矿用锚索周边剪应力分布规律及新型高强锚索束研发.pdf

硕士学位论文 矿用锚索周边剪应力分布规律矿用锚索周边剪应力分布规律 及新型高强锚索束研发及新型高强锚索束研发 Distribution of Peripheral Shear Stress of Mine Anchor Cable and Research and Development on New High-strength Anchor Cable Bundle 作 者孙 辉 导 师李桂臣 副教授 中国矿业大学 二○一四年五月 长江学者和创新团队发展计划资助（IRT1084 江苏高校优势学科建设工程资助项目SZBF2011-6-B35 中央高校基本科研业务费专项资金资助（2014QNB27） 国家自然科学基金青年科学基金资助项目（50904064 万方数据 中图分类号 TD353 学校代码 10290 UDC 622 密 级 公开 中国矿业大学 硕士学位论文 矿用锚索周边剪应力分布规律矿用锚索周边剪应力分布规律 及新型高强锚索束研发及新型高强锚索束研发 Distribution of Peripheral Shear Stress of Mine Anchor Cable and Research and Development on New High-strength Anchor Cable Bundle 作 者 孙 辉 导 师 李桂臣 副教授 申请学位 工学硕士 培养单位 矿业工程学院 学科专业 采矿工程 研究方向 巷道围岩控制 答辩委员会主席 谢耀社 评 阅 人 阚甲广 黄超 二○一四年五月 万方数据 79 学位论文原创性声明 学位论文原创性声明 Declaration of Thesis Originality 本人郑重声明所呈交的学位论文矿用锚索周边剪应力分布规律及新型高 强锚索束研发 ，是本人在导师指导下，在中国矿业大学攻读学位期间进行的研 究工作所取得的成果。据我所知，除文中已经标明引用的内容外，本论文不包含 任何其他个人或集体已经发表或撰写过的研究成果。 对本文的研究做出贡献的个 人和集体，均已在文中以明确方式标明。本人完全意识到本声明的法律结果由本 人承担。 学位论文作者签名 年 月 日 万方数据 学位论文使用授权声明 学位论文使用授权声明 Certificate of Thesis Authority 本人完全了解中国矿业大学有关保留、使用学位论文的规定，同意本人所撰 写的学位论文的使用授权按照学校的管理规定处理 作为申请学位的条件之一， 学位论文著作权拥有者须授权所在学校拥有学位 论文的部分使用权，即①学校档案馆和图书馆有权保留学位论文的纸质版和电 子版，可以使用影印、缩印或扫描等复制手段保存和汇编学位论文；②为教学和 科研目的，学校档案馆和图书馆可以将公开的学位论文作为资料在档案馆、图书 馆等场所或在校园网上供校内师生阅读、浏览。另外，根据有关法规，同意中国 国家图书馆保存研究生学位论文。 （保密的学位论文在解密后适用本授权书） 。 作者签名 导师签名 年 月 日 年 月 日 万方数据 论文审阅认定书 论文审阅认定书 Thesis Approval Identification 研究生 孙 辉 在规定的学习年限内，按照研究生培养方案的 要求，完成了研究生课程的学习，成绩合格；在我的指导下完成本学 位论文,经审阅，论文中的观点、数据、表述和结构为我所认同，论 文撰写格式符合学校的相关规定， 同意将本论文作为学位申请论文送 专家评审。 导师签字 年 月 日 万方数据 致致 谢谢 论文付梓之际，首先呈上我对恩师李桂臣副教授深深的谢意李老师治学严 谨，学识渊博，待人诚恳，胸襟坦荡，他高尚的人格魅力、忘我的工作精神，将 是学生一生学习的榜样三年来，在导师的言传身教中，我学到了许多做人、做 事、做学问的道理，我会牢记终生，并将永远受益。 本文在写作中，有幸得到张农教授的指导。张农教授博学睿智，英风大略， 胸怀宽广，是我永远学习的楷模。 论文在开题及撰写过程中得到了阚甲广副教授、许兴亮副教授、郑西贵副教 授、 赵一鸣老师、 韩昌良老师、 李宝玉博士、 马振乾博士的宝贵建议和细心指导。 他们渊博的学识， 宽广的胸怀， 同样使我受益匪浅， 在此表示深深的敬意和感谢。 研究生学习和生活中，得到了课题组各位师兄弟的真诚帮助和支持，在此向 张磊、田素川、王朋朋、张明、蒋凯、王彬、刘宁宁、刘聪、蒋作函、卫英豪、 王厚文、刘亚宏等硕士表示深深的谢意 特别感谢淮北矿业集团倪建明教授级高工及芦岭煤矿王新琨总工程师、 技术 科蒋大峰副科长、马峰等人在工程实践中给予的大力支持和帮助 感谢室友刘海泉、刘长郄、曹栩、范永龙以及蒋昊良、丁凌霄硕士在生活和 学习中的无私帮助，宿舍的团结与同学的友谊让我快乐度过研究生生涯，是我一 生中宝贵的财富。 感谢我的家人对我求学的一贯理解与支持，衷心感谢我的母亲，是她含辛茹 苦将我抚养成人，是她省吃俭用将我培养成才，感谢我的哥哥，长久以来对我的 关心与照顾，在此祝他们身体健康，幸福快乐 感谢各位专家、教授在百忙之中评审本论文，由于作者水平有限，文中难免 有不足之处，衷心希望各位专家、教授给予批评指正 孙 辉 2014 年 5 月于徐州 万方数据 I 摘 要 摘 要 在拉拔荷载作用下锚索锚固剂与孔壁围岩间剪应力分布的不均匀性已经得 到普遍认同，但对于其具体分布形式，国内外众多学者尚存在不同观点。同时在 深井复杂条件下，巷道变形破坏严重，普通矿用锚索难以控制围岩的长期稳定， 而具有针对性且支护效果好的新型锚索结构相对较少。 论文采用理论分析、数值计算和工程实践相结合的研究方法，系统划分了深 井复杂条件下矿用锚索锚固失稳类型并分析了其关键影响因素， 揭示了矿用锚索 锚固剂与孔壁围岩间剪应力的分布规律，研发了新型高强锚索束及施工工艺，并 在工程实践中得到了成功应用，取得创新成果如下 （1）通过深入细致的现场工程调研，系统划分了深井复杂条件下矿用锚索 锚固失稳类型，归纳出六种主要破坏模式，并重点分析了锚固剂失效、被锚固岩 体弱化和锚固构件破损等三类关键影响因素。 （2）基于弹性理论，利用 Kelvin 问题、Boussinesq 问题建立了拉拔载荷作 用下自由式锚索、全长粘结式锚索的力学模型，推导了两类锚索锚固剂与孔壁围 岩间剪应力分布的数学解析式。 （3）通过力学理论结合数值计算，综合分析了拉拔载荷作用下锚索锚固剂 与孔壁围岩间剪应力的分布规律。在弹性范围内剪应力分布范围较小，主要分布 在锚固段沿轴向 01.0m，且在 0.100.25m 内迅速增大到极值，之后沿轴向缓缓 减小至趋近 0。 （4）通过理论设计与现场试验，研发了适用于煤矿深井复杂条件的锚索束 结构及施工工艺，并在芦岭煤矿Ⅱ82 运输上山修复工程中得到了成功应用，实 现了围岩变形的稳定控制，为该类条件巷道支护提供了技术支持。 本论文有图 77 幅，表 3 个，参考文献 79 篇。 关键词关键词矿用锚索；锚固失稳；剪应力；分布规律；锚索束 万方数据 III Abstract The uneven distribution of shear stress of anchor cable between anchoring agent and surrounding rock of hole-wall under drawing load has been generally acknowledged, but many domestic and overseas scholars had different viewpoints for the specific distribution of shear stress. At the same time under the complex condition of deep well, deation and destruction of roadway was very severe, long-term stability of surrounding rock was difficultly controlled by normal mine anchor cable, but new structure of targeted anchor cable of good supporting effect was relatively less. By using research s of combination of theoretical analysis, numerical calculation and engineering practice, the anchoring instability type of mine anchor cable under the complex condition of deep well were divided systematically and the key influence factors of instability were analyzed, the distribution of shear stress of mine anchor cable between anchoring agent and surrounding rock of hole-wall was revealed, structure and construction technology of new high-strength anchor cable bundle were researched and developed, and it was successfully used in the engineering practice, innovative achievements were as follows 1 Through detailed field engineering survey and research, the anchoring instability type of mine anchor cable under the complex condition of deep well were divided systematically, six major destructive mode were concluded, and anchoring agent failure, anchoring rock weaken, anchoring component damaged and three key factors were analyzed emphatically. 2 Based on the theory of elasticity, mechanical model of freestyle anchor cable and total length cohesive anchor cable under drawing load were established by using problem Kelvin and Boussinesq, mathematical analytical ula of Shear stress distribution of two types of anchor cable between anchoring agent and surrounding rock of hole wall were deduced. 3 Through the mechanics theory combining with numerical calculation, the distribution of shear stress of mine anchor cable between anchoring agent and the surrounding rock of hole-wall under drawing load was analyzed synthetically. In the elastic range distribution range of shear stress is smaller, it mainly distributed in the anchoring section along the axial within 01.0 m, and increased quickly to extremum within the range of 0.100.25 m, later along the axial reduced to approaching 0. 万方数据 IV 4 Through theoretical design and field test, structure and construction technology of new high-strength anchor cable bundle applied to the complex condition of deep well were researched and developed, and it was successfully used in restoring project of Ⅱ82 transport rise of LuLing coal mine, the deation of roadway surrounding rock was steadily controlled, it provide technical support for the support under the same condition of roadway. The paper has together 77 figures, 3 tables and 79 references. Keywords mine anchor cable； anchoring instability； shear stress； distribution； anchor cable bundle 万方数据 V 目 录目 录 摘摘 要要 ........................................................................................................................... I 目目 录录 .......................................................................................................................... V 图清单图清单 ........................................................................................................................ IX 表清单表清单 ..................................................................................................................... XIV 变量注释表变量注释表 ............................................................................................................... XV 1 绪论绪论 ........................................................................................................................... 1 1.1 选题背景与研究意义............................................................................................. 1 1.2 国内外研究现状..................................................................................................... 2 1.3 存在的主要问题..................................................................................................... 8 1.4 研究内容及研究方法............................................................................................. 9 2 矿用锚索锚固失稳类型及关键影响因素矿用锚索锚固失稳类型及关键影响因素 ............................................................. 11 2.1 拉力集中型锚索概念与矿用锚索分类............................................................... 11 2.2 矿用锚索锚固失稳主要类型............................................................................... 13 2.3 矿用锚索锚固失稳关键影响因素....................................................................... 16 2.4 本章小结............................................................................................................... 23 3 拉拔载荷作用下锚索周边剪应力分布规律拉拔载荷作用下锚索周边剪应力分布规律 ......................................................... 25 3.1 拉拔载荷作用下锚索的力学分析....................................................................... 25 3.2 锚索周边剪应力分布的数值计算....................................................................... 38 3.3 本章小结............................................................................................................... 44 4 矿用新型高强锚索束结构及施工工艺矿用新型高强锚索束结构及施工工艺 ................................................................. 46 4.1 基于剪应力分布规律确定锚固段长度............................................................... 46 4.2 矿用新型高强锚索束结构................................................................................... 51 4.3 矿用新型高强锚索束施工工艺........................................................................... 58 4.4 本章小结............................................................................................................... 61 5 工程实践工程实践 ................................................................................................................. 62 5.1 Ⅱ82 运输上山工程概况...................................................................................... 62 5.2 巷道围岩控制技术及加固方案........................................................................... 63 5.3 巷道围岩加固效果分析....................................................................................... 65 5.4 矿用新型高强锚索束施工技术要求及结构优化............................................... 68 万方数据 VI 5.5 本章小结............................................................................................................... 69 6 主要结论主要结论 ................................................................................................................. 70 6.1 主要结论............................................................................................................... 70 6.2 创新点................................................................................................................... 71 6.3 不足之处............................................................................................................... 71 参考文献参考文献 ..................................................................................................................... 72 作者简历作者简历 ..................................................................................................................... 77 学位论文原创性声明学位论文原创性声明 ................................................................................................. 79 学位论文数据集学位论文数据集 ......................................................................................................... 80 万方数据 VII Contents Abstract ...................................................................................................................... III Contents .................................................................................................................... VII List of Figures ............................................................................................................ IX List of Tables ........................................................................................................... XIV List of Variables........................................................................................................ XV 1 Introduction ............................................................................................................... 1 1.1 Research Background and Significance ................................................................... 1 1.2 Present Research Situation of Home and Abroad .................................................... 2 1.3 Main Problems ......................................................................................................... 8 1.4 Research Contents and Approaches ......................................................................... 9 2 Anchoring Instable Type of Mine Anchor Cable and Key Influencing Factors 11 2.1 Conception of Tension Concentrated Anchor Cable and Classification of Mine Anchor Cable ............................................................................................................... 11 2.2 Anchoring Instable Main Type of Mine Anchor Cable .......................................... 13 2.3 Anchoring Instable Key Influencing Factors of Mine Anchor Cable .................... 16 2.4 Brief Summary ....................................................................................................... 23 3 Distribution of Peripheral Shear Stress of Anchor Cable under Drawing Load . 25 3.1 Mechanical Analysis of Anchor Cable under Drawing Load ................................ 25 3.2 Numerical Computation of Distribution of Peripheral Shear Stress of Anchor Cable ............................................................................................................................ 38 3.3 Brief Summary ....................................................................................................... 44 4 Structure and Construction Technology of New Mine High-strength Anchor Cable Bundle .............................................................................................................. 46 4.1 Confirming Length of Anchoring Section Based on Distribution of Shear Stress 46 4.2 Structure of New Mine High-strength Anchor Cable Bundle ................................ 51 4.3 Construction Technology of New Mine High-strength Anchor Cable Bundle ...... 58 4.4 Brief Summary ....................................................................................................... 61 5 Engineering Practice ............................................................................................... 62 5.1 Engineering Conditions of Ⅱ82 Transport Rise ................................................... 62 万方数据 VIII 5.2 Control and Strengthening Project of Surrounding Rock of Roadway .................. 63 5.3 Analysis of Strengthening Effect of Surrounding Rock of Roadway .................... 65 5.4 Construction Technical Requirements and Structure Optimization of Mine New High-strength Anchor Cable Bundle ............................................................................ 68 5.5 Brief Summary ....................................................................................................... 69 6 Conclusions .............................................................................................................. 70 6.1 Main Conclusions .................................................................................................. 70 6.2 Innovation Points ................................................................................................... 71 6.3 Inadequate .............................................................................................................. 71 References ..........