多煤层重复跨采底板巷道围岩控制技术研究.pdf

硕士学位论文 多煤层重复跨采底板巷道围岩控制技术研究 Study on the Technology of Surrounding Rock Control in Floor Roadway under Repeated Overhead Mining 作 者李亚运 导 师谢文兵 教授 中国矿业大学 二○一五年五月 江苏高校优势学科建设工程资助项目 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 多煤层重复跨采底板巷道围岩控制技术研究 Study on the Technology of Surrounding Rock Control in Floor Roadway under Repeated Overhead Mining 作 者 李亚运 导 师 谢文兵 教授 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 矿山压力及其控制 答辩委员会主席 曹胜根教授 评 阅 人 张益东、汪长平 二○一五年五月 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 论文审阅认定书 论文审阅认定书 研究生 李亚运 在规定的学习年限内，按照研究生培养方案的要 求，完成了研究生课程的学习，成绩合格；在我的指导下完成本学位论 文，经审阅，论文中的观点、数据、表述和结构为我所认同，论文撰写 格式符合学校的相关规定，同意将本论文作为学位申请论文送专家评审。 导师签字 年 月 日 万方数据 致谢 致谢 本论文是在谢文兵教授的悉心指导下完成的，从论文的选题、研究方案的确定到 论文的写作，都得到了恩师全方位的指导和培养。没有他的指导、鼓励，论文是不可 能得以顺利完成的。在此，谨向我的导师致以深深的敬意和感谢 同时感谢荆升国老师在我三年研究生期间给予的无私帮助和真诚关怀 从本科毕 业设计到项目方案撰写、从学校到煤矿生产现场都得到了荆升国老师悉心的指导，并 在论文写作过程中提供了大量宝贵意见。 再者感谢娄培杰博士、王其洲博士在我的学习生活中给予的帮助和支持感谢陈 杰、郑建彬、宋浬永、刘晨晨、赵金帅、谢涛锋、陈振亚、朱琦、张剑、王兴开、苏 智立、王浩、刘畅、王维庆、周长浩等硕士在我论文写作期间提供的许多宝贵建议和 帮助感谢臧龙、曹明、丁国峰、时吉贺、钟耀华、范洪飞、安宇、申金帅、刘家启 李鉴等已毕业硕士在我读研期间给予的关心和鼓励 感谢给予我在现场研究和学习生活中提供大量帮助和宝贵建议的领导和工程技 术人员。 感谢我的父母及家人对我无私的爱与辛勤的付出 最后，衷心感谢各位专家、教授在百忙之中评阅本论文，并真诚地期望得到更多 的指导和启迪 李亚运 2015 年 5 月 万方数据 I 摘 要 摘 要 布置在煤层底板巷道大多要经受工作面跨采影响，这些巷道在未受采动影响前， 往往能够保持长期稳定， 一旦受到采动影响， 则遭到失稳破坏， 影响煤矿的安全生产， 尤其是受上覆多煤层重复跨采影响底板巷道围岩变形极为强烈， 严重影响煤矿正常安 全生产。与单一煤层开采相比较，多煤层重复跨采底板巷道经受上覆工作面多次采动 影响，围岩变形严重，一般支护手段难以有效控制巷道围岩变形。因此，对多煤层重 复跨采底板巷道围岩稳定性分析及控制技术研究，具有重要的现实意义。 本文以芦岭煤矿Ⅱ2 采区石门受上覆 8、9 煤层重复跨采影响为研究背景，采用 现场调查、理论分析及数值模拟等手段，对多煤层重复跨采底板巷道围岩稳定性及控 制技术进行研究分析，首先，结合芦岭煤矿实际采矿地质条件，应用弹性力学半无限 理论，对采场底板围岩应力分量、底板破坏深度进行应力解析计算，并建立了相应的 数值模型，对工作面重复采动影响下底板围岩应力分布及变化规律进行了总结分析； 然后，采用 FLAC2D 数值模拟软件对多煤层重复跨采下底板巷道围岩稳定性进行模 拟分析，对静压条件、单个工作面跨采、重复跨采三种条件下底板巷道的活动规律进 行对比，分析重复跨采下底板巷道的失稳特征与变形规律；接着，在上述研究分析的 基础上，基于动压影响巷道围岩控制基本准则，提出多煤层重复跨采底板巷道的围岩 控制技术-支护承载强化技术，并采用数值模拟的方法分析了支护承载结构强化技术 对底板巷道围岩稳定性的作用效果；最后，结合芦岭煤矿Ⅱ2 采区石门的采矿地质条 件，提出支护承载结构强化技术方案，现场工业性试验结果表明，受到上覆工作面采 动影响后，巷道围岩变形量控制在允许范围内，试验效果良好。 该论文有图 56 幅，表 1 个，参考文献 89 篇。 关键词关键词多煤层；重复跨采；底板巷道；围岩控制 万方数据 II Abstract To keep long-term stability of roadways, the floor roadways are maintained through overhead mining in most of coal mines in China. However, some roadways could keep long-term stability when they were not affected by mining influence. On the contrary, they would be unstable failure and threaten coal mine safety production. Compared with the single coal seam mining, the floor roadway under repeated overhead mining, facing repeatedly overburden mining influence,deate seriously. General support means is difficult to effectively control the surrounding rock deation. Therefore, the study on the stability of surrounding rock and the technology of surrounding rock control in floor roadway under repeated overhead mining has great significance. According to Ⅱ2 mining area cross-cut in Luling Coal Mine, which is affected by 8 coal seam and 9 coal seam, by using site investigation, theoretical analysis, numerical simulations and field test s, the stability of surrounding rock and the technology of surrounding rock control in floor roadway under repeated overhead mining are studied on in this paper.Firstly, based on the actual mining geological conditions in Luling coal mine, by using the theory of semi-infinite elasticity, stress calculation of the stress component under the stope is given in this paper, and the distribution and variation of the surrounding rock are analyzed by the corresponding numerical simulation model. Then, using numerical analysis of FLAC2D , the stability of surrounding rock in floor roadway under repeated overhead mining is analyzed, and by the the comparison on activity rhythm among the three different mining influence the instability feature and deation law of the floor roadway is analyzed. Next, based on the above studies and the stability control principle of surrounding rock in the roadway under dynamic pressure, this paper put forward the reinforcement technology, and the effectiveness of the technology on the surrounding rock control of floor roadway under repeated overhead mining is verified by using numerical simulation measure. At last, according to the geological and mining conditions of Ⅱ2 mining area cross-cut in Luling Coal Mine, using the reinforcement technology with two high strength bolt-mesh-cable, this paper designed the scheme of controlling surrounding rock to conduct site industrial test. Field tracing test data showed that Ⅱ2 new air returning uphill roadway was always under control within allowed range after the overlying coal seam was mining, and the test result was good. The paper has 56 figures, 1 table, 89 references. 万方数据 III Key words multiple coal seams； repeated overhead mining； floor roadway； surrounding rock control 万方数据 IV 目 录 目 录 摘 要摘 要 .................................................................................................................................... I 目 录目 录 ................................................................................................................................. IV 图清单图清单 .............................................................................................................................. VIII 表清单表清单 ................................................................................................................................. XI 变量注释表变量注释表 ....................................................................................................................... XII 1 绪论绪论 ................................................................................................................................... 1 1.1 研究背景及意义 ............................................................................................................ 1 1.2 国内外研究现状 ............................................................................................................ 2 1.3 试验巷道概述 ................................................................................................................. 8 1.4 研究内容与技术路线 .................................................................................................. 10 2 多煤层重复跨采底板围岩应力分布多煤层重复跨采底板围岩应力分布 ............................................................................. 12 2.1 采场底板围岩应力分布与破坏深度计算 .................................................................. 12 2.2 采场底板围岩应力演化数值模拟分析 ...................................................................... 18 2.3 本章小结 ...................................................................................................................... 23 3 多煤层重复采动对底板巷道围岩稳定性影响分析多煤层重复采动对底板巷道围岩稳定性影响分析 ..................................................... 24 3.1 模型的建立 .................................................................................................................. 24 3.2 多煤层重复采动效应数值模拟分析 .......................................................................... 25 3.3 本章小结 ...................................................................................................................... 43 4 多煤层重复跨采底板巷道围岩控制技术多煤层重复跨采底板巷道围岩控制技术 ..................................................................... 44 4.1 动压影响底板巷道围岩控制原则 .............................................................................. 44 4.2 支护承载结构强化技术 .............................................................................................. 45 4.3 U 型钢支架与围岩相互作用关系分析 ....................................................................... 47 4.4 锚索对支护承载结构强化效果分析 .......................................................................... 50 4.5 本章小结 ...................................................................................................................... 54 5 现场工业性试验现场工业性试验 ............................................................................................................. 55 5.1 Ⅱ2 采区石门失稳、破坏原因分析 ........................................................................... 55 5.2 围岩结构强化技术方案 .............................................................................................. 57 5.3 施工质量管理 .............................................................................................................. 61 万方数据 V 5.4 支护效果分析 .............................................................................................................. 62 5.5 本章小结 ...................................................................................................................... 65 6 结论结论 ................................................................................................................................. 66 参考文献参考文献 ............................................................................................................................. 67 作者简历作者简历 ............................................................................................................................. 72 学位论文原创性声明学位论文原创性声明 ......................................................................................................... 73 学位论文数据集学位论文数据集 ................................................................................................................. 74 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 Research Background and Significance .......................................................................... 1 1.2 esearch Status at Home and Abroad ................................................................................ 2 1.3 Introduction of Test Roadway ......................................................................................... 8 1.4 Research Contents and Technological Route ................................................................ 10 2 The Stress Distribution of Surrounding Rocks under Repeated Overhead Mining. 12 2.1 Calculation of Stress Distribution and Damage Depth of Surrounding Rock in the Floor ............................................................................................................................................. 12 2.2 Numerical Simulation Analysis on Stress Evolution of Surrounding Rock under the Working Face ....................................................................................................................... 18 2.3 Brief Summary .............................................................................................................. 23 3 The Stability Analysis of Surrounding Rock in Floor Roadway under Repeated Overhead Mining ............................................................................................................... 24 3.1 Model Foundation ......................................................................................................... 24 3.2 Numerical Simulation Analysis on the Effect of Repeated Coal-mining ...................... 25 3.3 Brief Summary .............................................................................................................. 43 4 The Control Technology of Surrounding Rock in Floor Roadway under Repeated Overhead Mining ............................................................................................................... 44 4.1 The Roadway Control Principle under the Influence of Dynamic Pressure .................. 44 4.2 Strengthening Technology of Supporting Structure ...................................................... 45 4.3 Analysis on the Interaction between U-steel Support and Surrounding Rock .............. 47 4.4 Analysis of the Strengthening Technology of the Supporting Structure ....................... 50 4.5 Brief Summary .............................................................................................................. 54 5 Field Industrial Test ....................................................................................................... 55 万方数据 VII 5.1 Analysis on Ⅱ2 Mining Area Transport Uphill Roadway Broken Reason ................. 55 5.2 Structure Strengthening Technology Program for Roadway ......................................... 57 5.3 The Construction Quality Management ....................................................................... 61 5.4 Analysis on Support Effect ............................................................................................ 62 5.5 Chapter Summary .......................................................................................................... 65 6 Conclusions ..................................................................................................................... 66 References ........................................................................................................................... 67 Author’s Resume ............................................................................................................... 72 Declaration of Thesis Originality ..................................................................................... 73 Thesis Date Collection ....................................................................................................... 74 万方数据 VIII 图清单 图清单 图序号 图名称 页码 图 1-1 巷道与工作面平面位置关系图 8 Figure 1-1 Relationship diagram between roadway and mining workface 8 图 1-2 Ⅱ2 采区综合柱状图 9 Figure 1-2 Coal histogram of Ⅱ2 mining area 9 图 1-3 动压影响下巷道变形情况 10 Figure 1-3 Roadway deation influenced by dynamic pressure 10 图 1-4 研究技术路线 11 Figure 1-4 Research technical route 11 图 2-1 工作面前后支承压力分布 12 Figure 2-1 The distribution of abutment pressure in working face 12 图 2-2 煤层底板岩体沿工作面走向的受力模型 13 Figure 2-2 The force model of floor strata under working face 13 图 2-3 应力增量分布计算简图 13 Figure 2-3 The calculating diagram of Stress increment 13 图 2-4 地基中的极限平衡区 15 Figure 2-4 Limi