发耳煤矿多煤层重复采动大巷底鼓破坏特征及其控制研究.pdf

工程硕士专业学位论文 发耳煤矿多煤层重复采动大巷底鼓破坏特 征及其控制研究 Research on Failure Characteristics and Control of Floor Heave in Multiple-seam Repeated Mining of Faer Coal Mine 作 者王星瑶 导 师曹胜根 教授 中国矿业大学 二○二○年五月 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 工程硕士专业学位论文 发耳煤矿多煤层重复采动大巷底鼓破坏特征及其 控制研究 Research on Failure Characteristics and Control of Floor Heave in Multiple-seam Repeated Mining of Faer Coal Mine 作 者 王星瑶 导 师 曹胜根 申请学位 工程硕士专业学位 培养单位 矿业学院 学科专业 矿业工程 研究方向 岩体力学与岩层控制 答辩委员会主席 曹安业 评 阅 人 盲评 二○二○年五月 万方数据 致致 谢谢 研究生的学习时光如白驹过隙，转眼之间我将要离开校园步入社会。在研究 生的生涯中，我学到了很多，在老师、师兄以及同学的帮助与陪伴下，我得以顺 利完成硕士阶段学业。 在这里，首先感谢我的导师曹胜根教授，无论是在生活方面还是学习方面都 给予了我无微不至的关心，论文中的每一项工作、每一步进展，无不凝聚着导师 的智慧和心血。导师追求真理的执着信念、精益求精的工作作风、严谨求实的治 学态度和崇高质朴的品德风范，是我终身学习的榜样和楷模，将永远激励我在今 后的人生道路上不断进取，两年的研究生生涯转眼间结束，师恩难忘，惟愿我的 老师永远健康、永远快乐 特别感谢矿业工程学院姚强岭教授在论文的构思、 写作以及完善过程中给予 的悉心指导，姚老师严谨的治学态度、豁达开朗的性格和高尚的人格魅力将使我 终身受益。 感谢课题组张云师兄、赵长政博士师兄在我论文选题、论证方式以及写作方 面给予的指导与帮助；感谢都书禹硕士、李江硕士、宋宇珠硕士，在我论文撰写 过程中需要帮助时，总是毫不迟疑的伸出援助之手；感谢课题组已毕业的万通师 兄、王纪军师兄在学习和生活中给予的帮助；匆匆岁月，即将离别，愿你们越来 越好，愿我们师门越来越强大。 感谢所有指导过我的老师、师兄和同学，你们增加了我的知识储备，使我在 论文写作过程中受到了很大的启发；感谢发耳煤矿申海龙副总、周杰副科长、朱 油雷副科长以及瞿邦位副科长在现场实践方面给予了我莫大的支持。 感谢我的家人，你们默默无闻的支持和理解给予了我无穷的精神动力。 本文在撰写过程中参考了许多专家学者的著作和文献， 他们卓越的研究成果 给我极大的启发和帮助，在此向参考文献的作者表示由衷的感谢。 最后衷心地感谢在百忙之中评阅论文和参加答辩的各位专家、教授 王星瑶 二〇二〇年五月 万方数据 I 摘摘 要要 煤层群联合开采时， 因受煤层重复采动影响导致集中大巷呈现持续流变特征， 不得不多次返修以满足矿井安全生产需要。因此，系统分析多煤层重复采动情况 下集中大巷底鼓变形破坏机理， 对于多煤层联合开采集中巷道底鼓控制技术具有 一定的理论指导与工程实践意义。 本文以发耳煤矿集中轨道大巷底鼓破坏段为工 程背景,实测了巷道底板变形破坏特征,研究了多煤层联合开采覆岩结构复合破 断机理,提出了多煤层重复采动大巷底鼓控制技术,取得了如下研究成果 （1）实测了集中轨道大巷底鼓破坏特征，分析了底鼓变形的因素；建立了 多煤层联合开采重复采动影响下覆岩复合破断模型， 揭示了多煤层重复开采煤柱 一侧力学传递及煤柱下方巷道底板变形破坏机理。 （2）数值计算研究了多煤层重复采动影响下覆岩结构复合破断特征及其运 移规律，掌握了集中轨道大巷围岩应力分布及其底鼓的时空演化规律，研究发现 1 煤、5-3 煤开采对巷道底板的稳定性影响较小，而 3 煤、5-2 煤以及 7 煤开采时 集中轨道大巷呈现持续流变特征。 （3）根据以上研究成果，提出了集中轨道大巷围岩底鼓分阶段控制方案， 并采用数值计算方法研究了巷道围岩应力分布及其变形破坏特征， 并结合现场施 工及其生产需要，提出了集中轨道大巷底鼓控制的优化方案和合理参数。 工业性试验表明，在巷道北侧开挖卸压槽深度为 2m，宽度为 0.8m，南侧开 挖卸压槽深度为 2.5m，宽度为 1.0m，并进行矸石回填，配合巷道围岩注浆和打 底角锚杆支护的情况下，巷道底鼓得到了有效控制。 本论文有图 80 幅，表 7 个，参考文献 89 篇。 关键词关键词多煤层重复采动；煤柱；覆岩垮落结构；应力时空演化；大巷底鼓控 制 万方数据 II Abstract In the joint mining of coal seam group, because of the influence of repeated mining of coal seam, the centralized roadway presents the characteristics of continuous rheology, so it has to be repaired many times to meet the needs of mine safety production. Therefore, the systematic analysis of the deation and failure mechanism of the floor heave of the centralized roadway under the condition of multiple coal seam repeated mining has certain theoretical guidance and engineering practice significance for the floor heave control technology of the centralized roadway under the combined mining of multiple coal seams. In this paper, based on the engineering background of the failure section of the floor heave of the centralized track roadway in the faer coal mine, the deation and failure characteristics of the roadway floor are measured, the composite failure mechanism of the overburden structure of the multi seam combined mining is studied, and the control technology of the floor heave of the multi seam repeated mining roadway is proposed, and the following research results are obtained 1 In this paper, the characteristics of the floor heave of the centralized track roadway are measured, and the factors of the floor heave deation are analyzed. The composite failure model of the overburden under the influence of the repeated mining of multiple coal seams is established, which reveals the mechanical transfer of one side of the repeated mining coal pillars and the deation and failure mechanism of the roadway floor under the pillars. 2 The composite fracture characteristics and migration law of overlying rock structure under the influence of repeated mining in multi-coal seam are studied by numerical calculation, and the stress distribution of surrounding rock of concentrated track roadway and the temporal and spatial evolution of bottom heave are grasped. It is found that 1 coal and 5-3 coal mining have little effect on the stability of roadway floor, while 3 coal, 5-2 coal and 7 coal mining show continuous Rheological characteristics. 3 According to the above research results, the control scheme of surrounding rock floor heave in different stages is put forward, and the stress distribution of surrounding rock is studied by numerical . Combined with field construction and production requirements, the optimization scheme and reasonable parameters of floor heave control for centralized track roadway are proposed. 4 The industrial test shows that the tunnel floor heave is effectively controlled under the conditions of excavation of pressure relief groove at the north side of the 万方数据 III tunnel with a depth of 2m and a width of 0.8m, excavation of pressure relief groove at the south side with a depth of 2.5m and a width of 1.0m, backfilling of gangue, grouting of surrounding rock of the tunnel and anchor support at the bottom angle. This thesis includes 80 Pictures, 7 Tables, and 89 References. Keywords Multiple seam repeated mining; coal pillar; overburden caving structure; spatiotemporal evolution of stress; control of roadway floor heave 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 课题研究背景及意义 ............................................................................................ 1 1.2 国内外研究现状 .................................................................................................... 2 1.3 主要研究内容、方法和技术路线 ........................................................................ 7 2 多煤层重复采动集中大巷底鼓破坏机理多煤层重复采动集中大巷底鼓破坏机理 ............................................................... 9 2.1 工程背景 ................................................................................................................ 9 2.2 巷道底鼓破坏主控因素 ...................................................................................... 15 2.3 多煤层重复开采巷道底板力学特性 .................................................................. 16 2.4 本章小结 .............................................................................................................. 27 3 多煤层重复开采覆岩结构运移特征多煤层重复开采覆岩结构运移特征 ..................................................................... 29 3.1 多煤层开采覆岩垮落结构与运移特征 .............................................................. 29 3.2 重复开采巷道底板应力演化规律 ...................................................................... 40 3.3 重复开采巷道底板破坏特征 .............................................................................. 47 3.4 本章小结 .............................................................................................................. 49 4 多煤层重复开采集中大巷底鼓控制技术多煤层重复开采集中大巷底鼓控制技术 ............................................................. 51 4.1 巷道底鼓控制技术途径 ...................................................................................... 51 4.2 底鼓控制技术方案 .............................................................................................. 52 4.3 底鼓控制效果分析 .............................................................................................. 74 4.4 本章小结 .............................................................................................................. 76 5 现场工业性试验现场工业性试验 ..................................................................................................... 77 5.1 试验方案 .............................................................................................................. 77 5.2 矿压显现特征 ...................................................................................................... 79 5.3 本章小结 .............................................................................................................. 81 6 结论与展望结论与展望 ............................................................................................................. 82 6.1 结论 ...................................................................................................................... 82 万方数据 V 6.2 展望 ...................................................................................................................... 83 参考文献参考文献 ...................................................................................................................... 84 作者简历作者简历 ...................................................................................................................... 90 学位论文原创性声明学位论文原创性声明 ................................................................................................. 91 学位论文数据集学位论文数据集 ......................................................................................................... 92 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 Research Background and Significance .................................................................. 1 1.2 Overseas and Domestic Research Status ................................................................. 2 1.3 Main Research Content, s and Technical Routes ........................................ 7 2 Failure Mechanism of Floor Heave in Concentrated Roadway in Multiple-seam Repeated Mining .......................................................................................................... 9 2.1 Engineering Background ......................................................................................... 9 2.2 Main Controlling Factors of Roadway Floor Heave Failure ................................. 15 2.3 Mechanical Characteristics of Roadway Floor in Multiple Seam Repeated Mining ..................................................................................................................................... 16 2.4 Summary of This Chapter ...................................................................................... 27 3 Migration Characteristics of Overburden Structure in Multiple-seam Repeated mining .......................................................................................................................... 29 3.1 Collapse Structure and Migration Characteristics of Overlying Rock in Multiple- Seam Mining ................................................................................................................ 29 3.2 Stress Evolution Law of Roadway Floor in Repeated Mining .............................. 40 3.3 Failure Characteristics of Roadway Floor in Repeated Mining ............................ 47 3.4 Summary of This Chapter ...................................................................................... 49 4 Research on Control Technology of Roadway Floor Heave in Multiple-seam Repeated Mining ........................................................................................................ 51 4.1 Technical Approach of Roadway Floor Heave Control ......................................... 51 4.2 Technical Scheme of Floor Heave Control ............................................................ 52 4.3 Analysis of Control Effect of Floor Heave ............................................................ 74 4.4 Summary of This Chapter ...................................................................................... 76 5 Field Industrial Test ............................................................................................... 77 5.1 Test Scheme ........................................................................................................... 77 万方数据 VII 5.2 Characteristics of Mine Pressure Appearance ....................................................... 79 5.3 Summary of This Chapter ...................................................................................... 81 6 Conclusion and Prospect ........................................................................................ 82 6.1 Conclusion ............................................................................................................. 82 6.2 Prospects ................................................................................................................ 83 References ................................................................................................................... 84 Author’s Resume ........................................................................................................ 90 Declaration of Thesis Originality .............................................................................. 91 Thesis Data Collection ............................................................................................... 92 万方数据 VIII 图清单图清单 图序号 图名称 页码 图 1-1 技术路线图 8 Figure 1-1 Technology roadmap 8 图 2-1 巷道与煤层间层位关系图 9 Figure 2-1 Figure 2-1 Diagram of the horizon between the roadway and the coal seam 9 图 2-2 轨道大巷顶底板岩性特征 10 Figure 2-2 Lithologic characteristics of roof and floor of track roadway 10 图 2-3 巷道全断面支护图 11 Figure 2-3 Roadway full section support diagram 11 图 2-4 D8 ADVANCE 型 X 射线衍射仪以及射线衍射试样 12 Figure 2-4 D8 ADVANCE X-ray diffractometer and X-ray diffraction sample 12 图 2-5 试样 X 射线衍射图谱 13 Figure 2-5 X-ray dif