深部水平巷道群围岩变形机理与支护对策研究矿业工程专业论文.docxVIP

万方数据 万方数据 摘 摘 要 摘 要 本文采用现场地质调查实测、实验室试验、理论分析和数值模拟试验相结合 的研究方法，对朱集西煤矿的一水平西翼11煤水平巷道群地应力分布特征及巷道 布置、巷道群掘进次应力与巷道围岩稳定性、巷道群围岩变形失稳机理与支护方 案优化进行了系统的研究。 通过现场地质资料调查分析、物理力学试验以及现场地应力测试、理论计算 和FLAC3D数值模拟分析，分别得到西翼ll煤水平巷道群围岩变形破坏失稳特征、 巷道群围岩环境基本情况、西翼l l煤水平巷道的最佳布置方位角和巷道群掘进期 间的围岩应力场和位移场的基本情况。 运用FLAC3D建立了模拟西翼1l煤水平巷道群数值模拟模型。分析西翼11 煤巷道群在原支护状态下的围岩的塑性区、应力场和位移场以及在巷道群掘进期 间各巷道间的扰动影响。结果表明：西翼ll煤水平巷道群在开拓过程中，掘进引 起的二次应力场相互叠加，围岩应力集中程度显著增大。在原支护设计的基础上， 研究分析了临近巷道在掘对已掘巷道围岩塑性区和应力场的影响规律，找出巷道 支护承载结构的易失稳破坏的位置，确定了合理补强方案。 基于巷道群围岩变形机理，采用理论计算和工程类比对西翼11煤巷道群中每 条巷道提出相应优化支护方案。对于巷道支护，提出了高强预应力让压锚杆(索) +底板锚杆+全断面注浆和高强预应力让压锚杆(索)+二次支护十全断面注浆的多 层次组合支护方案技术。现场工业性实践表明：采用该优化支护方案后，水平巷 道群围岩变形控制在了合理范围内，可以有效解决西翼ll煤水平巷道群的失稳问 题。 图[49】表[10】参[76】 关键词：深井；水平巷道：掘进扰动；巷道变形；组合支护 分类号：TD32 安徽理工大学硕士 学位论文 -11- AbstractAbstract Abstract Abstract Systematically this paper studied on stress distribution of NO．1 1 coal roadway groups in west wing of Zhujixi coal mine and its influence on the roadway layout and analyzed the roadway excavation stress and its surrounding rock stability by using field geological survey and test，laboratory rock mechanics test，theoretical analysis and numerical simulation,and put forward the distortion and stability of mechanism and the optimization of supporting scheme The deformation characteristics of roadway groups were got from the field geological investigation．The environment of surrounding of roadway groups were obtained from the laboratory test and field test．The roadway layout angle of NO．1 1 coal roadway groups in west wing was get by using the method of combining theoretical analysis and FLAC3D numerical simulation．The theoretical analysis shows that the stress field and displacement field of surrounding rock during excavation of NO．1 1 coal roadway groups in west wing． The large numerical model of NO．1 1 coal roadway groups in west wing was established by FLAC3D．The plastic zone and stress field and displacement field and disturbance effects during roadway excavating between each roadway of mille groups were ana