采煤机截割含断层煤岩截割特性研究.pdf

全日制全日制硕士学位论文硕士学位论文 采煤机截割含断层煤岩截割特性研究 Cutting Characteristics of Coal and Rock with Faults by Shearer 作者姓名邹琬莹 导师姓名张强教授 工程领域机械工程 研究方向机械设计及理论 完成日期2020 年 08 月 11 日 辽宁工程技术大学 Liaoning Technical University 万方数据 论 采 煤 机 截 割 含 断 层 煤 岩 截 割 特 性 研 究 邹 琬 莹 辽 宁 工 程 技 术 大 学 万方数据 关于学位论文使用授权的说明关于学位论文使用授权的说明 本学位论文作者及指导教师完全了解 辽宁工程技术大学辽宁工程技术大学 有关保 留、使用学位论文的规定，同意 辽宁工程技术大学辽宁工程技术大学 保留并向国家有关 部门或机构送交论文的复印件和磁盘，允许论文被查阅和借阅，学校可 以将学位论文的全部或部分内容编入有关数据库进行检索，可以采用影 印、缩印或扫描等复制手段保存、汇编本学位论文。 保密的学位论文在解密后应遵守此协议。 学位论文作者签名导师签名11 2020 年 8 月 15 日2020 年 8 月 15 日 万方数据 中图分类号TD421学校代码101477 UDC621密级公开开 辽宁工程技术大学 全日制全日制硕士学位论文硕士学位论文 采煤机截割含断层煤岩截割特性研究 Cutting Characteristics of Coal and Rock with Faults by Shearer 作者姓名邹琬莹学号4717200666 导师姓名张强 教授副导师姓名教授） 申请学位工学硕士培养单位机械工程学院院 工程领域机械工程研究方向 机械设计及理论1 二○二○年八月 万方数据 致致 谢谢 光阴似箭，时光荏苒，三年的时光很快就接近尾声了。三年前我怀着怎样的遗憾与失 落来到这里早已经不重要了，辽宁工程技术大学见证了我太多的蜕变，承载了我太多的怀 念，然而现在却即将离开。 值此论文完成之际，我想谢谢我的导师张强教授。张强教授用他那高尚无私的人格品 行；细致刻苦的科研态度；求真务实的工作作风时刻鞭策这我努力奋斗，不断向前。张强 教授尊重每位学生的个性，鼓励每位学生学生在科研的道路上永远保持一份真挚，要有创 新并严谨的科学态度。本论文撰写的各个阶段无不凝结着张强教授辛勤的汗水与无私的付 出，在此，我再次向我最尊敬的张强教授表示衷心的谢意和真诚的敬意，感谢您在我读研 期间对我的教育与厚爱 我还要感谢我的父母，感谢爸爸妈妈在我读研期间无条件的支持我做的所有决定，让 我能坚定不移的有勇气有力量去追求自己人生理想。谢谢爸爸妈妈给了我一个温暖和谐的 幸福家庭，让我可以无忧无虑的去闯，面对困难时我知道还有父母在支持我。最终我拿到 了非常心仪的 offer。我希望自己可以一直做让你们骄傲的女儿，在未来的职场道路上， 也会奋力向前。感谢我的男朋友东北大学娄航宇博士对本篇论文的耐心指导，及时的给予 我后备力量，让本篇论文不论是内容还是格式上都得到了升华。 感谢实验室全体师兄师姐师妹师弟，感谢你们在我读研期间给予我的帮助。感谢在我 读研期间给予鼓励的朋友们，很怀念大家一起努力奋斗的日子，不论是专业比赛亦或是课 余活动都是我们研究生生活中浓墨重彩的一笔。 最后我还要向参与答辩和评审的老师专家致以诚挚的谢意，并希望专家提出宝贵的意 见。 万方数据 I 摘摘要要 矿井中的厚及中厚煤层近年来被不断开采，煤炭资源已经匮乏，为开发更丰富的煤炭 资源，现在已经转向之前很少开采的小断层煤岩领域。然而采煤机螺旋滚筒在截割含小断 层煤岩层时的外部载荷会根据煤层倾角的不同有相应的变化。为更明确螺旋滚筒在含小断 层煤岩层下的截割性能，本文以 MG500/1130-WD 采煤机螺旋滚筒为工程研究对象，运用 SolidWorks 建立采煤机螺旋滚筒三维模型，EDEM 离散元软件建立含小断层煤壁模型并 且将螺旋滚筒三维模型导入该离散元软件中，实现采煤机螺旋滚筒截割含断层煤岩的数值 仿真模拟。在不同的煤壁模型下设置不同的牵引速度和截割深度进行仿真模拟，提取仿真 过程中的截割阻力、落煤岩质量以及滚筒转矩随时间变化的趋势，并针对每种工况下前滚 筒和后滚筒在过断层的不同阶段的截割阻力受力、生产率以及截割比能耗情况进行了详细 分析，横向分析获得了每种煤层倾角下牵引速度和截割深度对于前后滚筒过断层时的截割 性能影响，纵向分析得到了煤层倾角对采煤机螺旋滚筒截割性能的影响规律。并用统计学 中方差分析的方法探究牵引速度、截割深度和煤层倾角单因素以及两两交互作用情况下对 于截割性能比能耗的影响程度。 研究表明当煤层倾角相同，螺旋滚筒截割深度相同时，随着牵引速度的增大，螺旋 滚筒受到的截割阻力也随之增大。当煤层倾角相同，牵引速度相同时，随着截割深度增 大，螺旋滚筒受到的截割阻力也随着增大。当牵引速度相同，螺旋滚筒牵引速度相同时， 随着煤层角的增大，螺旋滚筒受到的截割阻力呈现增大的趋势。并通过截割阻力载荷波动 系数探究该类型采煤机较可靠的试验工况。 通过分析发现，随着煤层倾角的升高，采煤机的生产率呈下降趋势。其他条件一定 时，采煤机的牵引速度与截割比能耗大致成幂函数关系。截割比能耗随着牵引速度的增加 而降低，随着截割深度的增加而同步增加，随着煤层倾角的增加而增大。单因素情况下截 割参数对于截割比能耗的影响程度从大到小排列为牵引速度、截割深度和煤层倾角，两两 交互作用时对于截割比能耗影响最大的组合为牵引速度截割深度。本文研究内容为采煤 机螺旋滚筒截割含断层煤岩选择截割参数提供了较优方案，为提高采煤机截割含断层煤岩 的实际情况提供了一定的理论支持。 该论文有图 48 幅，表 14 个，参考文献 65 篇 关键词关键词含断层煤壁；煤层倾角；螺旋滚筒；截割阻力；生产率；截割比能耗 万方数据 II Abstract In recent years, the thick and medium thick coal seams in the mine have been continuously exploited, and the coal resources have been scarce. In order to develop more abundant coal resources, it has turned to the small fault coal rock field which was rarely exploited before. However, the external load of shearer spiral drum in cutting coal with small fault will change according to the different dip angle of coal seam. In order to make clear the cutting perance of spiral drum in coal stratum with small fault, this paper takes MG500 / 1130-wd shearer spiral drum as the engineering research object, uses SolidWorks to establish the three-dimensional model of shearer spiral drum, and edem discrete element software establishes the coal wall model with small fault, and introduces the three-dimensional model of spiral drum into the discrete element software to realize the shearer spiral drum cutting fault Coupling model of coal and rock. Under different coal wall models, different traction speed and cutting depth are set for numerical simulation, and the cutting resistance, coal falling rock quality and drum torque change trend with time are extracted in the simulation process. The cutting resistance force, coal falling rate and cutting specific energy consumption of front drum and rear drum in different stages of fault crossing under each working condition are analyzed in detail The influence of traction speed and cutting depth on the cutting perance of front and rear drums passing through fault is obtained by transverse analysis, and the influence law of coal seam dip angle on cutting perance of shearer spiral drum is obtained through longitudinal analysis. The results show that when the coal seam dip angle is the same, the cutting resistance of spiral drum increases with the increase of traction speed. When the coal seam dip angle is the same and the traction speed is the same, the cutting resistance of spiral drum increases with the increase of cutting depth. When the haulage speed is the same, the cutting resistance of spiral drum increases with the increase of coal seam angle. And through the cutting resistance load fluctuation coefficient to explore the type of shearer more reliable test conditions. Through the analysis, it is found that with the increase of coal seam dip angle, the productivity of shearer shows a downward trend. When other conditions are fixed, the relationship between the haulage speed and the specific energy consumption of the shearer is approximately a power function. The specific energy consumption of cutting decreases with the increase of traction speed, increases synchronously with the increase of cutting depth, and 万方数据 III increases with the increase of coal seam dip angle. And through sensitivity analysis, the influence degree of cutting parameters on cutting specific energy consumption is obtained. The research content of this paper provides a better scheme for coal seam dip angle cutting by shearer spiral drum, and provides certain theoretical support for improving the actual situation of shearer cutting coal and rock with fault. Keywords Fault coal seam; Coal seam dip angel; Spiral drum; Cutting Resistance; Coal falling rate; Cutting specific energy consumption; 万方数据 IV 目录目录 摘摘要要............................................................................................................................................. I I 目录目录............................................................................................................................................... IVIV 图清单图清单....................................................................................................................................... VIIIVIII 表清单表清单........................................................................................................................................... XIXI 变量注释表变量注释表................................................................................................................................. XIIXII 1 1 绪论绪论............................................................................................................................................. 1 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 论文主要研究内容及意义......................................................................................................7 2 2 煤岩截割基础理论煤岩截割基础理论................................................................................................................... 1010 2.1 断层力学效应........................................................................................................................10 2.2 煤岩体物理学特性................................................................................................................13 2.3 螺旋滚筒截割煤岩层受力分析............................................................................................14 2.4 螺旋滚筒截割性能影响因素及评价指标............................................................................21 2.5 本章小结................................................................................................................................23 3 3 螺旋滚筒截割含断层煤岩离散元仿真螺旋滚筒截割含断层煤岩离散元仿真...................................................................................2424 3.1 滚筒结构仿真模型建立........................................................................................................24 3.2 含断层煤岩离散元仿真模型的构建....................................................................................25 3.3 采煤机滚筒截割含断层煤壁模型的实现............................................................................31 3.4 模拟试验方案设计................................................................................................................35 3.5 本章小结................................................................................................................................37 4 4 数值仿真模拟结果分析数值仿真模拟结果分析...........................................................................................................3838 4.1 煤层倾角 30仿真结果统计...............................................................................................39 4.2 煤层倾角 35仿真结果统计...............................................................................................46 4.3 煤层倾角 40仿真结果统计...............................................................................................48 4.4 螺旋滚筒截割阻力分析........................................................................................................51 4.5 本章小结................................................................................................................................54 5 5 截割参数对截割性能评价指标的影响截割参数对截割性能评价指标的影响...................................................................................5555 万方数据 V 5.1 采煤机常用性能衡量指标.....................................................................................................55 5.2 截割参数对生产率的影响.....................................................................................................56 5.3 截割参数对截割比能耗的影响.............................................................................................59 5.4 方差分析.................................................................................................................................62 5.5 本章小结.................................................................................................................................63 6 6 结论与展望结论与展望............................................................................................................................... 6464 6.1 结论........................................................................................................................................64 6.2 展望........................................................................................................................................65 参考文献参考文献....................................................................................................................................... 6666 作者简历作者简历....................................................................................................................................... 7070 学位论文原创性声明学位论文原创性声明................................................................................................................... 7171 学位论文数据集学位论文数据集........................................................................................................................... 7272 万方数据 VI Contents AbstractⅠ ContentsIVIV List of FiguresVIIIVIII List of TablesXIXI List of VariablesXIIXII 1 Introduction1 1.1 Background and significance of topic selection 1 1.2 Research status at home and abroad 2 1.3 The main research content and significance of this paper 7 2 Basic theory of coal and rock cutting 10 2.1 Fault Mechanics Effect 10 2.2 Physical characteristics of coal and rock mass 13 2.3 Force analysis of spiral drum cutting coal seam 14 2.4 Influencing factors and uation inds of cutting perance of spiral drum21 2.5 Summary of this chapter 23 3 Discrete element analysis of cutting fault coal and rock with spiral drum24 3 Es ta bl is hment of drum struct ure sim ulat ion model 24 3.1 Construction of discrete element simulation model for coal and rock with faults25 3.2 Realization of shearer drum cutting coal wall model with fault31 3.3 Design of simulation test scheme35 3.4 Summary of this chapter37 4 Analysis of numerical simulation results38 4.1 Statistics of simulation results of coal seam dip angle of 30 degrees39 4.2 Coal seam dip angle 35 cutting simulation results statistics46 4.3 Statistics of cutting simulation results of coal seam dip angle of 40 degrees48 4.4 Cutting resistance analysis of spiral drum 51 4.5 Summary of this chapter 54 5 The influence of cutting parameters on cutting perance uation index55 万方数据 VII 5.1 Common perance index of Shearer55 5.2 Influence of cutting parameters on productivity56 5.3Influence of cutting parameters on specific energy consumption of cutting59 5.4 Analysis of sensitivity variance62 5.5 Summary of this chapter63 6 Conclusions and Innovative Points64 6.1 Conclusion64 6.2 Expectation65 References66 Author’s Resume70 Declaration of Thesis Originality71 Thesis Data Collection72 万方数据 VIII 图清单图清单 图序号图名称页码 图 1.1论文技术路线9 Figure 1.1Figure1.1 Technology Roadmap9 图 2.1断层要素分布图10 Figure 2.1Distribution of fault elements10 图 2.2采煤机截割含断层煤岩示意图12 Figure 2.2Schematic diagram of shearer cutting fault bearing coal rock12 图 2.3断层力学模型12 Figure 2.3Fault mechanics model12 图 2.4镐型截齿受力简图15 Figure 2.4Single tooth under force15 图 2.5单个截齿锥形面受力分析图16 Figure 2.5Stress analysis diagram of conical surface of single pick16 图 2.6滚筒受力分解图17 Figure 2.6Drum stress breakdown17 图 2.7滚筒装煤方式19 Figure 2.7Loading mode of the drum19 图 2.8叶片与煤体作用力图20 Figure 2.8Force diagram of blade and coal body20 图 2.9三角煤被挤压受力图20 Figure 2.9Stress diagram of triangle coal being squeezed20 图 3.1MG500/1130-WD 采煤机三维模型图24 Figure 3.1The model of MG500/1130-WD type shearer24 图 3.2采煤机螺旋滚筒结构图25 Figure 3.2Shearer drum diagram25 图 3.3本征参数27 Figure 3.3Bulk Material27 图 3.4颗粒参数27 Figure 3.4Particle parameters27 图 3.5煤壁几何体搭建28 Figure 3.5Coal wall geometry construction28 图 3.6岩石颗粒堆积29 Figure 3.6Accumulation of rock particles29 图 3.7mei1 颗粒堆积29 Figure 3.7Accumulation of mei1 particles29 图 3.8煤壁模型30 Figure 3.8The coal model30 万方数据 IX 图 3.9粘结键生成31 Figure 3.9Bonding model31 图 3.10螺旋滚筒与煤壁位置图32 Figure 3.10Location map of spiral drum and coal wall32 图 3.11螺旋滚筒位置图32 Figure 3.11Location map of spiral drum32 图 3.12前滚筒运动参数33 Figure 3.12Motion parameters of front roller33 图 3.13前滚筒旋