摘要
为解决常规玻璃钢锚杆强度和延伸率低的问题,设计研发了一种在杆体尾部设有恒阻吸能装置的高强吸能玻璃钢锚杆。采用静载拉伸试验和ABAQUS数值模拟相结合的研究方法,研究了静载和不同冲击速度下高强吸能玻璃钢锚杆力学特性,并与常规玻璃钢锚杆力学性能进行了对比分析。结果表明,研发的高强吸能玻璃钢锚杆强度超过了660 MPa,在静载下的延伸率为5.16%,吸能量为15.54 kJ,分别为常规玻璃钢锚杆的2.66倍和2.55倍。冲击模拟结果表明,冲击速度在8 m/s内,高强吸能玻璃钢锚杆的延伸率、吸能量和抗冲时间均随冲击速度的增大有减小的趋势,但冲击速度对高强吸能玻璃钢锚杆延伸率和吸能量等指标的影响小于对常规玻璃钢锚杆的影响,抗冲时间明显优于常规玻璃钢锚杆。冲击速度对玻璃钢杆体的破断强度影响较小。研究成果为冲击地压巷道回采帮支护提供了新装备。
Here,to solve the problem of low strength and elongation of conventional fiber-reinforced plastic bolts,a high-strength energy absorbing fiber-reinforced plastic bolt with a constant-resistance energy absorbing device at bolt body tail was designed and developed.The study method combining static load tensile tests and ABAQUS numerical simulation was used to investigate mechanical properties of high-strength energy absorbing fiber-reinforced plastic bolts under static load and different impact velocities.Contrastive analyses were performed for these properties and those of conventional fiber-reinforced plastic bolts.Test results showed that the developed high-strength energy absorbing fiber-reinforced plastic bolt has a strength exceeding 660 MPa;it has an elongation rate of 5.16%under static load,and an energy absorption of 15.54 kJ,which are 2.66 times and 2.55 times those of conventional fiber-reinforced plastic bolts,respectively.The impact simulation results showed that within the impact velocity range of 8 m/s,elongation,energy absorption and impact resistance time of high-strength energy absorbing fiber-reinforced plastic bolt decrease with increase in impact velocity,but effects of impact velocity on elongation and energy absorption indexes of high-strength energy absorbing fiber-reinforced plastic bolt are smaller than those on conventional fiber-reinforced plastic bolt,and impact resistance time of the former is obviously longer than that of the latter;effects of impact velocity on breaking strength of fiber-reinforced plastic bolts are smaller;the study results can provide new equipment for roadway sidewall reinforcement in rock burst-prone mining environments.
作者
唐治
于明丘
施访
孟令健
TANG Zhi;YU Mingqiu;SHI Fang;MENG Lingjian(School of Mechanics and Engineering,Liaoning Technical University,Fuxin 123000,China;Erdos Research Instiyute L.N Technical University,Ordos 017000,China;Jiangsu Kehang Mining Technology Co.,Ltd.,Zhenjiang 212400,China)
出处
《振动与冲击》
北大核心
2026年第5期229-236,共8页
Journal of Vibration and Shock
基金
国家自然科学基金面上项目(52474224)
辽宁省教育厅基本科研项目(重点项目)(LJ212410147001)。
关键词
冲击地压
高强吸能
玻璃钢锚杆
抗冲力学特性
rock burst
high-strength energy absorbing
fiber-reinforced plastic bolt
impact-resistant mechanical properties
