王庄矿7105综放面沿空掘巷围岩控制技术研究.pdf

山西省煤基重点科技攻关项目（MJ2014-12）资助 工程硕士专业学位论文 王庄矿 7105 综放面沿空掘巷 围岩控制技术研究 Surrounding rock evolutionary feature and control technology of gob-side entry driving in Wangzhuang mine 7105 working face 作 者陈昭宏 指导教师张益东 教授 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 TD322 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 王庄矿 7105 综放面沿空掘巷 围岩控制技术研究 Surrounding rock evolutionary feature and control technology of gob-side entry driving in Wangzhuang mine 7105 working face 作 者 陈昭宏 导 师 张益东 申请学位 工学硕士 培养单位 矿业工程学院 学科专业 矿业工程 研究方向 围岩应力控制 答辩委员会主席 李桂臣 评 阅 人 盲评 二○一九年五月 万方数据 致谢致谢 随着致谢这一章节的动笔， 我的研究生生活也即将结束。想想以后有些朋友 不再见面，我的心中充满了不舍。 首先，感谢我的导师张益东老师。两年的研究生时光，张老师对我们视如己 出，在我们撰写遇到瓶颈给予我们支持，在我们出现错误时及时给我们纠正，在 我们心生倦怠时给我们鼓气。正是张老师在学业和论文上，给了我最大的支持， 让我得以走完这两年的旅程。在此，郑重的再次感谢张益东老师 其次，感谢季明老师、张凯老师、程敬义老师、高林生老师在研究课题中给 予我的莫大帮助，和在我研究道路上的指引。 再次，感谢我的课题组师兄弟，感谢张猛师兄、张明磊师兄、郭红军师兄、 程亮师兄、刘建师兄、于鹏飞师兄、朱帅师兄、杜心文师兄、王康康师兄、张弦 师兄、曹东亮师兄、周长过师兄，感谢同学李海珠、梁翱翔、张坤、王荟钦，感 谢师弟焦鹏，在我课题组的两年学习生活中给予我的关心和照顾。 感谢王庄煤矿生产中心倪亮主任、采煤科韩月强科长、李兴工程师助理、张 超技术员对我的论文撰写的支持与帮助。 感谢我的班级，我的同学。研究生两年，是你们给我的陪伴和支持，让我在 这两年间得以快乐地度过，在学习的道路上有人相伴。 感谢我的父母，我的家庭。是父母给了我物质上的足够动力，精神上的温柔 乡；纵使我离家千里，也让我觉得他们就在我的身边，默默给我加油鼓劲。你们 对我的信任，将是我最大的动力。 感谢学校和学院六年时间的栽培。 感谢各位老师对本论文的评阅和指导。 陈昭宏 2019 年 5 月 万方数据 I 摘摘 要要 随着煤矿开采深度不断深入， 开采强度不断提升， 井下生产条件也日益困难， 巷道维护困难问题也愈发凸显，成为制约煤矿安全生产、高效生产的问题之一。 7105 综放工作面辅助进风巷作为小煤柱沿空掘巷，是王庄煤矿 71 采区实现高效 生产、连续接替、同时提高工作面采出率的关键性技术，对煤炭资源科学开采， 矿井整体采出率提升，矿井服务期限的提高具有重要意义。 本文针对 7105 工作面沿空掘巷应力环境，采用理论分析、数值模拟和现场 实践的方法对 7105 沿空掘巷围岩控制技术进行了研究，主要如下 （1） 通过理论分析巷道上覆岩层破断结构稳定性， 得到了基本顶破断特征， 确定了三角块具体参数、 巷道掘进后侧向支承压力变化规律以及合理的小煤柱沿 空掘巷煤柱宽度； （2） 通过数值模拟计算， 研究了不同宽度煤柱对巷道围岩应力分布的影响， 得出了不同宽度煤柱下的巷道围岩应力变化规律，最终选择合理煤柱宽度为 8m， 并确定了 8m 煤柱条件下各个阶段巷道围岩应力分布状态，了解了围岩应力演化 过程； （3）以锚固复合承载体为理论基础，确定了 7105 辅助进风巷支护参数，对 支护参数进行了数值模拟验证其合理性，并进行了工业性试验，实践证明所确定 煤柱宽度和巷道支护参数可以有效控制巷道围岩变形， 保证巷道服务期间的使用。 该论文有图 45 幅，表 13 个，参考文献 74 篇。 关键词关键词沿空掘巷；支承压力；数值模拟；锚杆支护。 万方数据 II Abstract With the deepening of coal mining depth, the mining intensity has been continuously improved, the production conditions in underground mines have become increasingly difficult, and the difficulty in maintenance of roadways has become more and more prominent, which has become one of the problems that restrict the safe production and efficient production of coal mines. As a small coal pillar of gob side entry, the 7105 fully mechanized caving face assisted the wind lane is the key technology for achieving high-efficiency production, continuous replacement and increasing the working face recovery rate in the 71 mining area of Wangzhuang Coal Mine. The overall mining output rate of mines has increased, and the improvement of mine service period is of great significance. In this paper, based on the stress environment of the gob side entry along the 7105 working face, the theoretical analysis, numerical simulation and field practice are used to study the surrounding rock control technology of the roadway along the 7105 working face, mainly as follows 1 Through theoretical analysis of the stability of the stratum structure of the overlying strata in the roadway, the basic top breaking characteristics are obtained, and the specific parameters of the triangular block, the lateral supporting pressure change after tunneling and the reasonable coal pillar width are determined. 2 Through the numerical simulation, the influence of different width coal pillars on the stress distribution of surrounding rock of roadway is studied. The variation law of surrounding rock stress of roadway under different width coal pillars is obtained. Finally, the reasonable coal pillar width is selected to be 8m. The stress distribution state of surrounding rock in all stages of roadway under 8 coal pillar conditions, and the evolution process of surrounding rock stress is understood. 3 Based on the theory of composite bolt-rock bearing structure, the support parameters of 7105 auxiliary wind lane are determined. The rationality of the support parameters is verified by numerical simulation, and the industrial test is carried out. The practice proves the width of the coal pillar. And the roadway support parameters can effectively control the deation of the surrounding rock of the roadway and ensure the use during the service of the roadway. The paper has 45 pictures, 13 tables, and 74 references. Key words gob side entry; bearing pressure; numerical simulation; bolt support. 万方数据 III 目目 录录 摘摘 要要 ....................................................................................................................... I 目目 录录 .................................................................................................................... III 图清单图清单 ...................................................................................................................VII 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 选题背景及研究意义 ......................................................................................... 1 1.2 国内外研究现状 ................................................................................................. 2 1.3 研究内容、方法及技术路线 .............................................................................. 6 2 工程概况工程概况 ............................................................................................................... 8 2.1 地质概况............................................................................................................. 8 2.2 生产概况............................................................................................................. 9 2.3 围岩力学性质测定 ............................................................................................. 9 2.4 本章小结........................................................................................................... 12 3 小煤柱应力演化规律及煤柱宽度理论确定小煤柱应力演化规律及煤柱宽度理论确定 ....................................................... 13 3.1 巷道上覆岩层破断结构稳定性分析 ................................................................ 13 3.2 巷道实体煤帮侧向支承压力分布规律 ............................................................ 17 3.3 煤柱宽度理论确定 ........................................................................................... 18 3.4 本章小结........................................................................................................... 20 4 煤柱宽度数值模拟研究煤柱宽度数值模拟研究 ...................................................................................... 21 4.1 数值模拟确定煤柱宽度 ................................................................................... 21 4.2 小煤柱应力扰动演化规律 ................................................................................ 27 4.3 本章小结........................................................................................................... 34 5 锚杆（索）支护设计锚杆（索）支护设计 .......................................................................................... 35 5.1 锚杆支护机理 ................................................................................................... 35 5.2 锚杆参数确定 ................................................................................................... 35 5.3 锚索参数确定 ................................................................................................... 40 5.4 钻孔深度及孔径 ............................................................................................... 42 5.5 支护参数设计 ................................................................................................... 42 5.6 支护效果数值模拟验证 ................................................................................... 45 5.7 本章小结 .......................................................................................................... 51 6 矿压观测矿压观测方案及工业性实验方案及工业性实验 .............................................................................. 53 万方数据 IV 6.1 测站布置及观测内容 ....................................................................................... 53 6.2 沿空巷道段位移观测 ....................................................................................... 54 6.3 非沿空巷道段位移观测 ................................................................................... 55 6.4 本章小结........................................................................................................... 57 7 结论结论 ..................................................................................................................... 58 参考文献参考文献 ................................................................................................................ 60 作者简历作者简历 ................................................................................................................ 64 学位论文原创性声明学位论文原创性声明 ............................................................................................. 65 学位论文数据集学位论文数据集 ..................................................................................................... 66 万方数据 V Contents Abstract .................................................................................................................... I Contents ...................................................................................................................V List of Fingers .......................................................................................................VII List of Table .............................................................................................................X List of Variables .................................................................................................... XI 1 Introduction .......................................................................................................... 1 1.1 The Background and Significance of The study ................................................... 1 1.2 Current Situation of Research at Home and Abroad ............................................. 2 1.3 Research Content, and Technical Route .................................................. 6 2 Engineering Background ..................................................................................... 8 2.1 Geological overview ............................................................................................ 8 2.2 Production overview ............................................................................................ 9 2.3 Determination of mechanical properties of surrounding rock ............................... 9 2.4 Chapter summary .............................................................................................. 12 3 Theoretical analysis of stress evolution law and width determination of small coal pillars .............................................................................................................. 13 3.1 Stability analysis of broken structure of overlying strata in roadway .................. 13 3.2 Distribution law of lateral support pressure of roadway ..................................... 17 3.3 Theoretical determination of coal pillar width .................................................... 18 3.4 Chapter summary .............................................................................................. 20 4 Numerical simulation study ............................................................................... 21 4.1 Determine coal pillar width in numerical simulation .......................................... 21 4.2 Coal column stress disturbance evolution law .................................................... 27 4.3 Chapter summary .............................................................................................. 34 5 anchor cable support design ............................................................................ 35 5.1 Bolt support mechanism .................................................................................... 35 5.2 Anchor parameter determination ........................................................................ 35 5.3 Anchor cable parameter determination ............................................................... 40 5.4 Drilling depth and aperture ................................................................................ 42 5.5 Support parameter design .................................................................................. 42 5.6 Numerical simulation of support effect .............................................................. 45 5.7 Chapter summary .............................................................................................. 51 6 Pressure observation program and industrial experiment ............................... 53 万方数据 VI 6.1 Observatory layout and observation content ....................................................... 53 6.2 Displacement observation of gob-side entry driving........................................... 54 6.3 Displacement observation of protection coal pillar ............................................. 55 6.4 Chapter summary .............................................................................................. 57 7 Conclusion .......................................................................................................... 58 Reference ............................................................................................................... 60 Author’s resume .................................................................................................... 64 Dissertation original statement ............................................................................. 65 Dissertation data set .............................................................................................. 66 万方数据 VII 图清单图清单 图序号 图名称 页码 图 1-1 技术路线 7 Figure 1-1 Technical route 7 图 2-1 7105 工作面巷道布置图 8 Figure 2-1 7105 working face roadway layout 8 图 2-2 7105 工作面顶底板综合柱状图 9 Figure 2-2 Comprehensive histogram of 7105 working face 9 图 2-3 取样地点 10 Figure 2-3 Sampling location 10 图 2-4 煤岩样加工仪器 10 Figure 2-4 Coal rock test block processing equipment 10 图 2-5 煤岩样力学性质测试设备 11 Figure 2-5 Test equipment for mechanical properties of coal and rock 11 图 2-6 基本顶至基本底单轴抗压实验过程 11 Figure 2-6 Compressive strength test experiment process 11 图 2-7 电阻应变仪 12 Figure 2-7 Resistance strain gauge 12 图 2-8 抗拉强