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Reinforcement of rock mass with cross-flaws using rock bolt

机译:使用锚杆加固带有交叉缺陷的岩体

摘要

Rock bolting is one of the most effective and economical means of rock mass reinforcement. Existing studies of rock bolt reinforcement are mostly focused on rock masses without flaw, with a single flaw, or with parallel flaws. However in rock masses, cracks or flaws usually exist in the form of cross-flaws. In order to understand the impact of cross-flaws on rock bolt reinforcement and to further explore the differences of bolt reinforcement between rock mass with cross-flaws and rock mass with a single flaw, reinforced analog specimens with cross-flaws and with a single flaw were tested under uniaxial compressive condition. The experimental results show that the uniaxial compressive strength of the reinforced rock mass with cross-flaws in this research is higher than that of reinforced rock mass with a single flaw. This observation can be explained by the difference in the failure modes of reinforced specimens: the reinforced rock masses with a single flaw fail due to the formation of a shear crack while reinforced rock masses with cross-flaws fail as a result of a tensile fracture or interaction between tensile fracture and shear fracture.
机译:锚固是岩体加固的最有效,最经济的方法之一。现有的锚杆加固研究主要集中在没有缺陷,具有单个缺陷或具有平行缺陷的岩体上。但是,在岩体中,裂纹或裂缝通常以交叉缺陷的形式存在。为了理解横断面对锚杆加固的影响,并进一步探讨横断面岩体和单缺陷岩体,横断面,单裂隙钢筋模拟标本之间锚固加固的区别。在单轴压缩条件下进行了测试。实验结果表明,本研究中存在交叉缺陷的岩体的单轴抗压强度要高于具有单个缺陷的岩体的单轴抗压强度。这种观察结果可以用钢筋试样破坏模式的不同来解释:具有单个缺陷的钢筋岩体由于剪切裂缝的形成而失效,而具有交叉缺陷的钢筋岩体由于拉伸断裂或断裂而失效。拉伸断裂与剪切断裂之间的相互作用。

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