破碎矸石压实特性的时效性研究.pdf

硕士学位论文 破碎矸石压实特性的时效性研究 Study on the Timeliness of Compaction Characteristics of Crushed Gangue 作 者王逸鸣 导 师陈占清 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 TD821 学校代码 10290 UDC 密 级 公开 中国矿业大学 硕士学位论文 破碎矸石压实特性的时效性研究 Stability Analysis of Rib Pillar in Highwall Mining under Dynamic and Static Loads 作 者 王逸鸣 导 师 陈占清 教授 申请学位 工学硕士 培养单位 力学与土木工程学院 学科专业 工程力学 研究方向 岩石力学理论与应用 答辩委员会主席 马占国 评 阅 人 二○一九年五月 万方数据 致谢致谢 时光荏苒，三年的研究生生涯转瞬即逝，在矿大的学习和生活中，我收获良 多。在即将毕业之际，我非常感谢研究生期间各位帮助过我的老师、同学、亲人 和朋友们，是你们的关心和鼓励让我度过了这三年珍贵的研究生时光，在此我向 你们表示衷心的感谢 首先我要感谢我的研究生导师陈占清教授 感谢陈老师在过去三年中提供的 悉心指导，陈老师渊博的学术知识和严谨的学术研究态度使我获益良多。陈老师 为我指明了研究方向，并提供了细致的学术指导和良好的试验条件，从课题的入 门、科研项目的成功实践，到小论文以及毕业论文的撰写，我在研究生期间取得 的每一个小成果都离不开陈老师的关心和督促。除了学术方面，陈老师在工作态 度和人格风范上更加深深影响了我。值此论文完成之际，对陈老师致以崇高的敬 意和衷心的感谢 特别感谢茅献彪教授、白海波研究员、殷祥超教授、张凯研究员、赵玉成教 授、浦海教授、卢爱红教授、周跃进教授、吴宇副研究员、张桂民副教授、张后 全副教授、巨峰副研究员、刘江峰副研究员、冯梅梅副教授、李明助理研究员等 在学术论文写作方面给予的指导 同时感谢吴疆宇博士、 郭静那博士、 李樯博士、 吴豪帅博士、石浩博士、陶静博士、陈梁博士、崔灿博士等给我在论文写作上的 指导感谢李焘硕士、胡善超硕士、吴鹏硕士、安超硕士、姚本余硕士、张文力 硕士、谢晋勇硕士、王贞硕硕士、滕毅硕士、常西亚硕士、薛欣然硕士、于渤松 硕士、谷邱鑫硕士、郝观硕士、林钢硕士、冯志威硕士、高鑫硕士、龚是帅硕士 等多年同窗在论文写作过程中给予的帮助 感谢父母和亲人们在我求学阶段的无私奉献与付出， 感谢家人对我学业的理 解、关怀和支持 感谢论文所引文献的作者 感谢所有帮助和关心我的人 感谢各位专家和学者在百忙之中评审论文， 衷心感谢您提供的宝贵意见和建 议 万方数据 I 摘摘 要要 固体矸石充填体的压实变形直接影响煤矿采空区上覆岩层位移场和应力场。 研究矸石充填体的压实力学特性、探讨矸石充填体的蠕变变形机理、分析矸石充 填开采过程中采场位移场和应力场的演化规律是采空区上方地表建筑物和构筑 物安全评估的基础性研究课题，对实现“三下”安全采煤具有重要的理论价值和 工程意义。本文综合运用室内试验、理论研究及数值模拟等方法，系统地研究了 矸石充填开采对覆岩移动变形规律的影响。 通过室内试验得到了矸石充填体的压 实性能和蠕变性能，构建了矸石充填体的应力-应变关系；运用 Winkler 地基梁 理论分析了采空区顶板的弯曲变形规律； 通过数值模拟分析了采空区位移场和应 力场的分布与变化规律。通过研究得到主要成果 （1）通过矸石充填体的侧限压实试验，分析了颗粒级配（Talbot 指数）、材 料配比（水灰质量比）对矸石充填体压缩模量、孔隙率、压实度和碎胀系数的影 响规律，并构建了一种侧限矸石充填体本构模型。 （2）通过矸石充填体的压实蠕变试验，得到了矸石充填体轴向应变和孔隙 率随时间变化的关系，构建了非线性黏弹塑性蠕变模型，并分析了颗粒级配 （Talbot 指数）对蠕变参量的影响。 （3）分析了传统垮落法开采和充填开采中覆岩移动特征，基于弹性地基梁 理论建立了一种矸石充填开采覆岩移动力学模型， 进而得到煤层区和充填区对顶 板支撑应力的表达式。 （4）利用数值模拟软件 FLAC3D结合采场实际地质参数建立矿区三维模型。 根据矸石压实试验数据，利用 FLAC3D内置的 FISH 语言，编制出矸石充填体非 线性压实本构关系的代码， 计算覆岩的位移场和应力场。 分析了颗粒级配 （Talbot 指数）、充填率和材料配比（水灰质量比）对覆岩变形的影响，得到了一种矸石 充填开采最优级配方案。 本论文有图 43 幅，表 15 个，参考文献 112 篇。 关键词关键词矸石充填体；压实特性；蠕变；覆岩移动 万方数据 万方数据 III Abstract The compaction deation of solid gangue backfill directly affects the displacement field and stress field of overlying strata in goaf.Studying the compaction mechanical properties of gangue backfill, discussing the creep deation mechanism of gangue backfill, and analyzing the evolution law of stop field and stress field during the process of gangue filling mining are the basis for the safety assessment of surface buildings and structures above the goaf. The research topic of sexuality has important theoretical and engineering significance for the realization of “three down“ safe coal mining. In this paper, the effect of gangue filling mining on overburden movement and deation is systematically studied by laboratory test, theoretical study and numerical simulation.The compaction and creep properties of gangue backfill are obtained through laboratory tests, and the stress-strain relationship of gangue backfill is constructed.Winkler foundation beam theory was used to analyze the bending deation law of goaf roof.The distribution and variation of goaf displacement field and stress field are analyzed by numerical simulation.Main results obtained through research （1）Through the compaction creep test of gangue backfill, the influence laws of particle grading Talbot index and material ratio water-cement mass ratio on the compression modulus, porosity, compaction degree and crushing expansion coefficient of gangue backfill are analyzed, and a constitutive model of gangue backfill with lateral confined is constructed. （2）Through the compaction creep test of gangue backfill, the relation between the axial strain and porosity change with time was obtained, the nonlinear viscoelastoplastic creep model was established, and the influence of particle grading Talbot index on creep parameters was analyzed. （3）The movement characteristics of overburden in traditional caving mining and filling mining are analyzed. Based on the elastic foundation beam theory, a mechanical model of overburden movement in gangue filling mining is established, and the expressions of roof support stress in coal seam area and filling area are obtained. （4）The numerical simulation software FLAC3D is used to establish a three-dimensional model of the mining area combined with the actual geological parameters of the stope.According to the data of gangue compaction test, the code of 万方数据 IV nonlinear compaction constitutive relation of gangue backfill is compiled by using FISH language built into FLAC3D，and the displacement field and stress field of overburden are calculated.The effects of gangue grading Talbot index, filling rate and material ratio water-cement mass ratio on overburden deation are analyzed, and an optimal grading scheme for gangue filling mining is obtained. The paper includes 43 figures, 15 tables and 112 references. Keyword Gangue backfill; The compaction characteristics; Creep; Strata movement 万方数据 V 目目 录录 摘摘 要要............................................................................................................................ I 目目 录录........................................................................................................................... V 图清单图清单......................................................................................................................... IX 表清单表清单...................................................................................................................... XIII 变量注释表变量注释表 ............................................................................................................... XV 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 主要研究内容与方法 ............................................................................................. 5 2 矸石充填体的压实力学性质试验矸石充填体的压实力学性质试验 ........................................................................... 8 2.1 矸石充填体的几何性质与力学性质 ...................................................................... 8 2.2 试验设备和方法 .................................................................................................... 11 2.3 试验方案 ................................................................................................................ 13 2.4 试验结果与分析 .................................................................................................... 14 2.5 颗粒级配的影响 .................................................................................................... 16 2.6 材料配比的影响 .................................................................................................... 23 2.7 侧限矸石充填体的本构模型 ................................................................................ 24 2.8 本章小结 ................................................................................................................ 28 3 矸石充填体的压实蠕变力矸石充填体的压实蠕变力学性质试验学性质试验 .................................................................. 29 3.1 试验设备和方法 .................................................................................................... 29 3.2 试验方案 ................................................................................................................ 29 3.3 应变-时间关系 ...................................................................................................... 30 3.4 孔隙率-时间关系 .................................................................................................. 33 3.5 矸石充填体的压实蠕变模型 ................................................................................ 35 3.6 本章小结 ............................................................................................................... 38 4 矸石充矸石充填开采覆岩移动力学模型及分析填开采覆岩移动力学模型及分析 ............................................................. 40 4.1 矸石充填开采覆岩移动特征分析 ........................................................................ 40 4.2 矸石充填开采覆岩移动力学模型的适用条件 .................................................... 41 4.3 矸石充填开采覆岩移动力学模型 ........................................................................ 43 万方数据 VI 4.4 本章小结 ............................................................................................................... 49 5 矸石充填开采覆岩移动变形规律的数值模拟研究矸石充填开采覆岩移动变形规律的数值模拟研究 .............................................. 51 5.1 数值模拟软件简介 ................................................................................................ 51 5.2 数值模拟方案的确定 ............................................................................................ 52 5.3 数值模型的建立 .................................................................................................... 54 5.4 数值模拟的结果分析 ............................................................................................ 55 5.5 本章小结 ............................................................................................................... 67 6 结论与展望结论与展望 ............................................................................................................. 68 6.1 主要结论 ............................................................................................................... 68 6.2 研究展望 ............................................................................................................... 69 参考文献参考文献 ..................................................................................................................... 70 作者简历作者简历 ..................................................................................................................... 77 学位论文原创性声明学位论文原创性声明 ................................................................................................. 79 学位论文数据集学位论文数据集 ......................................................................................................... 81 万方数据 VII Contents Abstract ...................................................................................................................... III Contents ....................................................................................................................... V List of Figures ............................................................................................................ IX List of Tables ........................................................................................................... XIII List of Variables ........................................................................................................ XV 1 Introduction ............................................................................................................... 1 1.1 Research Significance and Background ................................................................... 1 1.2 Current Research at Home and Abroad ................................................................... 2 1.3 Main Research Contents and s .................................................................... 6 2 Pressure Strength Test of Gangue Backfill ............................................................. 8 2.1 Geometric and Mechanical Properties of Gangue Backfill ..................................... 8 2.2 Test Equipment and s ................................................................................. 11 2.3 Testing Program ....................................................................................................... 9 2.4 Test Results and Analysis ....................................................................................... 10 2.5 The Effect of Particle Size Distribution ................................................................. 10 2.6 The Influence of Material Proportion .................................................................... 23 2.7 Constitutive Model of Lateral Limited Gangue Backfill ....................................... 24 2.8 Summary ................................................................................................................ 28 3 Mechanical Test of Compacted Creep of Gangue Backfill .................................. 29 3.1 Test Equipment and s ................................................................................. 29 3.2 Testing Program ..................................................................................................... 29 3.3 Strain-Time Relationship ....................................................................................... 30 3.4 Porosity-Time Relationship ................................................................................... 33 3.5 Compacted Creep Model of Gangue Backfill ........................................................ 35 3.6 Summary ................................................................................................................ 38 4 Mechanical Model and Analysis of Overburden Movement in Gangue Filling Mining ......................................................................................................................... 40 4.1 Analysis of Overburden Movement Characteristics in Gangue Filling Mining .... 40 4.2 The Applicable Conditions of Mechanical Model of Overburden Movement in 万方数据 VIII Gangue Filling Mining ................................................................................................. 40 4.3 Mechanical Model of Overburden Movement in Gangue Filling Mining ............. 43 4.4 Summary ................................................................................................................ 49 5 Numerical Simulation of Overburden movement and deation in gangue filling mining ............................................................................................................... 51 5.1 Introduction to Numerical Simulation Software .................................................... 51 5.2 Determination of Numerical Simulation Scheme .................................................. 52 5.3 Establishment of Numerical Model ....................................................................... 54 5.4 Analysis of Numerical Simulation Results ............................................................ 55 5.5 Summary ................................................................................................................ 67 6 Con