迈步式吸能支架-巷道围岩系统动力响应数值分析  

Numerical analysis on dynamic response of stepping-type energy-absorbing support and roadway surrounding rock system

作　　者：黄爱新 唐治[1,2] 吴昊 杨永峰 吕进国[1] 吴志伟 HUANG Aixin;TANG Zhi;WU Hao;YANG Yongfeng;LYU Jinguo;WU Zhiwei(School of Mechanics and Engineering,Liaoning Technical University,Fuxin Liaoning 123000,China;Ordos Research Institute of Liaoning Technical University,Ordos Inner Mongolia 017000,China)

机构地区：[1]辽宁工程技术大学力学与工程学院,辽宁阜新123000 [2]辽宁工程技术大学鄂尔多斯研究院,内蒙古鄂尔多斯017000

出　　处：《中国安全生产科学技术》2024年第10期73-80,共8页Journal of Safety Science and Technology

基　　金：辽宁工程技术大学鄂尔多斯研究院校地科技合作培育项目(YJY-XD-2023-001)。

摘　　要：为防止吸能支架与冲击地压引起的围岩发生共振,提高巷道支护围岩体系的安全性。采用理论分析和数值模拟方法,建立吸能支架-巷道围岩系统模型,考虑初始应力条件,通过在巷道上方施加简谐激励以模拟动载作用,研究在不同动载频率下吸能支架动力响应规律。研究结果表明:当外界扰动频率接近系统固有频率时,会发生共振现象。动载作用下,吸能支架最大位移发生在顶梁,而顶梁位移分布呈中间大两端小趋势,应力分布呈中间高两边低趋势;靠近顶板和靠近动载源处的围岩的加速度幅值较大。动载频率为吸能支架固有频率时,立柱的振动频率与围岩振动频率相差较小。研究结果为动载作用下巷道围岩控制提供有益参考。In order to prevent the resonance between the energy-absorbing support and the surrounding rock caused by rock burst,and improve the safety of the surrounding rock system of roadway support,a model of energy-absorbing support and roadway surrounding rock system was established by using the theoretical analysis and numerical simulation methods.Considering the initial stress condition,the dynamic response law of energy-absorbing support under different dynamic load frequencies was studied by applying harmonic excitation above the roadway to simulate the dynamic load.The results show that the resonance phenomenon occurs when the external disturbance frequency is close to the natural frequency of the system.Under the action of dynamic load,the maximum displacement of the energy-absorbing support occurs at the top beam,while the displacement distribution of the top beam presents a trend of large in the middle and small at both ends,and the stress distribution presents a trend of high in the middle and low on both sides.The acceleration amplitude of surrounding rock near the roof and near the dynamic load source is larger.When the dynamic load frequency is the natural frequency of the energy-absorbing support,the vibration frequency of the column is less different from the vibration frequency of the surrounding rock.The research results provide a useful reference for the control of roadway surrounding rock under dynamic load.

关 键 词：冲击地压 迈步式吸能支架 动载频率 巷道围岩 

分 类 号：X936[环境科学与工程—安全科学]