深井高应力硬岩巷道围岩变形破坏规律与长期稳定性研究
发布时间：2018-10-05 12:46
【摘要】：根据我国能源战略行动计划和相关研究,在未来的一个相当长的时期内,我国仍将是以煤为主的能源结构。在我国已探明的煤炭资源中,约有2.95×1012t埋深在1000m以下,占我国煤炭资源总量的53%[1]。在深部地下工程中,蠕变是煤岩体工程围岩失稳的重要原因之一,近年来越来越多的大埋深高地应力的硬岩巷道出现了因蠕变导致的巷道围岩变形破坏事件。因此,对深井高应力硬岩巷道围岩蠕变特征以及长期稳定性等问题的研究显得尤为重要和迫切。本文结合郓城煤矿一采区轨道大巷的地质条件,采用理论分析、数值模拟及现场监测等方法,对深井高应力硬岩巷道围岩变形规律、力学特性、变形破坏机理和长期稳定性控制方法等问题进行了分析研究。通过现场实测分析,巷道表面围岩位移量呈指数函数增长,巷道顶板和两帮是围岩稳定性控制的重点。运用粘弹性力学理论对深井高应力硬岩巷道围岩力学特征进行分析,得出巷道围岩任一点变形位移和变形速率公式。运用Flac3D数值模拟软件对巷道开挖后的应力场、位移场和塑性破坏区进行分析研究,确定深井高应力硬岩巷道围岩的变形破坏特征。将影响深井高应力硬岩巷道围岩稳定性的因素概括为自然因素和人为可控因素,其中人为可控因素主要包括:支护方式、支护材料的参数等。而支护参数包括:锚杆(索)的长度、直径、间排距、预紧力等。使用正交试验方法对支护参数各水平之间的匹配进行方案筛选,之后运用Flac3D数值模拟软件对各方案进行模拟。选取顶底板移近量AX和两帮移近量△Y为评价不同方案支护效果的指标,分析模拟结果,从中选取最佳的支护方案。采用经过分析和模拟得到的锚网索支护的最佳参数在郓城煤矿一采区轨道大巷进行现场实践,试验结果表明采用优化后的最佳支护参数能够有效控制深井硬岩巷道在高地应力作用下的围岩变形破坏情况。满足了有效控制围岩和巷道服务年限的需要,为今后类似地质条件下深井高应力硬巷道的支护,提供了重要的参考价值。
[Abstract]:According to our country's energy strategy action plan and related research, in a long period in the future, our country will still be based on coal energy structure. Among the proven coal resources in China, 2.95 脳 1012t buried depth is below 1000m, accounting for 53% of the total coal resources in China. In deep underground engineering, creep is one of the important reasons for the instability of surrounding rock in coal and rock mass engineering. In recent years, more and more hard rock roadways with large buried depth and high ground stress appear deformation and failure events of surrounding rock caused by creep. Therefore, it is very important and urgent to study the creep characteristics and long-term stability of roadway with high stress in deep well. Combined with the geological conditions of the track roadway in Yuncheng Coal Mine, the deformation law and mechanical properties of the surrounding rock of the roadway with high stress in deep well and high stress are studied by using the methods of theoretical analysis, numerical simulation and field monitoring. The deformation failure mechanism and long-term stability control methods are analyzed and studied. Through the field measurement and analysis, the displacement of surrounding rock on the surface of roadway increases with exponential function, and the roof and two sides of roadway are the key points of the stability control of surrounding rock. Based on the viscoelastic theory, the mechanical characteristics of surrounding rock of roadway with high stress and high stress in deep well are analyzed, and the formulas of deformation displacement and deformation rate at any point in surrounding rock of roadway are obtained. The stress field, displacement field and plastic failure zone of roadway after excavation are analyzed and studied by using Flac3D numerical simulation software, and the deformation and failure characteristics of surrounding rock of roadway with high stress in deep well are determined. The factors affecting the surrounding rock stability of roadway with high stress in deep well are summarized as natural factor and artificial controllable factor, among which artificial controllable factors mainly include: supporting way, parameters of supporting material and so on. The supporting parameters include the length, diameter, spacing, pretension and so on of anchor rod (cable). The orthogonal test method is used to screen the schemes for matching the support parameters between different levels, and then the Flac3D numerical simulation software is used to simulate the schemes. AX and Y are selected as indexes to evaluate the support effect of different schemes. The simulation results are analyzed and the best support scheme is selected. The best parameters of bolting, mesh and cable support obtained by analysis and simulation are used in the field practice in the track roadway of the first mining area of Yuncheng Coal Mine. The test results show that the optimum supporting parameters can effectively control the deformation and failure of surrounding rock under the action of high ground stress in hard rock roadway of deep well. It meets the need of effectively controlling the service life of surrounding rock and roadway and provides an important reference value for the support of high stress and hard roadway under similar geological conditions in the future.
【学位授予单位】：山东科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD322.4
本文编号：2253437
[Abstract]:According to our country's energy strategy action plan and related research, in a long period in the future, our country will still be based on coal energy structure. Among the proven coal resources in China, 2.95 脳 1012t buried depth is below 1000m, accounting for 53% of the total coal resources in China. In deep underground engineering, creep is one of the important reasons for the instability of surrounding rock in coal and rock mass engineering. In recent years, more and more hard rock roadways with large buried depth and high ground stress appear deformation and failure events of surrounding rock caused by creep. Therefore, it is very important and urgent to study the creep characteristics and long-term stability of roadway with high stress in deep well. Combined with the geological conditions of the track roadway in Yuncheng Coal Mine, the deformation law and mechanical properties of the surrounding rock of the roadway with high stress in deep well and high stress are studied by using the methods of theoretical analysis, numerical simulation and field monitoring. The deformation failure mechanism and long-term stability control methods are analyzed and studied. Through the field measurement and analysis, the displacement of surrounding rock on the surface of roadway increases with exponential function, and the roof and two sides of roadway are the key points of the stability control of surrounding rock. Based on the viscoelastic theory, the mechanical characteristics of surrounding rock of roadway with high stress and high stress in deep well are analyzed, and the formulas of deformation displacement and deformation rate at any point in surrounding rock of roadway are obtained. The stress field, displacement field and plastic failure zone of roadway after excavation are analyzed and studied by using Flac3D numerical simulation software, and the deformation and failure characteristics of surrounding rock of roadway with high stress in deep well are determined. The factors affecting the surrounding rock stability of roadway with high stress in deep well are summarized as natural factor and artificial controllable factor, among which artificial controllable factors mainly include: supporting way, parameters of supporting material and so on. The supporting parameters include the length, diameter, spacing, pretension and so on of anchor rod (cable). The orthogonal test method is used to screen the schemes for matching the support parameters between different levels, and then the Flac3D numerical simulation software is used to simulate the schemes. AX and Y are selected as indexes to evaluate the support effect of different schemes. The simulation results are analyzed and the best support scheme is selected. The best parameters of bolting, mesh and cable support obtained by analysis and simulation are used in the field practice in the track roadway of the first mining area of Yuncheng Coal Mine. The test results show that the optimum supporting parameters can effectively control the deformation and failure of surrounding rock under the action of high ground stress in hard rock roadway of deep well. It meets the need of effectively controlling the service life of surrounding rock and roadway and provides an important reference value for the support of high stress and hard roadway under similar geological conditions in the future.
【学位授予单位】：山东科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD322.4
【参考文献】
相关期刊论文 前10条
1 朱超;;我国煤炭行业供给侧改革探索[J];中国煤炭;2016年10期
2 张千贵;梁永昌;范翔宇;李广治;李纬韬;杨博仲;童盟;;基于能量守恒定律对西原模型的改进与验证[J];重庆大学学报;2016年03期
3 王显政;;能源革命和经济发展新常态下中国煤炭工业发展的战略思考[J];中国煤炭;2015年04期
4 谢和平;高峰;鞠杨;高明忠;张茹;高亚楠;刘建峰;谢凌志;;深部开采的定量界定与分析[J];煤炭学报;2015年01期
5 赵同彬;谭云亮;刘姗姗;肖亚勋;;加锚岩体流变特性及锚固控制机制分析[J];岩土力学;2012年06期
6 齐亚静;姜清辉;王志俭;周创兵;;改进西原模型的三维蠕变本构方程及其参数辨识[J];岩石力学与工程学报;2012年02期
7 左宇军;李术才;朱万成;张义平;;深部断续节理岩体中渗流对巷道稳定性影响的数值分析[J];岩土力学;2011年S2期
8 ;Failure mechanism and stability control technology of rock surrounding a roadway in complex stress conditions[J];Mining Science and Technology;2011年03期
9 杨双锁;;煤矿回采巷道围岩控制理论探讨[J];煤炭学报;2010年11期
10 熊良宵;杨林德;张尧;;硬岩的复合黏弹塑性流变模型[J];中南大学学报(自然科学版);2010年04期
相关博士学位论文 前2条
1 万世文;深部大跨度巷道失稳机理与围岩控制技术研究[D];中国矿业大学;2011年
2 陈坤福;深部巷道围岩破裂演化过程及其控制机理研究与应用[D];中国矿业大学;2009年
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