1. School of Mechanics and Engineering,Liaoning Technical University,Fuxin　 123000,China; 2. Liaoning University,Shenyang　 110036,China; 3. Liaon-ing Technical University,Fuxin　 123000,China; 4. Research Institute of Rock Burst,Liaoning Technical University,Fuxin　 123000,China

为使锚杆适应深埋巷道围岩大变形,有效防治巷道冲击地压灾害,设计了一种适用于锚杆的轴裂式防冲吸能构件。通过理论分析与室内试验,研究了轴裂式吸能构件的变形特性、吸能效果等;探讨构件在锚杆中的应用方式与工作原理,初探了其工程试验效果。研究表明,轴裂式吸能构件撕裂变形稳定,形成"螺旋式"扩展板条,具有良好的可重复性与可控性;构件吸能作用全程具有"峰值轴力波动吸能段、恒定轴力稳定吸能段"两阶段特性,且吸能构件经过预撕裂加工可消除波动载荷,使恒定轴力稳定吸能行程效率达到100%;采用内径26 mm、壁厚4 mm,预制导裂切线4或6条的吸能构件,其恒定轴力达到111.8~143.1 k N,相应吸能量达5.77~8.93 k J,构件恒定载荷值及其吸能量的试验结果与理论分析结果相符合。现场试验表明,轴裂式构件能较好地启动劈裂,实现让压耗能。

Axial splitting anti-impact and energy-absorption components used in anchor bolts are designed to make an-chor bolts adapt to a large deformation of surrounding rock in deep roadway,effectively preventing rock burst. The the-oretical and experimental methods were used to analyze the deformation properties and energy absorption effect of axial splitting components. And the application mode and working principle of the component in anchor bolt tail were pre-liminary analyzed and field test effect was studied. The results show that the axial splitting components deform stably, producing radially spiral strips with a good degree of repeatability and controllability. There are two typical energy ab-sorption stages in load-displacement curves,i. e. ,“fluctuant energy absorption stage with peak load” and “stable en-ergy absorption stage with constant load”. And the fluctuant axial load could be eliminated by advance splitting process,which can make the efficiency of stable energy absorption reach 100% . For components which are 26 mm in diameter and 4 mm in thickness,the constant axial load reach 111. 8 ~ 143. 1 kN,and the energy absorption value reach 5. 77 ~ 8. 93 kJ,the theoretical value of constant axial load and energy absorption is close to experimental value of that. Field test shows that the components could split to yield.

国家自然科学基金资助项目(51404131)；国家重点研发计划重点专项课题资助项目(2016YFC0801403)；辽宁省煤炭资源安全开采与洁净利用工程研究中心开放基金资助项目(LNTU15KF11)；

Dai Lianpeng,Pan Yishan,Wang Aiwen. Deformation and energy-absorption properties of axial splitting components and its primary appli-cation[J]. Journal of China Coal Society,2017,42(7):1682-1690.