常村煤矿高位巷抽采瓦斯技术研究.pdf

全日制硕士学位论文全日制硕士学位论文 常村煤矿高位巷抽采瓦斯技术研究 Research on Gas Extraction Technology in High Lane of Changcun Coal Mine 作者姓名 王祥宇 导师姓名 马 恒 教授 学科专业 安全技术及工程 研究方向 煤矿瓦斯灾害防治理论及技术 完成日期 2019 年 6 月 5 日 辽宁工程技术大学 Liaoning Technical University 万方数据 常 村 煤 矿 高 位 巷 抽 采 瓦 斯 技 术 研 究 王 祥 宇 辽 宁 工 程 技 术 大 学 万方数据 万方数据 中图分类号 TD712 学校代码 10147 UDC 622 密 级 公 开 辽宁工程技术大学 全日制硕士学位论文全日制硕士学位论文 常村煤矿高位巷抽采瓦斯技术研究 Research on Gas Extraction Technology in High Lane of Changcun Coal Mine 作者姓名 王祥宇 学 号 471620387 导师姓名 马 恒（教授） 副导师姓名 无 申请学位 工学硕士 培养单位 安全科学与工程学院 学科专业 安全技术及工程 研究方向 煤矿瓦斯灾害防治理论及技术 二○一九年六月 万方数据 致致 谢谢 时光飞逝，光阴荏苒。转眼间三年的研究生生活即将过去。回首往昔，老师的谆谆教诲仿 佛在耳边回响，师兄弟之间通力合作完成实验的场景仿佛重现于眼前。三年的时光让我收获满 满，在此期间虽然在写论文的过程中我遇到过很多困难，但是通过大量的查阅资料、文献以及 老师的悉心解答、同学之间相互探讨，我逐渐豁然开朗，有信心和实力完成毕业论文，所以在 这里由衷的感谢帮助过我的老师们、同学们感谢你们的培养与陪伴，给了我无微不至的关怀 和照顾，教会我许多为人处事的道理，并帮助我解决了许多学术上和生活中的难题。 首先，我要感谢我的导师马恒教授，他在学习和生活等各方面，给予了我无微不至的关怀 和谆谆教诲，并为我提供了良好的科研环境，使得我的研究生求学阶段得以顺利地完成。每当 在科研路上遇到问题时，他总是耐心的倾入心血和智慧，为我拨云见日。他严谨的治学态度， 开拓创新的精神给予我潜移默化的影响，对我在将来的工作和生活中必然起到领航势的作用。 在此，我向尊敬的导师马恒教授致以崇高的敬意和由衷的感谢 感谢安全科学与工程学院的各位领导和老师， 感谢您们在我研究生学习期间给予的各种指 导与帮助，感谢学院提供的优雅的科研环境和学习条件 感谢课题组的师兄弟， 在我论文研究期间对我的支持与帮助 真诚的感谢乔征龙博士师兄、 王晓琪师弟、郭瑶师妹等同学在我攻读硕士期间给予我的各种无私帮助。 正是他们的帮助使我 的实验能顺利进行，在此表示衷心感谢 感谢我的室友，三年的朝夕相处，让我成长很多，在此向刘翔、梁腾飞、韩宝华表示诚挚 的感谢。 感谢我的家人在我求学期间给予的大力支持和帮助。特别感谢我的父母对我的养育之恩， 愿他们身体健康 感谢前人所做的研究工作，为本论文提供了参考。 感谢在百忙之中审阅论文的专家和教授表示诚挚的谢意，由于本人水平 有限，论文难免 有许多疏漏和不足之处,感谢各位老师对论文的评阅与指教 总之， 三年的研究生生涯培养了我的耐心和细心以及严密的逻辑思维，这对于我以后走上 社会有着至关重要的意义。最后，再次对所有帮助过我的老师、同学、家人以及我的母校辽宁 工程技术大学表示衷心的感谢 万方数据 I 摘摘 要要 在煤矿采空区瓦斯的治理中，高位巷瓦斯抽放是一种能有效治理采空区瓦斯的途径。 在实际生产中，工作面高位巷层位布置的不同，会对采空区瓦斯的治理、采空区氧气浓度 和温度的分布产生不同的影响。因此本文以常村煤矿 S5-13 工作面高位巷为例，对其合理 层位的布置进行研究和确定。 首先， 通过对 S5-13 工作面采空区上覆岩石破坏规律的分析， 计算得到该工作面采空区冒落带的范围为 10.25～14.65m，裂隙带的范围为 39.2～50.4m， 并根据采动“O”型圈理论和高位巷层位理论，大致估算出该工作面高位巷的理论层位。 其次，运用 FLUENT 数值模拟的方法，并加载自定义 UDF，结合采空区瓦斯运移规律和 遗煤氧化升温理论，对采空区瓦斯、采空区氧浓度以及温度在 S5-13 工作面高位巷不同层 位下的分布规律进行数值模拟。通过对模拟结果分析，结合采空区瓦斯分布、氧气浓度和 温度分布规律综合考虑，得到该工作面高位巷布置的最佳层位，并对该层位下高位巷的抽 采流量范围进行了确定。然后，依据数值模拟结果，对 S5-13 工作面高位巷的布置进行实 际应用， 通过实测数据与模拟结果的对比， 说明该工作面高位巷布置在距离煤层底板 23m， 距离回风巷内侧水平 20m 处时，能够较好的控制工作面上隅角瓦斯的浓度，使上隅角瓦斯 浓度维持在 0.49左右， 并且使高位巷抽采浓度达到较高水平， 抽采浓度维持在 7.0左右， 同时对采空区氧浓度分布影响不大，不会对采空区遗煤的自燃产生威胁。论文研究成果， 可为常村煤矿以及邻近矿井中具有类似条件工作面高位巷的层位选择提供相关参数与技 术指导。 该论文有图 53 幅，表 8 个，参考文献 73 篇。 关键词关键词高位巷层位；数值模拟；瓦斯抽采；遗煤氧化 万方数据 II Abstract In the treatment of gas in coal mine goaf, gas drainage in high-level roadway is a way to effectively control gas in goaf. In actual production, the different layout of high-levelroadway of the working face will have different effects on the treatment of gas in the goaf and the distribution of oxygen concentration and temperature in the goaf. Therefore, this paper takes the high-level roadway of S5-13 working face in Changcun Coal Mine as an example, and studies and determines the layout of its reasonable horizon. Firstly, by analyzing the failure law of overlying rock in the goaf of S5-13 working face, the range of the falling zone of the working face is calculated to be 10.2514.65m, and the range of the crack zone is 39.250.4m. According to the theory of mining “O” ring and the theory of high-level roadway, the theoretical horizon of the high-level roadway of the working face is roughly estimated. Secondly, using the FLUENT numerical simulation and loading the custom UDF, combined with the gas migration law in the goaf and the oxidation temperature rise theory of the coal, the numerical simulation of the gas, oxygen concentration and temperature distributionin the goafon different level of high-levelroadwayof S5-13 working face is carried out. Through the analysis of the simulation results, combined with the gas distribution, oxygen concentration and temperature distribution in the goaf, the optimal horizon of the high-level roadway layout of the working face is obtained, and the drainage flow range of the high-level roadway under the horizon is determined. Then, based on the numerical simulation results, the actual application of the layout of the high-level roadwayof S5-13 working face is applied. The comparison between the measured data and the simulation results shows that the high-level roadway of the working face is arranged at a distance of 23m from the coal floor and 20m from the inner side of the return airway. At the time, the concentration of the gas at the corner of the working surface can be well controlled, the gas concentration of the upper corner is maintained at about 0.49, and the concentration of the high-level roadway is at a high level, and the concentration of the extraction is maintained at about 7.0. At the same time, it has little effect on the oxygen concentration distribution in the goaf, and will not pose a threat to the spontaneous combustion of the coal in the goaf. The research results of this paper can provide relevant parameters and technical guidance of the selection of high-level roadway of the working facein Changcun Coal Mine and adjacent mines with similar conditions. There are 54 figures, 8 tables and 73 references in this paper. Key wordsHigh lane level; Numerical simulation; Gas drainage;Residual coal oxidation 万方数据 III 目录目录 摘要摘要 ................................................................................................................................................. I 目录目录 .............................................................................................................................................. III 图清单图清单 ......................................................................................................................................... VII 表清单表清单 ............................................................................................................................................ X 变量注释表变量注释表 .................................................................................................................................. XI 1 绪论绪论 ............................................................................................................................................. 1 1.1 选题背景及意义 ...................................................................................................................... 1 1.2 国内外研究现状 ...................................................................................................................... 1 1.3 研究内容及技术路线 .............................................................................................................. 3 2 工作面高位巷理论层位分析工作面高位巷理论层位分析 ..................................................................................................... 5 2.1 采空区覆岩破坏理论 .............................................................................................................. 5 2.2 采空区多孔介质理论 .............................................................................................................. 8 2.3 高位巷空间层位分析 ............................................................................................................ 11 2.4 本章小结 ................................................................................................................................ 13 3 采空区相关理论采空区相关理论 ....................................................................................................................... 14 3.1 常村煤矿概况 ........................................................................................................................ 14 3.2 工作面瓦斯涌出分析 ............................................................................................................ 14 3.3 采空区瓦斯运移规律 ............................................................................................................ 17 3.4 采空区遗煤氧化理论 ............................................................................................................ 18 3.5 采空区温度场的形成 ............................................................................................................ 19 3.6 本章小结 ................................................................................................................................ 19 4 S5-13 工作面高位巷层位数值模拟工作面高位巷层位数值模拟 ......................................................................................... 21 4.1 FLUENT 软件介绍及功能 ..................................................................................................... 21 4.2 工作面高位巷层位三维模型的建立 .................................................................................... 21 4.3 物理模型的建立及网格划分 ................................................................................................ 24 4.4 模型主要参数及设置 ............................................................................................................ 26 4.5 不同层位高位巷的数值模拟 ................................................................................................ 29 4.6 高位巷合理层位流量的确定 ................................................................................................ 45 4.7 本章小结 ................................................................................................................................ 46 万方数据 IV 5 S5-13 工作面高位巷工程应用工作面高位巷工程应用 ................................................................................................. 47 5.1 S5-13 工作面布置 .................................................................................................................. 47 5.2 实测与模拟结果对比 ............................................................................................................ 49 5.3 本章小结 ................................................................................................................................ 50 6 结论与展望结论与展望 ............................................................................................................................... 52 6.1 结论 ........................................................................................................................................ 52 6.2 展望 ........................................................................................................................................ 52 参考文献参考文献 ..................................................................................................................................... 53 作者简历作者简历 ..................................................................................................................................... 57 学位论文原创性声明学位论文原创性声明 ................................................................................................................ 58 学位论文数据集学位论文数据集 ........................................................................................................................... 59 万方数据 V Contents Abstract .......................................................................................................................................... I Contents ....................................................................................................................................... IV List of Figures .......................................................................................................................... VIII List of Tables ............................................................................................................................... XI List of Variables ......................................................................................................................... XII 1 Introduction ................................................................................................................................ 1 1.1 Background and Significance of the Topic ............................................................................... 1 1.2 Research Status at Home and Abroad ....................................................................................... 1 1.3 Content and Technical Route of Research ................................................................................ 3 2 Theoretical Horizon Analysis of High Working Roadway ..................................................... 5 2.1 Overburden Failure Theory in Goaf .......................................................................................... 5 2.2 The Theory of Porous Media in Goafs ...................................................................................... 8 2.3 High-level Lane Spatial Horizon Analysis .............................................................................. 11 2.3 Brief Summary ........................................................................................................................ 13 3 Gob Area Related Theory ........................................................................................................ 14 3.1 Overview of Changcun Coal Mine .......................................................................................... 14 3.2 Working Face Gas EmissionAnalysis ..................................................................................... 14 3.3 Gas Migration Law in Goaf .................................................................................................... 17 3.4 Ore Oxidation Theory in Goaf ................................................................................................ 18 3.5 ation of the Temperature Field in the Goaf ..................................................................... 19 3.6 Brief Summary ........................................................................................................................ 20 4 Numerical Simulation of Layer Level of High Lane in S5-13 Working Face ..................... 21 4.1 FLUENT Software Introduction and Function ....................................................................... 21 4.2 Establishment of Three-dimensional Model of High Level Roadway in Working Face ........ 21 4.3 Working face Goaf Physical Model and Meshing................................................................... 24 4.4 Main Parameters and Settings of the Model ........................................................................... 26 4.5 Numerical Simulation of High Level Roadway with Different Horizons............................... 29 4.6 Determination of Reasonable Horizon Flow in High Roadway ............................................. 45 4.7 Brief Summary ........................................................................................................................ 46 万方数据 VI 5 Application of S5-13 Working Face High Roadway Engineering ........................................ 47 5.1 S5-13 Work Surface Layout .................................................................................................... 47 5.2 Comparison of Measured and Simulated Results ................................................................... 49 5.3 Brief Summary .........................