五阳矿高应力煤巷围岩钻孔卸压技术研究.pdf

硕士学位论文 五阳矿高应力煤巷围岩钻孔卸压技术研究 Study on Drillhole Pressure Relief Technology for Surrounding Rock of High Stress Coal Roadway in Wuyang Coal Mine 作者苏赛 导师徐金海 教授 中国矿业大学 二〇一八年五月 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TD322学校代码10290 UDC622密级公开 中国矿业大学 硕士学位论文 五阳矿高应力煤巷围岩钻孔卸压技术研究 Study on Drillhole Pressure Relief Technology for Surrounding Rock of High Stress Coal Roadway in Wuyang Coal Mine 作者苏 赛导师徐金海 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 岩体力学及岩层控制 答辩委员会主席曹胜根评 阅 人匿名评阅 二O一八年五月 万方数据 致谢 本论文是在导师徐金海教授的悉心指导下顺利完成， 从论文选题、 思路完善、 结构调整、调研、数据收集上都在徐老师的悉心指导与不断教诲下完成。没有导 师的指导、鼓励、监督与检查的支持，论文不可能得以顺利完成。此外，在论文 框架的构建以及最后的文理疏通、审阅定稿等每一步工作中，徐老师也都倾注了 大量的心血和智慧。求学期间，在导师的教诲和指导下，不但学到了丰富的专业 知识，而且其渊博的学识、严谨求实的治学态度、活跃的学术思想，将使学生永 远受益。值此论文完成之际，再次向徐老师致以崇高的敬意和衷心的感谢 研究生学习和生活期间，得到李冲副教授何清源副研究员这些年来的支持、 帮助与信任.感谢课题组b322的兄弟们每次跟你们沟通都会让我更清醒的意识到 自己所处的大环境,保持好的心态更重要。在此特向曹悦、刘鼎、陈梁博士和张 兵兵、陈秋宇、张根柱、常志强、徐森茂、李欢恒、陶鑫等硕士表示深深的感谢。 衷心感谢矿业工程学院老师们三年来在学习和生活上给予的关心、 鼓励和帮 助。在工程实践中，感谢五阳矿领导对工作的大力支持与帮助。 论文撰写过程中参阅了大量的文献， 在此对这些专家、 前辈致以深深的感谢。 感谢各位专家在百忙之中抽出时间评审本论文， 衷心希望能够得到您的指导 和帮助。 同时也感谢所有关心、 鼓励和帮助我的朋友、 亲人们， 谢谢你们的一路陪伴。 万方数据 I 摘摘要要 煤炭资源的日益开采，煤炭开采难度增大，特别是高应力煤巷，巷道围岩难 以控制，支护难度大，支护方式与支护参数设计不合理，造成支护强度不足或过 剩，对巷道掘进及矿井生产造成很大影响。本论文以五阳煤矿 7609 运输巷为工 程背景，综合运用现场调研及资料分析、理论分析、数值模拟分析和现场实测等 相结合的研究方法对高应力煤层巷道围岩钻孔卸压技术进行系统研究， 主要取得 以下成果 （1）分析了五阳煤矿 7609 运输巷矿井概况。7609 运输巷属于高应力煤层 巷道，易受动压影响，通过 7609 运输巷支护方案分析，总结支护参数选择不合 理以及动压巷道支护中存在的问题。 （2）确定了地应力的分布规律。运用套筒致裂地应力测试方法，进行了 3 煤层地应力测试与分析，根据地应力和岩性试验测试结果，给出了 3煤层运输 巷设计建议。 （3）研究高应力煤巷围岩应力分布及变形规律，采用 FLAC3D数值模拟的 方法，分析不同动压系数对高应力煤巷围岩应力分布规律、塑性区分布规律及变 形规律的影响。 （4）分析了高应力卸压钻孔原理，得出了平面应变问题下巷道围岩弹塑性 应力与位移分布规律，并给出了卸压钻孔参数确定的理论依据。 （5）通过 FLAC3D数值模拟分析，分别分析了钻孔卸压长度、直径和间排 距对高应力煤层巷道掘进面超前支承压力、 帮部巷道围岩应力与变形和巷道锚杆 受力影响规律。 （6）将以上研究成果在五阳煤矿 7609 运输巷进行工业性试验，结果表明 采用高应力煤巷围岩钻孔卸压技术，能够将巷道应力峰值向深部转移，有效的控 制了围岩的变形，保证了 7609 运输巷的安全稳定。 本论文有图 74 幅，表 29 个，参考文献 82 篇。 关键词关键词高应力煤巷；钻孔卸压；围岩控制；数值模拟 万方数据 II Abstract With the increasing exploitation of coal resources,shallow coal seams and mines having simple geological conditions are gradually disappearing,the difficulty of mining is increasing.Especially high - stress coal roadway,roadway surrounding rock is difficult to control,the roadway support is difficult,and the supporting s and supporting parameters are not designed properly.Insufficient or excessive support intensity have a great impact on roadway excavation and mine production,even affect the personal safety of mine workers.The 7609 transportation roadway of Wuyang coal mine as the engineering background,and comprehensively used the combined research soffieldinvestigationanddataanalysis,numericalsimulation analysis,theoretical analysis and field measurement to relieve drilling pressure and control surrounding rock in high-stress coal seam roadway.The following results were mainly achieved 1Analyzing the general situation of 7609 transport roadway in Wuyang coal mine,which belongs to the roadway of high stress coal seam and is susceptible to the influence of dynamic pressure,analyzes the support scheme of 7709 transportation roadway,summarizes the unreasonable selection of supporting parameters and the problems existing in the support of dynamic pressure roadway. 2The basic concept and distribution law of geostress are obtained by analyzing the principle of geostress;Based on the principle and of ground stress test of sleeve fracturing ,3 coal seam floor stress test and analysis were carried out.According to the results of lithology test and ground stress test,the design suggestion of roadway support of 3 coal seam. 3The stress distribution and deation of surrounding rock of high stress coal roadway are studied.The influence of dynamic pressure coefficient on stress distribution,plastic zone distribution and deation law of surrounding rock of high stress coal roadway is analyzed by FLAC3D numerical simulation . 4According to the study of the principle of high stress relief drilling,the elasto-plastic analytical solution of stress and displacement of roadway surrounding rock under the plane strain model was revised.To control the volume expansion of roadway surrounding rock,the theoretical basis for the determination of pressure drilling parameters was preliminarily given . 5Based on the numerical simulation of FLAC3D,the influences of the length of 万方数据 III borehole pressure relief,diameter and spacing on the leading bearing pressure of roadway driving face,the stress and deation of surrounding rock and the stress of bolt in roadway of high stress coal seam are analyzed respectively. 6Based on the above research results,the designed borehole pressure relief technology of 7609 transport roadway in Wuyang coal mine is tested.The results of numerical simulation of stress distribution of surrounding rock,plastic zone and deation monitoring of roadway surrounding rock show that,By using the technique of borehole pressure relief of surrounding rock in high stress coal roadway, the peak stress of roadway can be transferred to the deep, which can effectively control the deation of surrounding rock and ensure the safety and stability of 7609 transportation roadway. There are 74 pictures, 29 tables and 82 references in this paper. Keywordshighstresscoalroadway;boreholedestressing;surroundingrock control;numerical simulation 万方数据 IV 目目录录 摘摘要要............................................................................................................................ I 目目录录..........................................................................................................................IV 图清单图清单...................................................................................................................... VIII 表清单表清单.......................................................................................................................XIV 变量注释表变量注释表...............................................................................................................XVI 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 研究内容与目标.....................................................................................................5 2 高应力煤巷地应力测试分析高应力煤巷地应力测试分析....................................................................................8 2.1 工程概况.................................................................................................................8 2.2 地应力测试原理分析...........................................................................................14 2.3 7609 运输巷地应力测试分析...............................................................................14 2.4 7609 运输巷围岩控制建议...................................................................................22 2.5 本章小结...............................................................................................................22 3 高应力煤巷围岩应力分布及变形规律高应力煤巷围岩应力分布及变形规律分析分析..........................................................24 3.1 高应力煤巷围岩应力分布规律理论分析...........................................................24 3.2 高应力煤巷围岩应力分布及变形数值模拟分析...............................................25 3.3 本章小结...............................................................................................................33 4 高应力煤巷围岩钻孔卸压原理分析高应力煤巷围岩钻孔卸压原理分析......................................................................34 4.1 高应力煤巷围岩钻孔卸压原理...........................................................................34 4.2 卸压钻孔参数确定依据.......................................................................................34 4.3 本章小结...............................................................................................................41 5 高应力煤巷围岩钻孔卸压参数优化设计高应力煤巷围岩钻孔卸压参数优化设计..............................................................42 5.1 钻孔卸压影响参数确定.......................................................................................42 5.2 钻孔长度优化设计...............................................................................................42 5.3 钻孔直径参数优化分析.......................................................................................48 5.4 钻孔间排距参数优化分析...................................................................................54 万方数据 V 5.5 钻孔卸压对高应力煤巷锚杆受力影响规律分析...............................................59 5.6 本章小结...............................................................................................................63 6 7609 运输巷钻孔卸压优化设计与工业性试验运输巷钻孔卸压优化设计与工业性试验......................................................65 6.1 巷道支护方案与参数............................................................................................65 6.2 钻孔卸压方案及参数...........................................................................................67 6.3. 数值模型的建立与分析......................................................................................68 6.4 钻孔卸压质量监测与评价...................................................................................72 6.5 本章小结...............................................................................................................75 7 主要结论主要结论..................................................................................................................76 参考文献参考文献......................................................................................................................78 作者简历作者简历......................................................................................................................83 学位论文原创性声明学位论文原创性声明..................................................................................................84 学位论文数据集学位论文数据集..........................................................................................................85 万方数据 VI Contents Abstract........................................................................................................................II Contents......................................................................................................................VI List of Figures..........................................................................................................VIII List of Tables............................................................................................................XIV List of Variables.......................................................................................................XVI 1 Introduction............................................................................................................... 1 1.1 Research Significance and Background...................................................................1 1.2 Research Status at Home and Abroad...................................................................... 2 1.3 Research Contents and Objectives...........................................................................5 2Analysis of Surrounding Rock Deation Law of High Stress Coal Roadway8 2.1 Engineering Survey..................................................................................................8 2.2Analysis of In-situ Stress Principle........................................................................ 14 2.3 Measurement and Analysis of Ground Stress in 7609 Transportation Roadway...14 2.4 Suggestions on Surrounding Rock Control of 7609 Transport Roadway..............22 2.5 Brief Summary.......................................................................................................22 3.Study on Stress Distribution and Deation of Surrounding Rock in High Stress Coal Roadway..................................................................................................24 3.1 Theoretical Analysis on Stress Distribution of Surrounding Rock in High Stress Coal Roadway.............................................................................................................. 24 3.2 Study on Stress Distribution and Deation of Surrounding Rock in High Stress Coal Roadway.............................................................................................................. 25 3.3 Brief Summary.......................................................................................................33 4 Analysis of Pressure Relief Principle for Surrounding Rock of High Stress Coal Roadway......................................................................................................................34 4.1 Principle of Borehole Pressure Relief for Surrounding Rock of High Stress Coal Roadway.......................................................................................................................34 4.2 Basis for Determining Parameters of Pressure Relief Drilling ............................ 34 4.3 Brief Summary.......................................................................................................41 5 Optimization Design of Pressure Relief Parameters for Surrounding Rock of High Stress Coal Roadway........................................................................................ 42 万方数据 VII 5.1 Determination of Influence Parameters of Borehole Pressure Relief.................... 42 5.2 Drilling Length Optimization Design.....................................................................42 5.3 OptimizationAnalysis of Hole Diameter Parameters............................................ 48 5.4 OptimizationAnalysis of Parameters of Spacing Between Boreholes...................54 5.5 Analysis of Influence of Pressure Relief Drilling on Bolt Force of Roadway in High Stress Coal Seam.................................................................................................59 5.6 Brief Summary.......................................................................................................63 6 Optimum Design and Industrial Test of Borehole Pressure Relief in 7609 Transportation Roadway...........................................................................................65 6.1Roadway Support Schemes and Parameters............................................................65 6.2 Borehole Pressure Relief Scheme and Parameters.................................................67 6.3. Establishment and Analysis of Numerical Model.................................................68 6.4 Quality Monitoring and uation of Borehole Pressure Unloading...................72 6.5 Brief Summary.......................................................................................................75 7 Main Conclusions.....................................................................................