常法向刚度下锚杆杆体–树脂界面剪切力学特性试验研究

doi:10.13722/j.cnki.jrme.2020.0098

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摘要锚杆杆体–树脂界面是研究锚杆锚固理论的基础，为分析其力学演化规律，采用简化的二维剪切模型开展了常法向刚度剪切试验，基于厚壁圆筒理论计算得到软质含煤岩体边界条件的法向刚度范围，研究肋间距和法向刚度对杆体–树脂界面力学演化规律的影响。分析试验结果发现，锚杆的综合最优肋间距随围岩条件的变化而变化，对弹性模量为0.25～1 GPa的岩体，最优肋间距为15 mm，对弹性模量为1.9～3.8 GPa的岩体，最优肋间距为30 mm，结合界面破坏模式，对界面切向和法向力学演化规律进行分析与解释，对比分析峰值法向应力与峰值剪切应力，提出不同肋间距和法向刚度下界面破坏的主要控制因素。

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	邓亮1
	张传庆2
	3
	周丽4
	崔国建2
	3
	吕浩安2
	3
	汤艳春1
	周辉2
	3

关键词 ：采矿工程, 树脂锚杆, 杆体&ndash, 树脂界面, 常法向刚度, 界面剪切试验, 最优肋间距

Abstract：The bolt-resin interface is the basis for studying the anchoring mechanism of resin bolts. In order to research mechanical evolution law of bolt-resin interfaces，constant normal stiffness shear test was carried out using a simplified two-dimensional shear model，and the normal stiffness range of the soft coal-bearing rock mass was calculated based on the theory of thick-walled cylinder. On this basis，the effect of the rib spacing and the normal stiffness on the mechanical evolution of rod-resin interfaces was studied. The test results show that the comprehensive optimal rib spacing of the bolt is affected by the country rock conditions. The optimal rib spacings are respectively 15 mm and 30 mm for the elastic modulus of rock mass in the ranges of 0.25–1 GPa and 1.9–3.8 GPa. Combined with the interface failure modes，the shear and normal mechanical evolution laws of the interface are analyzed and explained. By comparing the peak normal stress and peak shear stress，the main controlling factors for interface failure under different rib spacings and normal stiffnesses are proposed.

Key words： mining engineering resin bolts bolt-resin interfaces constant normal stiffness interfacial shear test optimal rib spacing

引用本文:

邓亮1，张传庆2，3，周丽4，崔国建2，3，吕浩安2，3，汤艳春1，周辉2，3. 常法向刚度下锚杆杆体–树脂界面剪切力学特性试验研究[J]. 岩石力学与工程学报, 2020, 39(11): 2254-2263.
DENG Liang1，ZHANG Chuanqing2，3，ZHOU Li4，CUI Guojian2，3，LYU Haoan2，3，TANG Yanchun1，ZHOU Hui2，3. Experimental study on shear mechanical properties of bolt-resin interfaces under constant normal stiffness. , 2020, 39(11): 2254-2263.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2020.0098 或 http://rockmech.whrsm.ac.cn/CN/Y2020/V39/I11/2254

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