榆树坡矿综采面过空巷围岩控制研究.pdf

国家自然科学基金项目（51604261） 工程硕士专业学位论文 榆树坡矿综采面过空巷围岩控制研究 Study on Surrounding Rock Control During Fully Mechanized Mining Face Crossing Abandoned Roadway of Yushupo Mine 姓名付鑫 导师陈勇 讲师 中国矿业大学 二〇一九年五月 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TD323学校代码10290 UDC622密级公开 中国矿业大学 工程硕士专业学位论文 榆树坡矿综采面过空巷围岩控制研究 Study on Surrounding Rock Control During Fully Mechanized Mining Face Crossing Abandoned Roadway of Yushupo Mine 作者付鑫导师陈勇 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 答辩委员会主席黄艳利评 阅 人盲评 二○一九年五月 万方数据 致谢致谢 光阴似箭，日月如梭转眼之间，两年的硕士研究生生活即将结束。在中 国矿业大学这两年的学习期间，我不仅学巷道围岩控制、矿山压力等相关方面 的知识和技能，而且更为重要的是学到了现场做工程的相关专业经验。懂得了 很多为人处世的人生哲理，为以后的工作生涯打下了坚实的基础。 从论文开始选题、写作，论文修改，到最终答辩，我的导师陈勇老师给予 了我莫大的关心和帮助，对我提出了很多宝贵的建议。在平时的学习和生活当 中，陈老师对我也照顾有加，在学术研究和工作方面做表率，教给了我们很多 人生的道理。在此，谨向我的导师陈勇老师致以最诚挚的谢意和最大的敬意。 同时，感谢课题组柏建彪教授、王襄禹教授、徐营副教授、闫帅老师在我 研究生学习期间的关心与帮助，感谢对我论文的指导和意见，对我论文写作方 向提出起到了很大的作用。 感谢陈大勇老师提供的国家自然科学基金对于论文科学研究的支持与帮 助。 感谢课题组师兄吴文达博士、孟宁康师兄、胡国栋师兄、刘帅刚、已经毕 业的曹其嘉师兄给我讲解专业方面的相关知识，在我学习数值软件时提供了莫 大的帮助。感谢同门王锴、孙硕、原建强、冯学彤、孙峰、廖鹏、赵天昊、王 瑞、潘泽勇、谭海东、张洋洋、谢鹏杰等同志对我论文写作方面提供的帮助。 在此，感谢在我毕业论文期间给与我在学术上、工作上、生活上支持和鼓 励的所有人。 感谢李洪伟、赵作敏、赵地杰等同门前辈对我现场实践方面给予的巨大帮 助。 感谢父亲、母亲对我的养育之恩，对我学业的支持和理解，感谢兄长对我 生活上提供的帮助和工作上提供的指引。 最后，感谢各位专家和教授在百忙之中抽出时间评审本文，从您们那里一 定可以得到更多的指导和帮助。 付 鑫 2019 年 5 月 25 日 万方数据 I 摘要摘要 本文以榆树坡煤矿 1207 工作面过空巷为工程背景，采用理论分析、数值计 算和现场实践等方法对综采工作面过空巷时的围岩应力演化特征和变形规律进 行了系统的研究。主要结论如下 （1）巷道掘进和工作面回采引起超前支承压力的叠加效应对工作面过空巷 时的煤柱应力分布规律进行了研究。随着空巷煤柱宽度的不断减小，应力演化 过程呈现出“马鞍形” 、 “单驼峰型”和“尖点型”的变化趋势，煤柱应力集中 程度不断增加。工作面前方存在平行空巷时，基本顶有可能会发生超前破断， 如果不对顶板进行控制，极易造成压架及冒顶等安全事故；根据突变理论，分 析了煤柱弹塑性分区演化规律，解释了煤柱宽度不断减小发生突变失稳的原因； 以“砌体梁”理论为基础，建立了空巷基本顶破断立体力学模型，得出了使工 作面安全通过空巷的最低支护阻力为 3.62MPa。 （2）通过 FLAC3D对工作面过空巷时的围岩运移规律、应力演化以及塑性 区变化规律进行了研究，得出了空巷充填体达到最终强度时空巷煤柱宽度应该 大于 10m；然后对不同强度充填体的变形规律进行了分析，确定充填体最终强 度为 4MPa 时已经能够使工作面安全快速通过空巷。 （3）根据现场实际和高水材料力学特性，现场确定了高水材料的水灰比为 41 时，高水材料最终凝固强度能满足要求。采用“分段阻隔充填法”来进行分 段充填，最后根据矿压监测数据和现场实际效果表明，采用的技术方案能够使 工作面快速安全地通过空巷，相比传统方案有着较大的优越性。 本文有图 41 幅，表 7 个，参考文献 85 篇。 关键词关键词空巷；充填体；砌体梁；围岩稳定 万方数据 II Abstract Based on the engineering background of 1207 working face abandoned roadway in Yushupo Coal Mine, this paper systematically studies the stress evolution characteristics and surrounding rock deation and migration law of the fully mechanized working face when crossing the abandoned roadway according to theoretical analysis and numerical calculation. The research is as follows 1 According to the redistribution of stress in roadway excavation and the superposition effect of advanced abutment pressure in face mining, the stress distribution of coal pillar in abandoned roadway is analyzed theoretically. With the decrease of coal pillar, the stress evolution process presents the changing trends of saddle-shaped, single hump-shaped and cusp-shaped. The stress concentration of coal pillar is increasing. There is an empty Lane in front of the work, and the basic roof may break in advance. In this way, it will cause safety accidents such as pressure rack and roof fall. Based on the catastrophe theory, the evolution law of elastic-plastic zoning of coal pillars is analyzed, and the causes of catastrophic instability of coal pillars with decreasing width are explained. Based on the structure of masonry beam, a three-dimensional mechanics model of basic roof breakage of abandoned roadway is established, and the lowest supporting resistance is 3.62 MPa, which can make the working face pass through the abandoned roadway safely by mathematical calculation. 2 Through the numerical simulation software FLAC3D, the law of surrounding rock movement, stress evolution and plastic zone change in the abandoned roadway are simulated and studied. It is concluded that the width of coal pillar should be greater than 10m when the filling body of abandoned roadway reaches the final strength. Then the deation law of filling body with different strength is analyzed, and the final strength of filling body is 4 MPa, which can make the working face pass through the abandoned roadway. 3 According to the actual water temperature in the field, the final solidification strength of high-water material can be greater than 4 MPa when the water-cement ratio of high-water material is 21. Then, through comparative analysis, it is determined that the field filling scheme uses “segmented barrier filling “. Finally, according to the monitoring data of mine pressure and the actual effect of the site, the scheme can make the working face pass through the abandoned roadway quickly and safely. Compared with the traditional scheme, it has great advantages. 万方数据 III There are 41 figures, 7 tables and 85 references in this paper. Key words abandoned roadway; filling body; masonry beam; surrounding rock stability 万方数据 IV 目录目录 摘要.................................................................................................................................I 目录..............................................................................................................................IV 图清单.......................................................................................................................VIII 表清单..........................................................................................................................XI 变量注释表................................................................................................................ XII 1 绪论............................................................................................................................1 1.1 课题研究背景和意义.............................................................................................1 1.2 国内外研究现状.....................................................................................................2 1.3 研究内容和技术路线.............................................................................................6 2 1207 工作面概况........................................................................................................8 2.1 煤层概况.................................................................................................................8 2.2 采煤工艺.................................................................................................................8 2.3 顶板概况.................................................................................................................9 2.4 空巷参数...............................................................................................................10 3 空巷围岩变形机理分析及控制研究......................................................................13 3.1 空巷围岩垂直应力分布规律...............................................................................13 3.2 空巷基本顶超前破断机理...................................................................................16 3.3 空巷煤柱失稳机理...............................................................................................21 3.4 空巷围岩控制机理...............................................................................................24 3.5 本章小结...............................................................................................................28 4 空巷充填支护参数研究..........................................................................................28 4.1 空巷未充填时围岩数值分析...............................................................................29 4.2 空巷充填方案数值模拟分析...............................................................................34 4.3 充填体应变规律分析...........................................................................................42 4.4 本章小结...............................................................................................................43 5 工业性试验..............................................................................................................43 5.1 充填材料的选择以及配比分析...........................................................................44 5.2 空巷充填方案分析和确定...................................................................................47 5.3 工作面调斜方案...................................................................................................50 5.4 支架压力监测.......................................................................................................52 5.5 经济效益分析.......................................................................................................53 5.6 本章小结...............................................................................................................53 6 主要结论..................................................................................................................55 万方数据 V 参考文献......................................................................................................................56 作者简历......................................................................................................................61 学位论文原创性声明..................................................................................................62 学位论文数据集..........................................................................................................63 万方数据 VI Contents Abstract..........................................................................................................................II Contents........................................................................................................................VI List of Figures............................................................................................................VIII List of Tables................................................................................................................XI List of Variables..........................................................................................................XII 1 Introduction.................................................................................................................1 1.1 Background and Significance of Research...............................................................1 1.2 Research Status at Home and Abroad ....................................................................2 1.3 Research Contents and Techniques Routes..............................................................6 2 General Situation of 1207 Face...................................................................................8 2.1 Coal Seam Survey....................................................................................................8 2.2 Mining Technique.....................................................................................................8 2.3 Roof Profile..............................................................................................................9 2.4Abandoned Roadway Parameters...........................................................................10 3 Mechanism Analysis and Control of Surrounding Rock Deation in Abandoned Roadway.......................................................................................................................13 3.1 Vertical Stress Distribution of Surrounding Rock inAbandoned Roadway.......... 13 3.2Advanced Breaking Mechanism of Main Roof ofAbandoned Roadway..............16 3.3 Instability Mechanism of Coal Pillar inAbandoned Roadway..............................21 3.4 Control Mechanism of Surrounding Rock in Abandoned Roadway......................24 3.5 Summary of The Chapte.........................................................................................28 4 Study on Parameters ofAbandoned Roadway Fill -ing Support...............................29 4.1 NumericalAnalysis of Surro -unding Rock Unfilled in Abandoned Roadway..... 29 4.2 Numerical Simulation and Analysis of Roadway Filling Scheme.........................34 4.3Analysis of Strain Law of Filling Body..................................................................42 4.4 Summary of The Chapte.........................................................................................43 5 Industrial Test............................................................................................................44 5.1 Filling Material Selection and RatioAnalysis........................................................44 5.2Analysis and Determination ofAbandoned Filling Scheme.................................. 47 5.3 Workface Inclination Adjustment Scheme.............................................................50 5.4 Support Pressure Monitoring..................................................................................52 5.5 Economic Benefit Analysis....................................................................................53 5.6 Summary of The Chapte.........................................................................................53 万方数据 VII 6 Main Conclusions......................................................................................................55 References....................................................................................................................56 Author Resume.............................................................................................................61 万方数据 VIII 图清单图清单 List of Figures 图序号图名称页码 图 1-1技术路线图7 Figure 1-1Technical Roadmap7 图 2-1空巷平面位置示意图10 Figure 2-1Plane position diagram of 1207 abandoned roadway10 图 2-21207 空巷断面支护方式示意图12 Figure 2-2Diagram of section support mode of 1207 abandoned roadway12 图 3-1支承压力分区13 Figure 3-1Supporting pressure zoning13 图 3-2巷道围岩应力分布14 Figure 3-2Stress distribution of roadway surrounding rock14 图 3-3“马鞍形”煤柱应力分布15 Figure 3-3Stress distribution of saddle-shaped coal pillar15 图 3-4“单驼峰形”煤柱应力分布16 Figure 3-4Stress distribution of “Single Hump“ coal pillar16 图 3-5“尖点型”煤柱应力分布16 Figure 3-5Stress distribution of “cusp“ pillar16 图 3-6莫尔库伦曲线17 Figure 3-6Mohr-Coulomb curve17 图 3-7基本顶断裂示意图18 Figure 3-7Main roof fracture diagram18 图 3-8基本顶断裂力学模型18 Figure 3-8Main roof fracture mechanics model18 图 3-9基本顶断裂位置示意图19 Figure 3-9Main roof fracture location diagram19 图 3-10基本顶破断位置示意图20 Figure 3-10Main roof break position diagram20 图 3-11空巷基本顶超前破断力学示意图21 Figure 3-11Mechanical schematic diagram of advanced breaking of main roof21 图 3-12煤柱体弹塑性分区示意图22 Figure 3-12Diagram of elastic-plastic zoning of coal pillar22 图 3-13空巷基本顶力学模型25 Figure 3-13Mechanics model of main roof of abandoned roadway25 图 3-14块体 B 受力状态25 Figure 3-14Stress state of block B25 图 4-1煤柱应力监测示意图30 Figure 4-1Diagram of stress monitoring of coal pillar30 图 4-2不同宽度煤柱垂直应力分布云图31 Figure 4-2 Nephogram of vertical stress distribution of coal pillars with different widths 31 万方数据 IX 图 4-3不同煤柱宽度塑性区分布云图33 Figure 4-3Cloud diagram of plastic zone distribution of different coal pillar width33 图 4-4空巷围岩变形曲线34 Figure 4-4Surrounding rock deation curve of abandoned roadway34 图 4-5煤柱体变形曲线36 Figure 4-5Deation curve of coal pillar36 图 4-6不同强度充填体 20m 煤柱应力分布情况35 Fig