采区大断面硐室围岩稳定性分析及其控制技术研究.pdf

硕士学位论文 采区大断面硐室围岩稳定性分析及其 控制技术研究 Study on the Surrounding Rock Stability Aanlysis and Its Control Technology of Chamber in District with Large Section 作 者 陈 杰 导 师 荆升国 中国矿业大学 二〇一五年五月 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 采区大断面硐室围岩稳定性分析及其 控制技术研究 Study on the Surrounding Rock Stability Aanlysis and Its Control Technology of Chamber in District with Large Section 作 者 陈 杰 申请学位 工学硕士 学科专业 采矿工程 答辩委员会主席曹胜根教授 导 师 荆升国 培养单位 矿业工程学院 研 究 方 向 矿山压力及其控制 评 阅 人 谢 文 兵 汪 长 平 二〇_ 五年五月 万方数据 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 年月 日 导师签名 年月 日 万方数据 论文审阅认定书 研 究 生 陈 杰 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 谢 本论文是在荆升国老师的悉心指导下完成的，从论文的选题、研究方案的确定到 论文的写作， 都得到了恩师全方位的指导和培养， 凝聚着导师的极大心血。 师从三载， 收获颇丰，感触亦深。导师在这三年里无论是在学习上还是在生活中都给我以莫大的 帮助，也是导师的培养和帮助让我去过很多的现场，给我很多尝试、交流和学习的机 会 ，学业上有了进步，做事做人更加成熟。在此，谨向我的导师致以深深的敬意和感 谢 特别感谢谢文兵教授和荆升国老师在我三年研究生期间给予的无私帮助和真诚 关 怀 从手把手指导我的本科毕业设计，甚至是论文的排版到项目方案撰写、从学校 到煤矿生产现场，谢老师和荆老师带着我一步步地尝试。他们严谨求实、深入独到的 治学态度和对科研事业的献身精神也深深感染着我。 感谢娄培杰博士、 王其洲博士在我的学习生活中给予的帮助和支持 感谢李亚运、 郑建彬、谢涛锋、朱琦、宋浬永、张剑、刘晨晨、陈振亚、赵金帅等硕士在我论文写 作期间提供的许多宝贵建议和帮助感谢费小保、繆拥正、钱志良、史永涛、董宇、 王波、陈美林、张德海、王刚、刘凯强、曹明、丁国峰、时吉贺、钟耀华、臧龙、李 鉴、申金帅、安宇、刘家启、范洪飞等已毕业硕士在我读研期间给予的关心和鼓励 感谢在现场研究和学习生活中给我提供大量帮助和宝贵建议的领导和工程技术 人 员 感谢中国矿业大学七年来的培养感谢各位授课老师及矿业工程学院殷实老师、 付丽红老师的无私奉献 真诚感谢为我付出一切的父母没有你们的养育、鼓励和支持，没有你们无私的 理解、爱护和艰辛的付出，我也不可能顺利地完成各项学业。你们的恩情实难言报， 我惟有在今后人生道路上勤奋工作， 以尽孝道 最后，衷心感谢各位专家、教授在百忙之中评阅本论文，并真诚地期望得到更多 的指导和启迪 陈 杰 2015年 5 月 万方数据 万方数据 摘 要 采区大断面硐室是服务整个采区用作专门用途的硐室， 一般与多个巷道硐室密集 布置，力学环境复杂，其永久支护效果直接影响煤矿高效生产。采区皮带机头硐室一 般位于采区运输上下山的端部，是运煤、排矸等重大系统的核心部位。 本 文 以 告 成 煤 矿 2 5 采区皮带机头硐室围岩稳定性分析及其控制技术研宄为背 景 ，首先结合弹性力学模型和基于莫尔库伦准则的数值模型，分析硐室断面半径、宽 高比和相邻硐室位置对大断面硐室围岩力学环境的影响，应用弹性力学半无限体理 论 ，得出了一侧采空煤柱底板岩层应力分布情况；然后，根 据现 场 调查 告 成 煤 矿25 采区皮带机头硐室地质采矿条件及其围岩变形破坏特征， 分析硐室变形破坏的主要影 响因素，并采用数值模拟手段，对比分析硐室自身结构影响、多层巷道空间影响、支 承压力影响三种条件硐室力学响应围岩破裂屈服范围、围岩变形及围岩应力分布情 况 。在上述研宄的基础上，提出了高强二次锚网索支护全断面注浆加固 底板高强 锚网索支护的大断面支护技术，分析了该支护技术的机理，并采用数值模拟手段验证 了该支护技术对复杂条件下大断面硐室围岩控制的有效性；最后，结 合 告 成 煤 矿 25 采区皮带机头硐室地质采矿条件，根据全断面锚网索大断面支护技术核心，确定了硐 室支护技术方案与参数，并进行了工业性试验，取得了良好效果。 该论文有图63幅，表 8 个 ，参 考文 献 99篇 。 关键词采区大断面硐室；数值分析；高强锚网索；底板支护 I 万方数据 Abstract The chamber with large section, which serve for the whole district for special use， generally located in a complex mechanical enviroment for concentrated arrangement with multi roadways and chambers and the effect of permanent support diectly decides effciency product of mining.Conveyor head chamber used to set in terminal of district rise or district dip, which is a significant part of conveyor system. Based on the study on the surrounding rock stability anlysis and its control technology of conveyor head chamber in 25 mining district of Gaocheng coal mine, firstly, elastic model mechanics calculation and numerical simulation on Coulomb Mohrs criterion are used to analyze the influence of the factors on the chambers’ mechanics environment, such as dimension of chamber, aspect ratio and location of adjacent chamber. Semi-infinite elasticity theory is applied to obtain the distribution laws of one side emptied coal pillar abutment pressure in the floor strata. Then, field investigation is applied, the geological and mining conditions of conveyor head chamber in 25 mining district, deation and failure characteristics and its main influencing factors of conveyor head chamber in 25 mining district are obtained. Numerical simulation measure is used to comparatively analyse the change of surrounding rock plastic zone area, surrounding rock deation and maximum principal stress under the influence of conveyor drive head chamber structure, multi roadway around the chamber and tectonic stress field. Next, based on the above studies, the full section support technology with high strength bolt-mesh-anchor and full sectional grouting reinforcement and high strength bolt-mesh-anchor floor support is put forward and the mechanism of support technology is analyzed. The effectiveness of the technology on the surrounding rock control of conveyor head chamber in 25 mining district with large section is verified by numerical simulation.At last, according to the geological and mining conditions of conveyor head chamber in 25 mining district and the mechanism of full section support technology, the support scheme and support parameters are determined, the industrial test is conducted, and the good results ara achieved. The paper includes 63 figures, 8 tables, 99 references. Key words chamber in mining district with large section; numerical simulation; high strength bolt-mesh-anchor; floor support technology II 万方数据 目 录 摘要.................................................................................................................................I 目 录 .............................................................................................................................III 图清单............................................................................................................................VII 表 清 单 ..............................................................................................................................XI 变量注释表.................................................................................................................... X II 1 绪 论 .................................................................................................................................1 1.1研宄背景及意义.........................................................................................................1 1 .2 国内外研宄现状.........................................................................................................2 1.3试验硐室概述.............................................................................................................8 1.4主要研宄内容与方法............................................................................................... 10 2 采区大断面硐室围岩力学分析...................................................................................12 2.1 硐室断面影响 ...........................................................................................................12 2 .2 相邻硐室影响...........................................................................................................17 2.3 侧采空煤柱底板岩层应力分布............................................................................21 2 .4 本章 小 结 ...................................................................................................................24 3 告 成 矿 25采区皮带机头硐室围岩稳定性分析.........................................................25 3 .1 皮带机头硐室变形破坏主要影响因素....................................................................25 3 .2 皮带机头硐室结构稳定性分析................................................................................26 3.3 多巷道空间影响分析 ............................................................................................... 31 3.4 支承压力对硐室围岩稳定性影响分析 ....................................................................35 3 .5 本章小结...................................................................................................................37 4 采区大断面硐室围岩控制技术...................................................................................39 4 .1 注浆加固...................................................................................................................39 4.2 二次锚网索支护.......................................................................................................43 4 .3 底板控制技术...........................................................................................................47 4 .4 全断面联合支护数值模拟分析................................................................................48 4 .5 本章小结...................................................................................................................53 5 现场工业性试验.......................................................................................................... 55 5.1 支护方案设计...........................................................................................................55 III 万方数据 5 .2 施工工艺和支护设备............................................................................................... 60 5 .3 方案实施遇到问题及解决办法................................................................................61 5 .4 支护效果分析...........................................................................................................63 6 结 论 ..............................................................................................................................67 参考文献..........................................................................................................................69 作者简历..........................................................................................................................74 学位论文原创性声明...................................................................................................... 75 学位论文数据集.............................................................................................................. 76 IV 万方数据 G o门t o门t s Abstract............................................................................................................................II Contents............................................................................................................................V L ist of Figures............................................................................................................... VII L ist of Tables................................................................................................................... XI L ist of Variables............................................................................................................ X II 1 Introduction................................................................................................................... 1 1.1 Research Background and Significance........................................................................1 1.2 Research Status at Home and Abroad............................................................................2 1.3 Introduction of Test Chamber...................................................................................... 8 1.4 Main Research Problems and s.......................................................................10 2 Rock Mechanical Analysis of District Chamber with with L arge Section...............12 2.1 Influence of Chamber section..................................................................................... 12 2.2 Influence of Adjacent Chamber.................................................................................. 17 2.3 Distribution L aws of One Side Emptied Coal Pillar Abutment Pressure in the Floor Strata ................................................................................................................................. 21 2.4 Brief Summary ........................................................................................................... 24 3 Analysis of Stability of Conveyor Drive Head Chamber Surrounding Rock in 25 Mining District of Gaocheng Coal M ine.......................................................................25 3.1 Main Influencing Factors of Conveyor Drive Head Chamber Deation and Failure 25 3.2 Analysis of the Stability of Conveyor Drive Head Chamber Structure .......................26 3.3 Analysis of Multi Roadway Influence .........................................................................31 3.4 Analysis of the Effect on the Stability of Chamber Surrounding Rock in Tectonic Stress Field ..................................................................................................................................35 3.5 Brief Summary ...........................................................................................................37 4 Surrounding Rock Control Technology of District Chamber with L arge Section ... 39 4.1 Grouting Reinforcement ............................................................................................. 39 4.2 Second High Strength Bolt-Mesh-Anchor Support Technology .................................43 4.3 Control Technology of Floor Surrounding Rock ......................................................... 47 4.4 Numerical Simulation Analysis of Full Section Support ............................................48 V 万方数据 4.5 Brief Summary ........................................................................................................... 53 5 Field Industrial Test.................................................................................................... 55 5.1 Design of Chamber Support Scheme ..........................................................................55 5.2 Construction Technology and Equipment...................................................................60 5.3 The Solution to the Problems Encountered During the Implementation Scheme........61 5.4 Analysis of the Supporting Effect................................................................................63 6 Conclusions.................................................................................................................. 67 References........................................................................................................................69 Author’s Resume............................................................................................................ 74 Declaration of Thesis Originality...................................................................................75 Thesis Date Collection.................................................................................................... 76 VI 万方数据 图清单 图序号图名称页码 图 1 - 125采区皮带机头硐室与周围巷道位置关系7 Figure 1 - 1 L ocation relationship between conveyor drive head in 25 mining district and surrounding roadways 7 图 1 - 225采区皮带机头硐室岩层柱状7 Figure 1 - 2Geology columnar section around chamber in 25 minning district7 图 1 - 325采区皮带机头硐室剖面图8 Figure 1 - 3Strata geological section around conveyor drive head in 25 mining district8 图 1 - 425采区皮带机头硐室变形破坏特征9 Figure 1 - 4Deation characteristics of conveyor drive head chamber in 25 district9 图 1 - 5研究技术路线10 Figure 1 - 5Research technical route10 图2 - 1围岩结构体分类示意图12 Figure 2 - 1Schematic diagram of surrounding rock structured body classification12 图2-2 围岩体结构与地下工程尺寸的关系示意图 12 Figure 2-2Schematic relationship between rock structure and size of underground works12 图2 - 3简支梁力学模型13 Figure 2 - 3Charpy mechanical model13 图2-4简支梁力学分析13 Figure 2-4Mechanics analysis of charpy13 图2 - 5不同断面数值计算模型14 Figure 2 - 5Numerical calculation models with different sections14 图2-6不同断面硐室围岩最大主应力15 Figure 2-6Maximum principal stress of