黄陵二号井2号辅运大巷围岩破坏机理及加固技术研究.pdf

硕士学位论文 黄陵二号井 2 号辅运大巷围岩破坏机理及加 固技术研究 Study on Failure Mechanism and Reinforcement Technology of Surrounding Rock in No.2 Auxiliary Roadway of Huangling No.2 Coal 作 者刘士杰 导 师高明仕 教授 中国矿业大学 二〇一七年四月 国家自然科学基金资助项目（51564004） 江苏省“青蓝工程”资助项目（JSQL20140207） 江苏省优势学科建设平台资助项目 （SZBF2011-6-B35） 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 黄陵二号井 2 号辅运大巷围岩破坏机理及加固 技术研究 Study on Failure Mechanism and Reinforcement Technology of Surrounding Rock in No.2 Auxiliary Roadway of Huangling No.2 Coal 作 者 刘士杰 导 师 高明仕 申请学位 工学硕士 培养单位 矿业工程学院 学科专业 采矿工程 研究方向 矿山压力及岩层控制 答辩委员会主席 评 阅 人 二○一七年四月 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 致谢致谢 本论文是在高明仕教授悉心指导下完成的，从论文的选题到开题报告，从提 纲的列举到论文中的具体问题，甚至小到论文中的格式，导师都给予了详细的指 导，论文能够如期顺利的完成，离不开导师无私的教诲。三年来，导师渊博的专 业知识，严谨的治学态度，精益求精的工作作风，诲人不倦的高尚师德，朴实无 华、平易近人的人格魅力对我影响深远。导师不仅授我以文，而且教我做人。他 作为老师，点拨迷津，让人如沐春风；作为长辈，关怀备至，让人感念至深。在 此对导师表示衷心的感谢 感谢赵一超博士，在我这三年里的生活、学习和论文写作中给予的帮助，赵 一超博士亦师亦长亦友。感谢已经毕业的师兄卢全体、吴优、焦鹏、李仪、潘利 强、 朱留哲、 刘昂、 李森硕士， 你们给予我的帮助将永远铭记我心。 感谢权修才、 程志超硕士以及毕业的刘亚明、贾博宁硕士，是你们的同门之谊、兄弟之情陪我 度过了这美好的研究生时光；同样感谢师弟高晓君硕士，长江后浪推前浪，给课 题组注入了新的活力。 感谢一直关心与支持我的朋友们。 感谢杨铭硕士， 虽然只有短短两年的陪伴， 但这两年来学习了很多东西。感谢我的家人，他们的全力支持以及对我的鼓励， 使我能够顺利完成学业 在黄陵二号矿现场试验时， 矿领导、 生产科相关技术人员给予了我许多帮助， 公司相关领导在工作上的帮助以及科研上的启发令人如沐春风， 在此向他们表示 衷心的感谢。 最后，感谢各位专家、教授在百忙中对我的论文进行评审。 刘士杰 2017 年 4 月 万方数据 I 摘摘 要要 在巷道两侧采煤条件下，随着一侧回采面不断向巷道方向推进，在岩石自重 应力与构造应力的综合作用下， 巷道会受到采动的影响， 引起巷道围岩变形破坏， 当另一侧工作面回采时，巷道会受到二次采动的影响，巷道围岩往往变形破坏程 度进一步加剧。在深部软岩巷道中，这种采动效应会更加显著。因此，研究深部 软岩巷道围岩破坏机理分析与支护技术有着重要的意义。目前针对软岩巷道，主 要采用锚网索支护，然而，由于深部软岩巷道围岩的特殊性，锚网索支护有时不 能完全发挥其性能。为此，本论文通过对岩石力学测试、松动圈的测试、FLAC3D 数值模拟、工业性试验的研究方法，以黄陵二号井北翼巷道群 2 号辅运巷为工程 背景，详细分析了巷道破坏的因素并提出了有针对性的治理方法。主要研究内容 及成果如下 1）通过对巷道围岩采样进行力学测试，得出围岩物理力学参数，结合巷道 围岩的完整性程度，判断围岩为软岩，需要通过注浆加固改善围岩完整性与岩石 力学参数。通过塑性区理论和采动的影响分析，得出采高越大，支承压力越小。 关键层的断裂跨距越大，周期来压越大，煤体所受到的超前支承压力越大，影响 范围也大；停采线预留煤柱宽度太小，巷道受到的超前支承压力大，导致巷道发 生全断面破坏，需要合理确定预留煤柱宽度。 2）利用 FLAC3D数值软件进行模拟，得出单翼开采工作面最大支承压力为 28.62MPa（应力增高系数约为 2.2），最大垂直集中应力距离工作面 32.3m，工 作面前方约 202m 范围为工作面采动影响区域。双翼开采工作面停采线煤柱支承 压力显现特征，414 工作面停采线前方约 205m 范围为工作面采动影响区域，综 合考虑煤矿经济效益与巷道的承载能力，预留煤柱确定为 195m。 3）通过对巷道的松动圈测试，得出 2 号辅运大巷顶板松动圈范围 3.81m； 帮部松动圈范围 4.85m；对巷道围岩进行分类，属于 VI 级大松动圈极不稳定围 岩。 4）确定支护参数，进行工业性试验，通过对巷道加固后 200 天的矿压监测 显示巷道围岩在三个月后趋于稳定，顶板下沉量为 83mm，底板臌起量约为 180mm 左右，帮收缩量约为 54mm，有效控制了围岩变形，维护了巷道稳定性， 保证了巷道的正常使用。 该论文有图 73 幅，表 11 个，参考文献 72 篇。 关键词关键词软岩；数值模拟；松动圈；巷道支护；预留煤柱宽度 万方数据 II Abstract Under the condition of coal mining on both sides of the roadway, with the combination of the rocks own stress and tectonic stress, the roadway will be affected by the mining and the deation of the surrounding rock of the roadway , When the other side of the face mining, the roadway will be affected by the secondary mining, roadway of rock often deation and damage further intensified. In the deep soft rock roadway, this mining effect will be more significant. Therefore, it is of great significance to study the failure characteristics and support technology of deep soft rock roadway under the influence of mining. However, due to the particularity of the surrounding rock of the deep soft rock roadway, the anchorage cable support can not fully per its perance. For this reason, this paper makes full use of the theoretical analysis and loosening of the soft rock roadway, Circle test, FLAC3D numerical simulation, industrial test research , take Huangling No.2 well northbound roadway 2 auxiliary roadway as the project background, detailed analysis of the factors of roadway destruction and put forward targeted governance . The main research contents and achievements are as follows 1）Through the mechanical testing of roadway surrounding rock sampling, the physical and mechanical parameters of surrounding rock are obtained, and the degree of integrity of surrounding rock is obtained, and the surrounding rock is judged to be soft rock. The strength of roadway is low, the roof of the roadway has weak structure, and the gang is coal. It is necessary to improve the stability of surrounding rock and rock mechanics parameters by grouting reinforcement. That is, the higher the height , the smaller the bearing pressure. The greater the fracture distance of the key layer, the greater the pressure to the larger pressure, the greater the pressure of the coal bearing by the advance support, the scope of the impact is also large; stop mining line reserved pillar width is too small, the roadway by the advanced support pressure, Leading to full cross-section damage occurred in the roadway, the need to reasonably determine the width of the reserved pillar. 2）Using FLAC3D numerical software to simulate, it is concluded that the maximum concentrated stress working distance of working face is about 32.3m, the maximum bearing pressure is 28.62MPa stress increase coefficient is about 2.2, and the working area is about 202m Mining affected area;wiping mining face to stop mining coal pillar support pressure to show the characteristics of 414 working face to stop mining line in front of about 205m for the face of mining affected areas, 万方数据 III Considering the economic benefit of coal mine and the carrying capacity of roadway, the reserved coal pillar is determined as 195m. 3）through the loosening of the roadway test, the No. 2 auxiliary roadway loosening circle range of 3.81m; help loose circle range 4.85m; classification of roadway surrounding, belonging to the VI-level loose moving circle very unstable rock. 4）According to the monitoring of 200 days after the control of the roadway, the wall rock of the roadway is stabilized after three months, the roof sinking is about 83mm, and the floor volume is about 180mm or so, to help shrinkage of about 54mm, basically achieved the desired effect, effective control of the surrounding rock deation, maintaining the stability of the roadway to ensure the normal use of roadway. This paper has 73 figures,11 tables,72 references. KeywordsSoft rock;numerical simulation;loose circle;roadway support; Reserved pillar width 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........................................................................................................................ XII 变量注释表变量注释表 .............................................................................................................. XIII 1 绪论绪论............................................................................................................................ 1 1.1 工程背景 .......................................................................................................... 1 1.2 问题的提出及研究意义 .................................................................................. 6 1.3 国内外研究现状 .............................................................................................. 7 1.4 主要研究内容和技术路线 ............................................................................ 11 2 北翼大巷围岩赋存环境影响因素分析北翼大巷围岩赋存环境影响因素分析 ................................................................. 13 2.1 巷道围岩力学参数的测定 ............................................................................ 13 2.2 地应力预测 .................................................................................................... 23 2.3 采动的影响 .................................................................................................... 24 2.4 巷道围岩赋存环境及机理分析 .................................................................... 25 2.5 本章小结 ........................................................................................................ 27 3 预留煤柱宽度合理确定预留煤柱宽度合理确定 ......................................................................................... 29 3.1 单翼开采下采动影响分析 ............................................................................ 29 3.2 双翼开采下采动影响分析 ............................................................................ 33 3.3 本章小结 ........................................................................................................ 38 4 松动圈的测试及加固技术分析松动圈的测试及加固技术分析 ............................................................................. 39 4.1 松动圈测试的设备及方案 ............................................................................ 39 4.2 松动圈测试 .................................................................................................... 41 4.3 松动圈范围分析 ............................................................................................ 55 4.4 加固关键技术 ................................................................................................ 57 4.5 本章小结 ........................................................................................................ 60 5 工业性试验工业性试验 ............................................................................................................. 61 5.1 2 号辅运巷地质概况 ................................................................................... 61 5.2 加固参数及方案 ............................................................................................ 62 万方数据 V 5.3 矿压的监测 .................................................................................................... 67 5.4 本章小结 ........................................................................................................ 69 6 结论结论........................................................................................................................... 70 参考文献参考文献 ..................................................................................................................... 71 作者简历作者简历 ..................................................................................................................... 75 学位论文原创性声明学位论文原创性声明 ................................................................................................. 76 学位论文数据集学位论文数据集 ......................................................................................................... 77 万方数据 VI Contents Abstract ........................................................................................................................ II Contents ...................................................................................................................... VI List of Figures .......................................................................................................... VIII List of Tables ............................................................................................................. XII Variable Annotation Tables .................................................................................... XIII 1 Introduction ............................................................................................................... 1 1.1 Project Background ........................................................................................... 1 1.2 The Proposition of the Problem and the Significance of the Study .................. 6 1.3 Research Status at Home and Abroad ............................................................... 7 1.4 Main Research Content and Technical Route ................................................. 11 2 The Analysis of the Factors Affecting Occurrence Environment of Surrounding Rock in North Wing Roadway .................................................................................. 13 2.1 Measurement of Mechanical Parameters of Roadway Surrounding Rock ..... 13 2.2 Prediction of Ground Stress ............................................................................ 23 2.3 The Impact of Mining ..................................................................................... 24 2.4 Occurrence Environment and Mechanism Analysis of Roadway Surrounding Rock ...................................................................................................................... 25 2.5 Summary ......................................................................................................... 27 3 The Width of the reserved Coal Pillar is Reasonably Determined ..................... 29 3.1 Analysis on Influence of Mining under single - Wing Mining ....................... 29 3.2 Analysis on the Influence of Mining Technology in Wings ............................ 33 3.3 Summary ......................................................................................................... 38 4 Test and Reinforcement Technology Analysis of Loose Loop ............................. 39 4.1 Loosening Test Equipment and Programs ...................................................... 39 4.2 The Loose Circle Test ..................................................................................... 41 4.3 Analysis on the Range of Loose Circle ........................................................... 55 4.4 Reinforcement of Key Technologies ............................................................... 57 4.5 Summary ......................................................................................................... 60 5 Industrial Test .......................................................................................................... 61 万方数据 VII 5.1 Geological Survey of No.2 Auxiliary Roadway ............................................. 61 5.2 Reinforcement Parameters and Scheme .......................................................... 62 5.3 Detection of Mine Pressure ............................................................................. 67 5.4 Summary ......................................................................................................... 69 6 Conclusion ............................................................................................................... 70 References ................................................................................................................... 71 Author’s Resume ........................................................................................................ 75 Declaration of thesis originality ................................................................................ 76 Thesis Data Collection .................................................................................