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高强度等级中空锚索与线性锚索束协同支护技术 被引量:1

Cooperative support technology of high strength hollow anchor cable and linear anchor cable bundle
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摘要 中空注浆锚索由于其特殊的中空结构,导致极限承载能力较常用实心锚索降低了30%以上,难以满足深部复杂应力环境巷道的支护要求。研究开发了2060MPa高强度等级中空注浆锚索,经实验室和现场实测,其极限承载能力达到了660kN以上,并指出了其拉力分散型的力学本质。为避免巷道顶板岩层水平移动导致的锚索剪切破坏,提出了高强度等级中空注浆锚索与线性锚索束协同支护技术,阐释了两种支护结构协同支护作用机制。选择顾桥矿1127(1)运输巷巷修工程为背景,开展了高强度等级中空注浆锚索与线性锚索束协同支护技术的现场试验,应用结果表明,该技术能够有效控制深部高地压巷道的围岩大变形,是一种行之有效的巷道加固方式。 Due to its special hollow structure, the ultimate bearing capacity of hollow grouting anchor cable is reduced by over 30% compared with the common solid anchor cable, which is difficult to meet the support requirements of deep tunnels in complex stress environment. The 2060MPa high-strength hollow grouting anchor cable was developed. According to laboratory and field measurements, its ultimate bearing capacity was more than 660kN, and the mechanical essence of its tension dispersion type was pointed out. In order to avoid the shear failure of the anchor cable caused by the horizontal movement of the roadway roof strata, the cooperative support technology of high-strength hollow grouting anchor cable and linear anchor cable bundle was proposed, and the cooperative support mechanism of the two support structures was explained. Taking the 1127(1) transportation lane floor roadway repair project in Guqiao Mine as the background, the field test of the cooperative support technology of high-strength hollow grouting anchor cable and linear anchor cable bundle was carried out. The application results show that this technology can control the large deformation of surrounding rock in deep high pressure roadway, and it is an effective roadway reinforcement method.
作者 王光胜 杨永刚 张辉 李世辉 张涛 杨张杰 徐永良 WANG Guang-sheng;YANG Yong-gang;ZHANG Hui;LI Shi-hui;ZHANG Tao;YANG Zhang-jie;XU Yong-liang(Huainan Mining(Group)Co.,Ltd.,Coal Branch,Huainan 232095,China;Center of Coal Mine Support,Anhui Coal Mining Research Institute,Hefei 230001,China;Huainan Donghua Ouke Mine Support Equipment Co.,Ltd.,Huainan 232000,China)
出处 《煤炭工程》 北大核心 2023年第1期27-31,共5页 Coal Engineering
基金 安徽省重点研究与开发计划资助项目(1804a0802210)。
关键词 围岩控制 中空注浆锚索 线性锚索束 轮次注浆 钻孔窥视 surrounding rock control hollow grouting anchor cable linear anchor cable bundle multiple grouting borehole peeping
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