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投稿时间:2021-07-12 修订日期:2021-07-26
投稿时间:2021-07-12 修订日期:2021-07-26
中文摘要: 研究具有层状特征的节理岩巷应力分布规律与变形机制及控制对策,通过将巷道直墙拱形断面等效为圆形断面,分析层状节理岩巷应力分布和应力集中影响,并以云南某矿埋深为750m的阶段运输巷道为研究对象,通过现场调查和phase 2数值模拟等方法,分析了巷道变形机制并给出了相应的支护对策。研究结果表明:通过粒子群算法得出的巷道应力集中影响可知:在巷道极角为135°、岩层倾角为45°时巷道应力集中影响指标最大;分析了围岩的变形破坏机制:围岩内节理发育,在地应力的作用下裂隙向深部扩展,最终导致围岩变形破坏;通过对设计的非对称支护方案进行分析,该方案可有效控制围岩变形,保证巷道围岩的整体稳定。研究结果为该类节理岩巷变形机制分析及控制提供了借鉴。
Abstract:For the study of layered characteristics of joints and rock stress distribution and deformation mechanism and control countermeasures, by putting a straight wall arch section of roadway equivalent for circular cross section, analysis of layered joint rock stress distribution and stress concentration effects, and embedded depth of a mine in Yunnan province is 750 m phase transport roadway as the research object, through field investigation and phase 2 numerical simulation method, etc. The deformation mechanism of roadway is analyzed and the corresponding supporting countermeasures are given. The research results show that the influence of tunnel stress concentration obtained by particle swarm optimization algorithm shows that the influence index of tunnel stress concentration is the largest when the tunnel extreme Angle is 135° and the rock strata dip Angle is 45°.The deformation and failure mechanism of the surrounding rock is analyzed. The joints in the surrounding rock develop and the cracks expand to the deep under the action of the ground stress, which eventually leads to the deformation and failure of the surrounding rock. Through the analysis of the designed asymmetric support scheme, the scheme can effectively control the deformation of surrounding rock and ensure the overall stability of surrounding rock. The research results provide a reference for the deformation mechanism analysis and control of this kind of jointed rock roadway.
文章编号: 中图分类号: 文献标志码:
基金项目:国家自然科学基金面上项目(41672303)
作者 | 单位 | |
刘博 | 昆明理工大学 国土资源工程学院 | 785812755@qq.com |
李克钢* | 昆明理工大学 国土资源工程学院 | 3151252644@qq.com |
李旺 | 云南驰宏锌锗股份有限公司 | |
刘尉俊 | 云南驰宏锌锗股份有限公司 | |
秦庆词 | 昆明理工大学 国土资源工程学院 | |
李明亮 | 昆明理工大学 国土资源工程学院 | |
吴苏 | 河海大学 岩石力学与堤坝工程教育部重点实验室 |
引用文本:
刘博,李克钢,李旺,刘尉俊,秦庆词,李明亮,吴苏.节理岩巷应力分布规律与失稳机制研究[J].有色金属工程,2022,(2):106-113.
刘博,李克钢,李旺,刘尉俊,秦庆词,李明亮,吴苏.节理岩巷应力分布规律与失稳机制研究[J].有色金属工程,2022,(2):106-113.