羊场湾煤矿沿空掘巷围岩稳定性控制技术研究(1).pdf

国家重点研发计划项目（2018YFC0604700） 工程硕士专业学位论文 羊场湾煤矿沿空掘巷围岩稳定性控制技术 研究 Study on Surrounding Rock Stability Control Technique of Roadway Driving along Goaf in Yangchangwan Coal Mine 作 者樊义宁 导 师张吉雄 教授 中国矿业大学 二〇二〇年六月 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 TD325 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 羊场湾煤矿沿空掘巷围岩稳定性控制技术研究 Study on Surrounding Rock Stability Control Technique of Roadway Driving along Goaf in Yangchangwan Coal Mine 作 者 樊义宁 导 师 张吉雄 申请学位 工程硕士专业学位 培养单位 矿业工程学院 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 黄炳香 评 阅 人 盲审 二〇二〇年六月 万方数据 致谢致谢 本论文是在导师张吉雄教授悉心指导下完成的， 从论文的选题到论文的撰写 无不凝聚着导师的心血。 导师以其对研究方向的敏锐把握和对学术前沿的高瞻远 瞩为学生指明了研究思路， 并及时解决了学生在课题研究期间所遇到的迷茫与困 惑。没有导师对学生的点拨、启迪、鞭策与诸多方面的关心，论文不可能顺利完 成。师从数载，收获甚丰，感触亦深。导师刻苦钻研、勇于创新的开拓精神，勤 勤恳恳、一丝不苟的工作态度，诚实开明、乐于助人的做人品质，高屋建瓴把握 全局的能力，给学生树立起潜移默化的典范作用。值此拙作完成之际，谨向我的 导师张吉雄教授致以最崇高的敬意和衷心的感谢 在此， 特意感谢课题组师兄弟在本论文选题直至完成期间给与的指导和帮助 衷心感谢矿业工程学院领导和老师们数年来在学习和生活上给予的关心、 鼓 励和帮助 感谢我的家人及亲朋好友在学习期间给予的理解和支持， 使我能安心的投入 学习和本次论文的写作中。 感谢羊场湾煤矿提供的工业性试验场地， 感谢矿方相关技术人员在现场调研 和应用研究中给予的帮助。 感谢本论文所引用文献的学者前辈。感谢所有帮助和关心我的人 感谢在百忙之中评审、答辩本论文并提出宝贵意见的各位专家教授 万方数据 I 摘摘 要要 我国能源结构特点是富煤、贫油、少气，但随着煤炭资源开采强度的增大， 浅部资源几近枯竭，随着开采深度的增加，受地应力、构造应力及采动影响，深 井巷道围岩稳定性问题也越来越突出。 厚煤层资源储量占我国全资源储量的 45， 目前厚煤层开采多采用综放开采工艺，为提高煤炭采出率，专家学者提出了沿空 掘巷技术，区段煤柱的留设及巷道的支护显得尤为重要。本论文以羊场湾煤矿 120210 综放工作面与 120209 综放工作面间的区段煤柱留设及巷道支护为工程背 景，通过数值模拟、理论计算并结合现场试验的方法，对沿空掘巷区段煤柱合理 宽度确定、沿空掘巷顶板活动规律、沿空掘巷支护技术、沿空掘巷区段煤柱及巷 道支护控制效果等内容进行研究，实现了羊场湾煤矿沿空掘巷围岩稳定性控制， 取得了良好的应用效果。主要研究成果包括 （1） 基于羊场湾煤矿煤层地质条件， 通过理论分析和数值模拟的研究方法， 对不同宽度区段煤柱的应力、应变及塑性区发育规律进行分析，确定煤柱的合理 大小。 （2）在区段煤柱合理宽度确定后，通过数值模拟的研究方法，对沿空掘巷 顶板及两帮的应力、移近量及塑性区发育规律进行分析，为沿空掘巷支护设计提 供理论基础。 （3）在前述理论计算及数值模拟分析的基础上，提出“简式复合锚索桁架 单体锚索锚杆网喷浆” 的联合支护方式， 分析了简式复合锚索桁架的主动支 护机理，详细设计了巷道支护参数。 （4）选取 120210 工作面风巷进行现场工业性试验，通过矿压观测全面了解 支护系统的工作状况，进而验证或修改支护控制系统的设计；在有针对性的布置 测点、规范测量方法、明确测量周期、测量数据统计分析的基础上，验证支护控 制效果。 该论文有图 34 幅，表 7 个，参考文献 87 篇。 关键词关键词沿空掘巷；区段煤柱；支护技术；稳定性 万方数据 II Abstract Coal-rich, oil-poor, and gas-deficient are the characteristics of Chinas energy structure. However, with the increase in the intensity of coal resource extraction, shallow resources are almost depleted. As the mining depth increases, it is affected by geostress, tectonic stress, and mining. The stability of surrounding rock in deep mine roadway is also becoming more and more prominent. Thick coal seam resource reserves account for 45 of Chinas total resource reserves. At present, the mining of thick coal seams mostly adopts the fully mechanized top coal mining technology. In order to improve the coal recovery rate, experts and scholars have proposed the technology of roadway excavation along the gob, the retention of coal pillars and the roadway Support is particularly important. This paper takes the coal pillars and roadway support in the section between the 120210 fully mechanized caving face and the 120209 fully mechanized caving face in Yangchangwan Coal Mine as the engineering background. Through theoretical analysis, numerical simulation and field tests, The determination of the reasonable width of the coal pillars in the section, the roof movement law of the roadway driving along the goaf, the support technology of the roadway driving along the goaf, and the control effects of the coal pillar and roadway support of the roadway driving along the roadway are carried out. The stability control of the surrounding rock of the empty excavation lane has achieved good application results. The main research results include 1 Based on the geological conditions of the coal seam in Yangchangwan Coal mine, through theoretical analysis and numerical simulation, the development rules of stress, strain and plastic zone of coal pillars in different width sections are analyzed to determine the reasonable size of coal pillars. 2 After the reasonable width of the section pillar is determined, the stress, displacement and plastic zone development law of the roof and two sides of goaf driving are analyzed by numerical simulation , which provides a theoretical basis for the support design of goaf driving. 3 Based on the above theoretical calculation and numerical simulation analysis, the combined support mode of “simple composite cable truss single cable bolt net shotcrete“ is proposed, the active support mechanism of simple composite cable truss is analyzed, and the roadway support parameters are designed in detail. 4 Select 120210 working face wind tunnel to carry out field industrial test, comprehensively understand the working condition of the support system through ore 万方数据 III pressure observation, and then verify or modify the design of the support control system. Based on the specific arrangement of measuring points, standard measurement s, clear measurement period and statistical analysis of measurement data, the support control effect is verified. The paper includes 34 Figures, 7 Tables and 87 References. Keywords roadway driving along goaf; section coal pillar; support technology; stability 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........................................................................................................................... X 变量注释表变量注释表 ................................................................................................................ XI 1 绪论绪论............................................................................................................................ 1 1.1 研究背景与意义 ..................................................................................................... 1 1.2 国内外研究现状 ..................................................................................................... 2 1.3 主要研究内容和方法 ............................................................................................. 6 2 羊场湾煤矿及羊场湾煤矿及 120210 工作面风巷概况工作面风巷概况 ................................................................. 8 2.1 羊场湾煤矿概况 ..................................................................................................... 8 2.2 120210 工作面风巷概况 ....................................................................................... 10 2.3 本章小结 ............................................................................................................... 16 3 沿空掘巷区段煤沿空掘巷区段煤柱稳定性研究柱稳定性研究 ............................................................................. 18 3.1 区段煤柱合理宽度理论计算 ............................................................................... 18 3.2 数值模型与方案 ................................................................................................... 20 3.3 采空区侧向支承压力分布规律 ........................................................................... 21 3.4 不同煤柱宽度的应力分布特征 ........................................................................... 21 3.5 不同煤柱宽度下巷道变形特征 ........................................................................... 25 3.6 综放区段煤柱合理宽度确定 ............................................................................... 27 3.7 本章小结 ............................................................................................................... 28 4 沿空掘巷围岩控制技术研究沿空掘巷围岩控制技术研究 ................................................................................. 29 4.1 沿空掘巷上覆岩层应力应变分析 ....................................................................... 29 4.2 巷道支护参数设计 ............................................................................................... 38 4.3 沿空掘巷围岩支护效果数值分析 ....................................................................... 30 4.4 本章小结 ............................................................................................................... 45 5 现场巷道矿压观测现场巷道矿压观测 ................................................................................................. 46 5.1 巷道观测内容 ....................................................................................................... 46 5.2 巷道观测结果分析 ............................................................................................... 47 5.3 本章小结 ............................................................................................................... 51 6 结论与展望结论与展望 ............................................................................................................. 53 万方数据 V 6.1 主要结论 ............................................................................................................... 53 6.2 展望 ....................................................................................................................... 54 参考文献参考文献 ..................................................................................................................... 55 作者简历作者简历 ..................................................................................................................... 61 学位论文原创性声明学位论文原创性声明 ................................................................................................. 62 学位论文数据集学位论文数据集 ......................................................................................................... 63 万方数据 VI Contents Abstract ....................................................................................................................... ⅡⅡ Contents ...................................................................................................................... ⅥⅥ List of Figures ............................................................................................................. ⅧⅧ List of Tables ............................................................................................................... ⅩⅩ List of Variables .......................................................................................................... ⅪⅪ 1 Introduction ............................................................................................................... 1 1.1 Research background and significance .................................................................... 1 1.2 Research status at home and abroad ........................................................................ 2 1.3 Main research contents and technical route ............................................................. 6 2 General situation of Yangchangwan coal mine and 120210 working face air return roadway ............................................................................................................. 8 2.1 General situation of Yangchangwan Coal Mine ...................................................... 8 2.2 General situation of 120210 working face air return roadway .............................. 10 2.3 Chapter summary ................................................................................................... 16 3 Study on the stability of section coal pillar in roadway driving along goaf ....... 18 3.1 Theoretical calculation of reasonable width of section coal pillar ......................... 18 3.2 Numerical model and scheme ................................................................................ 20 3.3 Distribution of lateral support pressure in goaf ..................................................... 21 3.4 Stress distribution characteristics of different coal pillar widths ........................... 21 3.5 Deation characteristics of roadway under different coal pillar widths ........... 25 3.6 Determination of reasonable width of coal pillar in fully mechanized caving section ...................................................................................................................................... 27 3.7 Chapter summary ................................................................................................... 28 4 Study on surrounding rock control technique in roadway driving along goaf . 29 4.1 Stress-strain analysis of overburden rock strata along goaf ................................... 29 4.2 Numerical analysis of supporting effect of surrounding rock in excavation along the roadway ........................................................................................................................ 30 4.3 Design of Roadway Support Parameters ............................................................... 38 4.4 Chapter summary ................................................................................................... 45 5 Observation of mine ground pressure in roadway on site ................................... 46 万方数据 VII 5.1 Roadway observation contents .............................................................................. 46 5.2 Analysis of roadway observation results ................................................................ 47 5.3 Chapter summary ................................................................................................... 51 6 Conclusions and prospects ..................................................................................... 53 6.1 Main conclusions ................................................................................................... 53 6.2 Prospects ................................................................................................................ 54 References ................................................................................................................... 55 Author’s Resume ........................................................................................................ 61 Declaration of Thesis Originality.............................................................................. 62 Thesis/Dissertation Data Collection ......................................................................... 63 万方数据 VIII 图清单图清单 图序号 图名称 页码 图 1-1 厚煤层沿空巷道上覆岩层结构 4 Figure 1-1 Overlying rock ation structure along goaf in thick coal seam 4 图 1-2 研究技术路线 7 Figure 1-2 Research Technology Route 7 图 2-1 羊场湾煤矿交通位置图 8 Figure 2-1 Traffic map of Yangchangwan Coal Mine 8 图 2-2 120210 工作面位置示意图 10 Figure 2-2 Position of 120210 working surface 10 图 2-3 120210 工作面煤层综合柱状图 12 Figure 2-3 Comprehensive histogram of 120210 working face coal seam 12 图 2-4 120210 区段回风平巷原有支护方案 15 Figure 2-4 Original support scheme of return air lane