综采工作面推进速率与矿压显现关系的研究.pdf

I 硕士学位论文 综采工作面推进速率与矿压显现 关系的研究 Study on the Relationship between the Advanc ing Speed and Strata Behaviors of Fully-mech anized Working Face 作者裴 松 导师万志军 教授 中国矿业大学 二〇一五年五月 国家高技术研究发展计划（863 计划） （2012AA062101）资助 江苏高校优势学科建设工程项目（SZBF2011-6-B35）资助 万方数据 III 中图分类号 TD32 学校代码 10290 UDC 622 密 级 公开 中国矿业大学 硕士学位论文 综采工作面推进速率与矿压显现 关系的研究 Study on the Relationship between the Advancing Speed and Strata Behaviors of Fully-mechanized Working Face 作 者 裴 松 导 师 万志军 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 矿山压力与岩层控制 答辩委员会主席方新秋 评 阅 人 盲 审 二〇一五年五月 万方数据 II 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 IV 论文审阅认定书论文审阅认定书 研究生裴松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 V 致谢致谢 论文得到了国家高技术研究发展计划 863 项目（2012AA062100） 、江苏高校 优势学科建设工程项目（SZBF2011-6-B35）等项目的资助，特致真挚谢意。 尤记得本科三年，未解科研时，得遇恩师，执手入门，乃知此路别有洞天。 我的恩师万志军教授是一名儒雅的绅士，是一名千方百计为学生着想、不计个人 名利、扎根讲台深处的普通却又不平凡的人民教师。五年的时间里，恩师在我的 生活上、学业上、职业选择和发展上都倾注了大量的心血、给予了无微不至的关 心。恩师对我的指导和影响之大，怎样言说都表达不尽。恩师严谨勤奋的治学风 格、扎实的学术功底，都深深地感染和影响着我现在和日后的学习和生活，在此 对我的恩师献上最崇高的敬意 感谢矿业工程学院、国际学院的领导和老师对我的培养。特别感谢在我七年 的大学生活中研工部张利先部长、国际学院张庆春副院长、矿业学院畅军亮副书 记、殷实老师、我的辅导员朱磊老师、吴锋锋老师、倪涛涛老师先后给予我的帮 助和指导，我将在以后的工作中时刻铭记你们的教导，立志做一名无愧于心、受 人尊敬的大学老师 感谢矿业工程学院马文顶高工在相似模拟实验方面给予的指导， 感谢课题组 师兄张源老师、程敬义博士、周长冰博士在论文撰写过程中给予的帮助，感谢课 题组师弟周鹏硕士、刘泗斐博士、王志民硕士、张健硕士、马朝阳硕士、郑磊硕 士、董博硕士、王涛硕士、刘博硕士、时洪浩硕士、李同欢硕士、毕世科硕士等 在实验方面付出的辛勤劳动， 感谢杨伙盘矿的有关领导和人员在现场实测方面给 予的帮助。 感谢本文参考文献的各位作者，你们的研究成果给了我很大的启发和帮助。 值此论文完成之际，感谢我的父母二十多年了对我含辛茹苦的培养，感谢未 婚妻张婷近五年的相伴相随，感谢所有亲人对我的关心和爱护。 最后衷心感谢在百忙之中评阅论文和参加答辩的各位专家和老师 裴 松 2015 年 5 月 万方数据 VI 摘要摘要 经过多年的发展，我国煤矿综采比例有很大增长，合理的综采工作面推进速 率是实现矿井安全、高效生产的关键，工作面推进速率与矿压显现之间关系的相 关理论有待进一步开展研究。论文综合采用了理论分析、数值模拟、相似实验和 现场观测的研究方法和手段，总结了影响工作面推进速率的主要影响因素，对工 作面不同推进速率下的塑性区、应力场、位移场进行了数值模拟研究，对工作面 不同推进速率的影响下上覆岩层垮落、 位移特征以及工作面前方煤体应力分布规 律进行了相似实验研究，并进一步通过现场实测进行了验证，主要得到了以下结 论 1）总结了影响工作面推进速率的主要影响因素。通过层次分析法计算，自 燃发火、瓦斯排放、采煤机性能、刮板输送机性能、矿山压力显现和顶板活动的 影响权重分别为 0.11、0.17、0.10、0.10、0.26 和 0.24，可见矿山压力显现对杨 伙盘矿 20105 综采工作面推进速率的影响权重是最大的。 2）模拟研究了工作面不同推进速率下的塑性区、应力场、位移场。随着工 作面推进速率的加快，工作面前方的垂直应力不断向煤壁靠近，且应力集中系数 增大，应力降低区域减小；工作面前方煤体的塑性破坏区范围随着工作面推进速 率的降低而不断向深部扩展，推进速率过慢，煤壁的水平位移变大，加快推进速 率对防止工作面片帮、控顶都有积极作用。 3）实验研究了工作面不同推进速率的影响下上覆岩层垮落、位移特征以及 工作面前方煤体应力分布规律。工作面推进速率加快，对周期来压步距影响相对 较小，对来压影响范围影响较大，支承压力的峰值会增大且会更接近工作面，工 作面上方的高应力区范围增加，导致工作面发生顶板突发性垮落的概率增大，过 高的弹性能聚集可能诱发岩爆等动力灾害的产生。 4）完成了杨伙盘矿 20105 综采工作面的现场实测分析。得到了工作面不同 推进速率下支架工作阻力曲线，发现工作面速度加快后，对周期来压步距影响较 小，但是对来压持续长度影响较大，进一步验证了前文实验研究成果。工作面顶 板周期来压时，顶板断裂、地表塌陷，顶板里的赋存水会全部侵入到工作面。来 压时工作面要组织快速推进，避免长时间停留。 该论文有图 27 幅，表 12 个，参考文献 50 篇，其中外文 10 篇。 关键词关键词综采工作面；推进速率；数值模拟；相似实验；矿压显现 万方数据 VII AbstractAbstract With the rapid development of coal mining industry, the proportion of fully mechanized coal mining in China has increased significantly. Keeping reasonable retreating speed is a key factor in realizing safety and high-efficiency of mining process. However, the relationship between working face advancing speed and strata behavior is still needed to be analyzed. In this paper, numerical modeling, physical experiments and field data on strata pressure analysis are combined to further analyze the relationship between the retreating speed and strata pressure, specifically, numerical simulation was adopted to analyze the plastic zone, stress field, displacement field of the working face, Similarity simulation experiments were applied to study the stress distribution of coal seam in overburden strata caving, and displacement features of coal body in front of working face. Besides, the field measurement was carried out to verify the results. Results show that 1 The main factors affecting the working face advancing speed were summarized. Through the calculation of analytic hierarchy process AHP, the factors ,including, Spontaneous combustion, gas emissions, coal mining machine perance, scraper conveyor perance, mine pressure and roof activities were rated 0.11、 0.17、 0.10、 0.10、 0.26 and 0.24, which indicates that strata behavior is the most significant factor in influencing the advancing speed of 20105 fully mechanized mining face. 2 The plastic zone, stress field, displacement field of the mining face with different advancing speeds was analyzed through numerical simulation. With the acceleration of working face advancing speed, vertical stress moves closer to the coal wall as the retreating speed increases, the stress concentration factor increases while the stress decreasing zone decreases. With the decrease of working face advancing speed, the plastic damage area extends to the deep part of coal body. Low advancing speed will result in larger horizontal displacement. Accelerating the advancing speed is beneficial to prevent the rib spalling and roof controlling. 3 Similarity simulation experiments were conducted to analyze the stress distribution of coal seam in front of the working face and displacement characters of overlying strata caving. The results show that With the increase of advancing speed of the working face, the periodic weighting length will increase slightly, but the periodic pressure duration length increases obviously, meanwhile the peak value of 万方数据 VIII bearing pressure will increase, the peak value position will be much more close to the working face, the high pressure area above the working face will enlarge, leading to the increase of sudden caving probability, in the actual production, the exorbitant gathering elastic energy is likely to induce the underground rock burst ,and some other disasters. 4 This paper completed the field data analysis of the 20105 fully mechanized working face of Yanghuopan mine. Bracket working resistance curve of the working face with different advancing speed was drawn. The results show that accelerating the speed of working face possess little effect on the periodic roof weighting pace, but will increase the increase the pressure duration length, which further verifies the above experimental results. During the working face periodic roof pressure, the geological disasters, such as, roof fracture, surface subsidence and water storage roof intruding into the working face will happen. Thus the working face advancing speed should be organized in a relatively high speed to avoid long time stay. There are 27 figures, 12 tables and 50 references, including 10 foreign articles in the paper. Key words Key words fully-mechanized working face; advancing speed; numerical simulation; the similar experiment; mining pressure manifestation 万方数据 IX 目录目录 摘要摘要 ................................................................................................................................................................................................................................................ VIVI 目录目录 ................................................................................................................................................................................................................................................ IXIX 图清单图清单 .................................................................................................................................................................................................................................... XIIIXIII 表清单表清单 ...................................................................................................................................................................................................................................... XVXV 变量注释表变量注释表 .................................................................................................................................................................................................................... XVIXVI 1 1 绪论绪论 ................................................................................................................................................................................................................................................1 1 1.1 选题背景及意义 ..................................................................................................... 1 1.2 国内外研究现状 ..................................................................................................... 2 1.3 研究内容及方法 ................................................................................................... 4 2 2 工作面推进速率影响因素分析工作面推进速率影响因素分析 ..........................................................................................................................................................6 6 2.1 20105 综采工作面概况 ........................................................................................... 6 2.2 工作面推进速率影响因素分析 ............................................................................. 6 2.3 本章小结 ............................................................................................................... 12 3 3 工作面推进速率与矿压显现关系的数值模拟研究工作面推进速率与矿压显现关系的数值模拟研究 ........................................................................................ 1313 3.1 FLAC3D软件简介 ................................................................................................. 13 3.2 模拟方案设计 ....................................................................................................... 13 3.3 数值模拟结果分析 ............................................................................................... 16 3.4 本章小结 ............................................................................................................... 23 4 4 推进速率对工作面矿压规律显现影响的实验研究推进速率对工作面矿压规律显现影响的实验研究 ........................................................................................ 2424 4.1 实验目的 ............................................................................................................... 24 4.2 相似模拟实验原理 ............................................................................................... 24 4.3 相似模拟实验设计 ............................................................................................... 27 4.4 实验结果分析 ....................................................................................................... 31 4.5 本章小结 ............................................................................................................... 47 5 5 2010520105 综采面矿压显现规律现场实测及分析综采面矿压显现规律现场实测及分析 .......................................................................................................... 4848 5.1 概述 ....................................................................................................................... 48 5.2 现场实测及分析 ................................................................................................... 48 5.3 本章小结 ............................................................................................................... 51 万方数据 X 6 6 主要结论主要结论 .......................................................................................................................................................................................................................... 5252 参考文献参考文献 .................................................................................................................................................................................................................................. 5353 作者简历作者简历 .................................................................................................................................................................................................................................. 5656 学位论文原创性声明学位论文原创性声明 ............................................................................................................................................................................................ 5757 学位论文数据集学位论文数据集 ............................................................................................................................................................................................................ 5858 万方数据 XI ContentsContents AbstractAbstract .................................................................................................................................................................................................................................... VIIVII ContentsContents .................................................................................................................................................................................................................................... XIXI List of FiguresList of Figures .............................................................................................................................................................................................................. XIIIXIII List of TaList of Tablesbles .................................................................................................................................................................................................................... XVXV List of VariablesList of Variables ........................................................................................................................................................................................................ XVIXVI 1 Introduction1 Introduction ..........................................................................................................................................................................................................................1 1 1.1 Statement of the Problems ....................................................................................... 1 1.2 Literature Review ..................................................................................................... 2 1.3 Research Contents and ologies .................................................................... 4 2 2 Analysis of Impacting Factor on the Advancing Speed of Working FaceAnalysis of Impacting Factor on the Advancing Speed of Working Face ....................................6 6 2.1 Profile of 20105 Mechanized Mining Face ............................................................. 6 2.2 Analysis of Impacting Factor ................................................................................... 6 2.3 Brief Summary ....................................................................................................... 12 3 3 Numerical Simulation of the Movement and Pressure Characteristics of with Numerical Simulation of the Movement and Pressure Characteristics of with Dif