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Aiming at the surrounding rock control problems of gob-side entry retaining under the condition of deep water-rich composite roof, the support design and stress analysis were carried out. By analyzing the influence mechanism of composite roof structure and water-rich environment on surrounding rock stability, the limitations of traditional support methods in controlling continuous deformation and floor softening were pointed out. The collaborative control technology system was proposed as follows. Firstly, the constant resistance anchor cable with a length of 11.8 m was used for three rows of vertical roof support, and the two-way shaped charge blasting roof cutting technology was combined to block the lateral stress transmission in the goaf. Secondly, "one beam and four columns" hydraulic support was set up in the dynamic pressure area to strengthen the support. Thirdly, in the drenching section, C20 concrete bedding and grouting anchor cable joint technology were used to control the water seepage softening of the bottom plate. The engineering application results show that the proposed control system reduces the time from severe deformation to stability by more than 40%, the maximum cumulative convergence of the left side of the return air chute is controlled within 940 mm, and the floor heave is significantly reduced within 660 mm. The proposed collaborative control technology can effectively deal with the complex geological conditions of water-rich composite roof, and realize the long-term stability control of gob-side entry retaining. The research results can provide a reliable technical basis for non-pillar coal mining under deep and complex geological conditions.

, authors=Lishan Tang, authorsList=Lishan Tang, 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=1321893333073515216, articleId=1321893332561810125, tenantId=1146029695717560320, journalId=1225396423026438145, language=CN, title=深部富水复合顶板沿空留巷支护设计及应力分析, 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=

针对深部富水复合顶板条件下沿空留巷围岩控制难题，开展了支护设计与应力分析研究。通过分析复合顶板结构与富水环境对围岩稳定性的影响机制，指出了传统支护方式在控制持续变形及底板软化方面的局限性。提出了协同控制技术体系：采用长度为11.8 m的恒阻锚索进行三列垂直顶板支护，并结合双向聚能爆破切顶技术以阻断采空区侧向应力传递；在动压区设置“一梁四柱”式液压支架加强支护；在淋水段采用C20混凝土铺底与注浆锚索联合技术控制底板渗水软化。工程应用结果表明：该技术体系将围岩从剧烈变形至趋于稳定的时间缩短了40%以上；回风顺槽左帮最大累计收敛量控制在940 mm以内，底鼓量显著降低至660 mm以内。所提出的协同控制技术能够有效应对富水复合顶板的复杂地质条件，实现了沿空留巷的长期稳定控制。研究结果可为深部复杂地质条件下的无煤柱开采提供可靠的技术依据。

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唐利山（1978—），男，甘肃武威人，工程师，主要研究方向为煤矿安全生产管理。E-mail:820340572@qq.com

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唐利山（1978—），男，甘肃武威人，工程师，主要研究方向为煤矿安全生产管理。E-mail:820340572@qq.com

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