老采空区下长壁工作面覆岩隔离注浆充填试验研究.pdf

硕士学位论文 老采空区下长壁工作面覆岩隔离注浆充填 试验研究 Experimental study regarding longwall face which is under the old goaf by grouting backfill into isolated areas 作 者邱平 导 师许家林 教授 中国矿业大学 二○一七年五月 国家自然科学基金资助项目（51604258） 江苏省自然科学基金资助项目（BK20150194） 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 硕士学位论文 老采空区下长壁工作面覆岩隔离注浆充填试验 研究 Experimental study regarding longwall face which is under the old goaf by grouting backfill into isolated areas 作 者 邱平 导 师 许家林 申请学位 工学硕士学位 培养单位 矿业工程学院 学科专业 采矿工程 研究方向 绿色开采 答辩委员会主席 谢耀社 评 阅 人 朱卫兵、董祥林 二○一七年五月 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 致致 谢谢 光阴荏苒，硕士研究生的学习即将结束，三年的学习生活使我受益匪浅。值 此毕业之际，我谨向所有关心、爱护、帮助我的人致以最诚挚的感谢与最美好的 祝愿。 首先，我要深深感谢我的导师许家林教授。论文从选题、理论分析、模拟研 究至完成，每一步都是在许老师的亲自指导下完成的，倾注了导师的大量心血与 汗水。导师学识渊博，对专业孜孜以求，精益求精。百忙之余仍然读书不辍，不 断探求；为人师表，率先垂范；传道授业，呕心沥血。如果说我从导师那里学会 了怎样做好学问，那么首先应该说我从导师那里领略了真正的学术精神，导师严 谨的治学态度和坚韧的探索精神将使我终生受益。 在此我向我的导师许家林教授 表示深切的谢意与祝福 本论文的完成也离不开课题组诸位老师的指导与帮助，感谢朱卫兵副教授、 胡国忠副教授、谢建林老师、陈大勇老师、鞠金峰老师、秦伟老师的指点，他们 在模拟方案的设计、数据的分析处理、论文的通篇布局和写作中都提出了很多宝 贵意见，对于他们的帮助，我铭感于心。 感谢王晓振老师和轩大洋老师这三年来教会我分析问题的方法和数据处理 的技巧，以及在研究方向上对我的积极引导和传授，尤其是在我硕士论文撰写期 间给予的关切和帮助，在此非常感谢 感谢汪峰、 王秉龙、滕浩、何昌春、李竹、韩红凯等博士，程玉印、 董军业、 张冬冬、于佳佳、胡楠、刘传振、甘满光、鹿怀坦、刘樟平、徐敬明、张亮、张 凯、王超超等硕士在论文撰写中给予的极大帮助，在此衷心的感谢他们 感谢淮北矿业集团刘店煤矿和淮北勘探公司的诸位领导及员工在我出差期 间给予的关怀和帮助。 父母的期望是我前进的最大动力， 感谢父母在我求学生涯中给与我无微不至 的关怀和照顾，一如既往地支持我、鼓励我，同时感谢所有亲人、朋友给予我的 帮助和鼓励，是你们的理解和支持让我走的更远。 衷心地感谢各位专家、教授在百忙之中评审本文，由于作者水平有限，文中 定有许多疏漏和不足之处，热切希望得到批评、指正 邱平 二○一七年五月 万方数据 I 摘要摘要 覆岩隔离注浆充填是通过设计合理的工作面采宽并留设一定宽度的隔离煤 柱， 充分利用上覆岩层结构的自承载能力，通过地面钻孔对采动覆岩高压注浆充 填在工作面中部形成一定宽度的压实支撑区， 利用压实区与隔离煤柱联合控制覆 岩关键层结构的稳定性，从而减少地表下沉、实现不迁村采煤的技术。以往，该 技术主要在单一煤层初采条件下进行应用，而重复采动条件下未进行试验，比如 老采空区下多煤层开采。重复采动情况在煤矿中较普遍，且对地表移动变形的破 坏一般要远大于初次采动， 因此研究老采空区下重复采动长壁工作面覆岩隔离注 浆充填试验研究具有重要的意义。 论文以数值模拟为主要研究手段， 结合临涣煤矿工程实测数据分析老采空区 下长壁工作面覆岩隔离注浆充填试验效果， 从而得出了重复采动条件下和无重复 采动条件下覆岩隔离注浆充填的地表沉陷控制效果差异。 研究得出了在 7 煤老采空区条件下长壁工作面覆岩隔离注浆充填的地表沉 陷控制效果与无老采空区条件下的差异。在控制相同注采比时，无老采空区条件 下煤层工作面覆岩隔离注浆充填后的地表最大下沉值为 201mm，而存在上覆单 一煤层老采空区的条件下，再进行下煤层覆岩隔离注浆充填开采时，地表最大下 沉增至 282mm， 虽然下沉量有一定增加， 但较无老采空区条件下没有显著变化， 即实施覆岩隔离注浆充填的难度未出现本质变化，尽管如此，仍然需要对注浆充 填工艺进行改进。 研究得出了在 7 煤、9 煤老采空区条件下长壁工作面覆岩隔离注浆充填的地 表沉陷控制效果与无老采空区条件下的差异。在控制相同注采比时，无老采空区 条件下煤层工作面覆岩隔离注浆充填后的地表最大下沉值为 345mm，而存在上 覆两个煤层老采空区的条件下，再进行下煤层覆岩隔离注浆充填开采时，地表最 大下沉增至 418mm，虽然下沉量有一定增加，但较无老采空区条件下没有显著 变化，即实施覆岩隔离注浆充填的难度未出现本质变化，尽管如此，仍然需要对 注浆充填工艺进行改进。 现场工程实测数据表明，淮北临涣煤矿 II923 里工作面在上覆 7 煤已采的情 况下进行覆岩隔离注浆充填开采后， 实测地表地表最大下沉为 206.9mm， 地面建 （构）筑均没有破坏，地面建筑物得到了有效的保护。实践表明，重复采动条件 下通过合理设计注浆层位、注浆压力、采宽等进行覆岩隔离注浆充填是可以达到 不迁村采煤目的。 该论文有图 41 幅，表 7 个，参考文献 111 篇。 关键词关键词重复采动；覆岩隔离注浆充填；地表沉陷；注浆充填层位；绿色开 万方数据 II Abstract The theory of grouting backfill into isolated areas are mainly by design reasonable cut mining width and setting up relative width of separate pillar, make full use the self-supporting capacity of surrounding rock on the roof. By backfilling to the drill hole on the ground with high pressure, the compacted grip zone will generate in the middle of the working face which can give a support together with key stratum structure. It will decrease the surface subsidence and get the achievement of none-village-relocation. This technique is used without too much experience repeated coal-mining. Nevertheless, repeated coal-mining is more normal with great influence to surface subsidence. The significance obviously is there for longwall face which is under the old goaf by grouting backfill into isolated areas. Numerical simulation is the main research for the thesis. Also, some measured data is also combined here. By that, it has been obtained the conclusion of surface subsidence regularity of both repeated and un-repeated coal-mining by grouting backfill into isolated areas. The results show that the 7 coal effect of surface subsidence control in the long wall face of single coal seam under the condition of non repeated mining. In the control of the same injection production ratio, non repeated mining under the conditions of coal seam overlying surface rock grouting after isolation of maximum subsidence value is 201mm, while in the repeated mining conditions for the existence of a single overlying coal seam goaf, then strata isolation grouting filling mining, the maximum surface subsidence to 282mm, although the sinking of a certain increase, but compared with non repeated mining conditions did not change significantly, namely the implementation of overburden isolation grouting filling difficulty does not appear essential changes, however, It is still necessary to improve the filling process. The results show that the 7 coal 9 coal effect of the surface subsidence control and the non repeated mining conditions of the two layers of coal seam in the goaf under the long wall face. In the control of the same injection production ratio, non repeated mining under the conditions of coal seam overlying surface rock grouting after isolation of maximum subsidence value is 345mm, and 2 in the presence of the overlying coal seam goaf of repeated mining conditions, then strata grouting backfill mining isolation, surface the maximum subsidence increased to 418mm, while the sinking of a certain increase, but compared with non repeated mining conditions did not change significantly, namely the implementation of overburden isolation grouting 万方数据 III filling difficulty does not appear essential changes, It is still necessary to improve the filling process. The measurement in site shows that the maximum subsidence is only 266mm in II923 working face of Linhuan Coal Mine without 7 layer with grouting backfill into isolated areas. The maximum subsidence of II1021 working face is only 300mm which is under the process of grouting backfill into isolated areas. Both experimental data in the lab and on the site show that it feasible to fulfill the target of non-village-relocation by design reasonable drills, backfill pressure, cut width even under the situation of repeated coal-mining. There are 41 figures, 7 tables and 111 references in this thesis. Keywords repeated coal-mining; grouting backfill into isolated areas; surface subsidence; grouting layer; green mining 万方数据 IV 目录目录 摘要摘要 ............................................................................................................................... I 目录目录 .............................................................................................................................. V 图清单图清单 ........................................................................................................................ IX 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 研究的目的和意义................................................................................................. 1 1.2 充填技术国内外研究现状..................................................................................... 2 1.3 主要研究内容和技术路线................................................................................... 10 2 试验区域基本条件试验区域基本条件 ................................................................................................. 13 2.1 采区概况............................................................................................................... 13 2.2 地质条件............................................................................................................... 14 2.3 开采条件............................................................................................................... 18 3 7 煤煤采空区下采空区下 9 煤隔离注浆充填模拟研究煤隔离注浆充填模拟研究 ........................................................... 21 3.1 建立数值模拟模型............................................................................................... 21 3.2 模拟方案设计....................................................................................................... 22 3.3 数值模拟结果....................................................................................................... 23 3.4 本章小结............................................................................................................... 33 4 7 煤煤、、9 煤煤采空区下采空区下 10 煤隔离注浆充填模拟研究煤隔离注浆充填模拟研究 .............................................. 35 4.1 建立数值模拟模型................................................................................................ 35 4.2 模拟方案设计........................................................................................................ 35 4.3 数值模拟结果........................................................................................................ 36 4.4 本章小结................................................................................................................ 43 5 工程应用工程应用 ................................................................................................................. 45 5.1 总体情况............................................................................................................... 45 5.2 工程实施效果....................................................................................................... 47 5.3 本章小结............................................................................................................... 50 6 主要主要结论与展望结论与展望 ....................................................................................................... 51 6.1 主要结论............................................................................................................... 51 6.2 工作展望............................................................................................................... 52 参考文献参考文献 ..................................................................................................................... 53 万方数据 V 作者简历作者简历 ..................................................................................................................... 59 学位论文原创性声明学位论文原创性声明 ................................................................................................. 60 学位论文数据集学位论文数据集 ......................................................................................................... 61 万方数据 VI Contents Abstract ....................................................................................................................... ⅢⅢ Contents ...................................................................................................................... ⅦⅦ List of Figures ............................................................................................................ IX List of Tables .............................................................................................................. XI List of Variables........................................................................................................ XII 1 Introduction ............................................................................................................... 1 1.1 Introduction of the Problem and Research Meaning ............................................... 1 1.2 Research Situation of Filling Mining Technology at Home and Abroad ................. 2 1.3 Research Contents and Research s ............................................................ 10 2 Basic conditions for the test area ........................................................................... 13 2.1 Mining situation ..................................................................................................... 13 2.2 Geological conditions ............................................................................................ 14 2.3 mining conditions................................................................................................... 18 3 Simulation study of 9 coal seam isolation grouting filling in 7 coal mined out area .............................................................................................................................. 21 3.1 Establish a numerical simulation model ................................................................ 21 3.2 Simulation scheme design...................................................................................... 22 3.3 Analysis Simulation Result .................................................................................... 23 3.4 Chapter Summary .................................................................................................. 33 4 Simulation study of 10 coal seam isolation grouting filling under 7 coal and 9 coal mined out area .................................................................................................... 35 4.1 Establish a numerical simulation model ................................................................ 35 4.2 Simulation scheme design...................................................................................... 35 4.3 Analysis Simulation Result .................................................................................... 36 4.4 Chapter Summary .................................................................................................. 43 5 Engineering application ......................................................................................... 45 5.1 Overall condition ................................................................................................... 45 5.2 Construction effect analysis of Project .................................................................. 47 5.3 Chapter Summary .................................................................................................. 50 6 Main conclusion of the thesis and Work outlook ................................................. 51 6.1 Main Conclusion .................................................................................................... 51 万方数据 VII 6.2 Work Outlook ......................................................................................................... 52 Reference .................................................................................................................... 53 Author ，，s Resume ....................................................................................................... 60 Declaration of thesis originality ................................................................................ 62 Thesis Date Collection ............................................................................................... 64 万方数据 VII