.mkaq.20230934
膨胀性泥岩地层斜井支护优化研究
Research on support optimization of inclined shaft in expansive mudstone formation
摘要
Abstract
Aiming at the design problem of inclined borehole wall in expansive mudstone formation in eastern Mongolia,a theoretic-al model of circular borehole wall under the combined action of uneven ground pressure and expansive contact pressure is estab-lished based on elastic mechanics theory.The analytical solution of borehole stress and displacement under the combined action of uneven ground pressure and expansive contact pressure is obtained.The influence of wall thickness on wall stress and displacement is studied.Based on the thermal coupling module of FLAC3D,the optimization scheme of different shaft thickness is simulated,and more reasonable supporting parameters are determined by optimizing shaft section and supporting form.The numerical results show that when the outer shaft wall reaches 600 mm and the inner shaft wall reaches 600 mm,the influence of increasing the shaft wall thickness on the displacement and deformation is not obvious.The optimized support scheme can effectively resist wellbore deform-ation in expansive mudstone formation.关键词
泥岩/冻结法施工/膨胀接触压力/斜井/弹性力学/井筒支护/支护优化Key words
mudstone/freezing method construction/expansion contact pressure/inclined shaft/elasticity/shaft support/support optimization分类
矿业与冶金引用本文复制引用
韩天宇,单仁亮,吴浩田,乔东杰,许镇宇,白瑶..膨胀性泥岩地层斜井支护优化研究[J].煤矿安全,2024,55(10):111-119,9.基金项目
国家自然科学基金资助项目(52304108) （52304108）
