复合顶板煤巷围岩多次动压扰动失稳规律及控制.pdf

硕士学位论文 复合顶板煤巷围岩多次动压扰动 失稳规律及控制 Instability Law and Control of Surrounding Rock in Compound Roof Coal Roadway under Multiple Dynamic Pressure Disturbances 作 者王朋 导 师张农 教授 中国矿业大学 二○一九年五月 国家重点研发计划（2017YFC0603001） 国家自然科学基金面上项目（51674244） 万方数据 学位论文使用授权声明学位论文使用授权声明 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 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 复合顶板煤巷围岩多次动压扰动 失稳规律及控制 Instability Law and Control of Surrounding Rock in Compound Roof Coal Roadway under Multiple Dynamic Pressure Disturbances 作 者 王朋 导 师 张农 申请学位 硕士学位 培养单位 矿业工程学院 学科专业 采矿工程 研究方向 岩石力学与岩层控制 答辩委员会主席 高明仕 评 阅 人 盲审 二○一九年五月 万方数据 致谢致谢 岁月如歌，光阴似箭，三年硕士研究生生涯即将结束，回首往昔，奋斗与辛 劳成为丝丝的记忆，快乐与欢笑也都尘埃落定。中国矿业大学以其优良的学习风 气、严谨的科研氛围教我求学；以其博大包容的情怀胸襟、浪漫充实的校园生活 育我成人。值此毕业论文完成之际，我谨向所有关心、爱护、帮助我的人们表示 最诚挚的感谢和最美好的祝愿。 本论文的撰写是在导师张农教授的悉心指导下完成的，三年来，张老师渊博 的专业知识，严谨的治学态度，精益求精的工作作风，诲人不倦的高尚师德，朴 实无华、平易近人的人格魅力对我影响深远，在此对张老师表示深深的感谢。同 时感谢阚甲广老师在项目参与、试验完成以及论文写作中的悉心指导，感谢李桂 臣老师、 郑西贵老师、 许兴亮老师、 赵一鸣老师、 韩昌良老师对我的指点与帮助， 从老师们身上不仅学习到专业的知识与态度，也学习到了生活上的宝贵经验。 试验及论文撰写过程中承蒙多位师兄弟关照， 感谢魏群博士在设计制样模具 时的指点帮助；感谢谢正正博士、项哲博士、王顺硕士、姚文浩硕士、杨海龙硕 士、 曹启龙硕士在制样及大尺度三向五面试验中不辞辛苦的帮助； 感谢杨森博士、 梁东旭博士、 曹俊才博士、 安衍培博士、 伍业伟硕士、 张成浩硕士、 李新跃硕士、 耿行硕士、贾飞硕士、朱登兴硕士在生活和学习上的各种帮助。 感谢屯兰煤矿的领导、 工程技术人员及现场施工人员在实践中给予我的大力 支持和积极配合；感谢三向五面试验机厂家李恒工程师的多次帮助。 最后要感谢的是我的家人，我的爸妈、爷爷奶奶以及姐姐们，感谢爸妈在我 近二十年求学路上的默默支持，支持我的所有选择，包容我的任性、过错，倾尽 所有给我更好的生活，感谢爷爷奶奶和姐姐们的陪伴、关心和爱护，让我觉得自 己永远有着坚实的后盾，能够更加勇敢的向前走。 感谢所有批评过、帮助过、关心过和支持我的人 最后，衷心感谢评阅论文和出席论文答辩的各位教授、专家，感谢您们在百 忙之中给予的指导。 人生路远，这是结束也是开始，在接下来的人生道路中继续奋斗，希望自己 成为一个有毅力、有坚持、有放弃、有趣味的人。 王朋 2019 年 4 月于徐州 万方数据 I 摘摘 要要 煤层形成年代决定了煤巷复合顶板存在的普遍性， 复合顶板结构的不稳定大 大提升了支护难度， 尤其是动压扰动下的复合顶板煤巷支护更是困扰煤矿安全高 效生产的难题。 本文以多次动压扰动下复合顶板煤巷为研究对象， 采用理论分析、 实验室实验及数值模拟相结合的方法对锚固结构及围岩失稳规律进行系统深入 的研究，取得以下主要成果 （1）实验确定了典型复合顶板煤巷 22301 工作面瓦斯治理巷围岩力学基本 性质；试验了铁晶砂胶结新型相似模拟材料，并应用于采矿领域复合顶板煤巷物 理模型制作；分析确定了复合顶板、动压扰动以及支护结构体系不合理为该巷道 围岩稳定性主要影响因素。 （2）基于复合顶板力学模型受力分析了其破坏机理，采用 FLAC3D数值模 拟软件得出了软弱岩层位置、 软弱岩层厚度以及不同侧压系数等影响因素下巷道 围岩变形特征复合顶板煤巷易出现大变形及离层现象；巷道顶板挠度及塑性区 范围与软弱岩层距巷道距离成负相关，与软弱岩层厚度成正相关；随着侧压系数 增大围岩塑性区呈先减小后增大趋势。 （3）通过数值模拟仿真分析得出了 22301 工作面瓦斯治理巷三次采动影响 阶段锚固结构及围岩稳定性变化规律随着动压影响加剧，巷道受高地应力、侧 向支承压力及超前支承压力叠加影响，围岩变形量、塑性区范围以及锚固结构受 力不断增大，原有支护结构无法维持巷道围岩稳定。 （4）优化确定了 22301 工作面瓦斯治理巷采取“高强锚杆钢带强力锚索 金属网”联合支护方案；模拟分析对比了新旧支护方案控制下围岩稳定性，并 应用于现场工业性试验， 矿压监测结果表明优化后巷道围岩变形量得到了有效的 控制。 （5）采用了 YGS127A煤矿巷道围岩光纤光栅动态监测系统，对锚杆受力 进行监测，结果表明优化后整体支护结构受力较为均匀，支护承载体性能得到了 更好的发挥，保证了围岩-支护承载结构的稳定性，证明该支护结构能有效控制 22301 工作面瓦斯治理巷围岩变形，为同类巷道围岩控制提供相关参考。 该论文有图 110 幅，表 11 个，参考文献 83 篇。 关键词关键词复合顶板；煤巷；动压扰动；围岩控制；光纤光栅 万方数据 II Abstract Abstract The age of coal seam ation determines the universality of compound roof in coal roadway, the instability of its structure greatly increases the difficulty of support, especially the support of compound roof coal roadway under dynamic pressure disturbance is a difficult problem that puzzles the safe and efficient production of coal mine. This paper takes compound roof coal roadway under multiple dynamic pressure disturbance as the research object, a systematic and in-depth study on anchorage structure and surrounding rock instability is carried out by combining theoretical analysis, laboratory experiments and numerical simulation. The following main results have been achieved （1）The basic mechanical properties of surrounding rock of gas control roadway in 22301 working face of typical compound roof coal roadway are determined by experiments. A new type of similar simulation material for cementing iron-crystalline sand was tested, It is applied to the physical model making of compound roof coal roadway in mining field for the first time. The main factors affecting the stability of surrounding rock of this roadway are compound roof, dynamic pressure disturbance and unreasonable supporting structure system. （2）The failure mechanism of compound roof is obtained by force analysis based on mechanical model of compound roof, by using FLAC3D numerical simulation software, the deation characteristics of surrounding rock of roadway under the influence factors of position, thickness and lateral pressure coefficient of soft rock stratum are obtained coal roadway with compound roof prone to large deation and separation phenomenon, the deflection of roadway roof and the range of plastic zone are positively correlated with the location and thickness of weak strata, With the increase of lateral pressure coefficient, the plastic zone of surrounding rock decreases first and then increases. （ 3 ） Through numerical simulation analysis, the anchorage structure and surrounding rock stability of gas control roadway in 22301 working face during the third mining stage are obtained as the effect of dynamic pressure increases, The roadway is affected by the superposition of high in-situ stress, lateral abutment pressure and advanced abutment pressure, the deation of surrounding rock, the range of plastic zone and the stress of anchorage structure increase continuously, the original supporting structure can not maintain the stability of surrounding rock of roadway. 万方数据 III （4） Optimized and determined the “high-strength bolt steel belt strong anchor cable metal mesh“ combined support scheme for gas control roadway of 22301 working face. The stability of surrounding rock under the control of new and old support schemes is compared by simulation analysis, it is applied to field industrial test, The results of rock pressure monitoring show that the deation of surrounding rock of roadway is effectively controlled after optimization. （5）Based on the principle of fiber Bragg grating, a dynamic monitoring system of YGS127 A coal mine roadway surrounding rock with fiber bragg grating is developed to monitoring the force of bolt, monitoring results show that the stress of integral support structure is more uni, the perance of support bearing body has been better developed to ensure the stability of surrounding rock-support bearing structure, which proves that the support structure can effectively control the deation of surrounding rock in gas control roadway of 22301 working face. The paper has 110 figures,11 tables and 83 references. Key wordsCompound roof ;Coal roadway; Dynamic pressure disturbances; Surrounding rock control; Fiber bragg grating 万方数据 IV 目目 录录 摘摘 要要 ........................................................................................................................... I 目目 录录 ........................................................................................................................ IV 图清单图清单 ..................................................................................................................... VIII 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 研究背景及意义..................................................................................................... 1 1.2 国内外研究现状..................................................................................................... 2 1.3 主要研究内容与技术路线..................................................................................... 7 2 典型复合顶板煤巷围岩性质测定及稳定性分析典型复合顶板煤巷围岩性质测定及稳定性分析 ................................................... 9 2.1 工程概况................................................................................................................. 9 2.2 22301 工作面瓦斯治理巷围岩力学性能测试..................................................... 11 2.3 基于新型相似模拟材料铺设复合顶板煤巷模型............................................... 14 2.4 22301 工作面瓦斯治理巷围岩稳定性分析......................................................... 20 2.5 本章小结............................................................................................................... 23 3 煤巷复合顶板受力特征及失稳破坏影响因素分析煤巷复合顶板受力特征及失稳破坏影响因素分析 ............................................. 24 3.1 煤巷复合顶板动压作用下受力分析................................................................... 24 3.2 煤巷复合顶板失稳影响因素分析....................................................................... 29 3.3 本章小结............................................................................................................... 35 4 动压扰动复合顶板煤巷围岩及锚固结构稳定性分析动压扰动复合顶板煤巷围岩及锚固结构稳定性分析 ......................................... 37 4.1 数值分析模型的建立........................................................................................... 37 4.2 掘进期间巷道围岩稳定性分析........................................................................... 38 4.3 22301 工作面回采影响下巷道围岩稳定性分析................................................. 43 4.4 下区段工作面回采影响下巷道围岩稳定性分析............................................... 48 4.5 本章小结............................................................................................................... 51 5 工业性试验工业性试验 ............................................................................................................. 53 5.1 支护方案参数设计............................................................................................... 53 5.2 支护效果对比....................................................................................................... 57 5.3 矿压观测与分析................................................................................................... 61 5.4 本章小结............................................................................................................... 71 万方数据 V 6 主要结论主要结论 ................................................................................................................. 73 参考文献参考文献 ..................................................................................................................... 75 作者简历作者简历 ..................................................................................................................... 80 学位论文原创性声明学位论文原创性声明 ................................................................................................. 81 学位论文数据集学位论文数据集 ......................................................................................................... 82 万方数据 VI Contents Abstract ........................................................................................................................ II Contents ..................................................................................................................... VI List of Figures ......................................................................................................... VIII List of Tables ........................................................................................................... XIV List of Variables........................................................................................................ XV 1 Introduction ............................................................................................................... 1 1.1 The Background and Significance of the Study ...................................................... 1 1.2 Research Status at Home and Abroad ...................................................................... 2 1.3 The main research contents and technical route ...................................................... 7 2 Determination of Surrounding Rock Properties and Stability Analysis of Typical Compound Roof Coal Roadway ................................................................................. 9 2.1 Project Overview ..................................................................................................... 9 2.2 Mechanical Properties Test of Surrounding Rock of Gas Control Roadway in 22301 Working Face ............................................................................................................... 11 2.3 Model of Compound Roof Coal Roadway Laying Based on New Similar Simulated Materials ...................................................................................................................... 14 2.4 Stability Analysis of Surrounding Rock of Gas Control Roadway in 22301Working Face .............................................................................................................................. 20 2.5 Chapter Summary .................................................................................................. 23 3 Stress Characteristics of Compound Roof in Coal Roadway and Analysis of Influencing Factors of 1Instability and Failure ...................................................... 24 3.1 Stress Characteristics of Dynamic Roof Coal Roadway with Compound Roof .... 24 3.2 Analysis of Influencing Factors of Compound Roof Instability in Coal Roadway29 3.3 Chapter Summary .................................................................................................. 35 4 Stability Analysis of Surrounding Rock and Anchoring Structure Coal Roadway with Compound Roof under Dynamic Pressure Disturbance................................ 37 4.1 Establishment of Numerical Analysis Model ........................................................ 37 4.2 Stability Analysis of Roadway Surrounding Rock during Driving ....................... 38 4.3 Stability Analysis of Surrounding Rock of Roadway under the Effect of Mining in 22301 Working Face .................................................................................................... 43 4.4 Stability Analysis of Surrounding Rock of Roadway Affected by Mining in Next Section Face ................................................................................................................. 48 4.5 Chapter Summary .................................................................................................. 51 万方数据 VII 5 Industrial Test.......................................................................................................... 53 5.1 Design of Support Scheme Parameter ................................................................... 53 5.2 Contrast of Supporting Effect ................................................................................ 57 5.3 Mine Pressure Observation and Analysis .............................................................. 61 5.4 Chapter Summary .................................................................................................. 71 6 Main Conclusions ............................................................................................