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Deep vertical shafts are critical passages for deep resource development, and their surrounding rock stability is essential to guarantee the safety and efficiency of mining. Aiming at the surrounding rock stability problem of shaft walls in broken rock mass, taking the Xiling mining area of Sanshandao Gold Mine as the engineering background, a three-dimensional numerical model of the vertical shaft was established by using the Bonded Block Model (BBM) in the discrete element software. The damage and failure characteristics of shaft walls at buried depths of 1 600-2 500 m were investigated, and six support and reinforcement schemes for shaft walls in high-stress and broken rock mass conditions were proposed. The results show that the deformation and failure behavior of surrounding rock in deep vertical shafts under high in-situ stress is affected by horizontal geostress. With the increase of buried depth, the maximum displacement and deformation range of shaft wall surrounding rock increase. The displacement in the maximum principal stress direction changes significantly, and the minimum principal stress direction is the main concentration area of shear stress. Broken rock strata increase the mechanical complexity of shaft wall surrounding rock, and the dynamic action of broken rock mass may cause spalling of rock blocks and failure of surrounding rock. Grouting bolts can effectively improve the stress state of the support structure and disperse the concentrated stress in the surrounding rock. After support, the displacement of the shaft wall is reduced by 53%-65%, and the shear stress concentration zone is transferred to the shallow part at 0.5-1 m depth of the shaft wall. For different buried depths, reasonable support and reinforcement measures can effectively control the dynamic action of broken rock mass and reduce the failure risk of shaft walls.

, authors=Guoyuan WANG, Pengxiang NIU, authorsList=Guoyuan WANG, Pengxiang NIU, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1322559921321784114, articleId=1322559920889770800, tenantId=1146029695717560320, journalId=1225396423026438145, language=CN, title=深竖井破碎岩体井壁破裂特征与支护加固技术研究, columnId=1226462294582936453, journalTitle=矿业研究与开发, columnName=深部、深海矿产资源勘探与开发, runingTitle=null, highlight=null, articleAbstract=

深竖井是深部资源开发的关键通道，其围岩稳定性对于保障矿山开采的安全与高效至关重要。针对破碎岩体竖井井壁围岩稳定性问题，以三山岛金矿西岭矿区为背景，采用离散元软件中黏结块体模型（BBM）构建三维竖井数值分析模型，研究1 600~2 500 m埋深条件下井壁的损伤破裂特性，提出了高应力－破碎岩层环境中井壁的6种支护加固方案。研究表明：高应力环境下深竖井井壁围岩的变形与破裂行为受水平地应力影响，随着埋深增加，井壁围岩的最大位移和变形范围增大，最大主应力方向位移变化显著，最小主应力方向为剪应力的主要集中区；破碎岩层增加了井壁围岩的力学复杂性，破碎岩体的动态作用可能导致岩块剥落和围岩破坏；注浆锚杆能够有效改善支护结构的受力，分散围岩中的集中应力。支护后，井壁的位移量减小了53%~65%，剪应力集中区向浅部转移至井壁深0.5~1 m处。针对不同埋深，合理的支护加固措施能够有效控制破碎岩体的动态作用，减少井壁的破坏风险。

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王国元（1974—），男，辽宁北票人，高级工程师，主要从事矿山地压与岩层控制研究。E-mail: wangguoyuan@chinacoal.com

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王国元（1974—），男，辽宁北票人，高级工程师，主要从事矿山地压与岩层控制研究。E-mail: wangguoyuan@chinacoal.com

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