中南大学学报（自然科学版）2024，Vol.55Issue(9)：3426-3440,15.DOI:10.11817/j.issn.1672-7207.2024.09.017
锚杆支护吸能调控效应理论解析与数值模拟
Theoretical analysis and numerical simulation of energy absorption and control effect of bolt support
摘要
Abstract
To reveal the energy absorption and regulation effects of bolt support and the energy field distribution in roadway surrounding rock,theoretical analysis and numerical simulation methods were employed.Firstly,using classical elastoplastic theory and the energy conservation law,the relationships among elastic deformation energy,dissipated energy,and external work in supported roadway surrounding rock were analyzed,deriving an initial expression for bolt energy absorption.Secondly,based on FLAC3D software and embedded Fish language programming,an energy unit module was developed to simulate the prestress diffusion and energy release characteristics of anchorage bodies.Thirdly,by traversing the element grid,the energy of each rock unit was calculated,and the total deformation energy,elastic deformation energy,and dissipated energy and their distribution characteristics were obtained.Finally,the energy field distribution was revealed under excavation and bolt support conditions.Reasonable bolt parameters was determined,such as length and spacing.The results show that bolts primarily regulate the energy field distribution and dissipation characteristics of roadway surrounding rock by enhancing the mechanical parameters of the rock mass and converting absorbed energy.As the bolt spacing decreases and the bolt length increases,the maximum dissipated energy density in the surrounding rock of the roadway tends to decrease.关键词
锚杆支护/吸能调控/理论解答/FLAC3D数值模拟/能量模型Key words
bolt support/energy absorption and control/theoretical explanation/FLAC3D numerical simulation/energy model分类
矿山工程引用本文复制引用
孟庆彬,辛学奎,宋子鸣,程争民,宋洋..锚杆支护吸能调控效应理论解析与数值模拟[J].中南大学学报（自然科学版）,2024,55(9):3426-3440,15.基金项目
国家重点研发计划资助项目(2021YFC2902103) （2021YFC2902103）
国家自然科学基金资助项目(52074268,51704280) （52074268,51704280）
中国博士后科学基金资助项目(2021T140708)(Project(2021YFC2902103)supported by the National Key Research and Development Plan of China （2021T140708）
Projects(52074268,51704280)supported by the National Natural Science Foundation of China （52074268,51704280）
Project(2021T140708)supported by China Postdoctoral Science Foundation) （2021T140708）
