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Study on Acoustic Emission Characteristics of Tunnel Wall Rock of North Wuyi Mountain in Laboratory

Abstract

作为一种无损检测技术,声发射与微震监测技术常被用作研究脆性材料在荷载作用下失稳破坏的工具,它是利用声波或地震原理来探测岩爆发生前岩体破裂的前兆特性,进而对可能要发生的岩爆进行评估和预警。北武夷山隧道福建段有长约1150m施工段埋深在644.3~1100m之间,属于极高应力区。在这样的大埋深、高地应力条件下进行隧洞开挖,极易在开挖过程中引起岩爆,因此在施工掘进过程中,采用声发射与微震监测技术对隧洞围岩体稳定性进行连续、实时监测。为更好地开展施工现场的声发射微震监测预警工作,本文针对具有典型代表性的凝灰岩和花岗岩进行室内声发射特性研究,根据其加载破坏过程中的声发射特性,为现场监测预警工作提供参考依...As a kind of nondestructive testing technology, Acoustic Emission and Micro-seismic monitoring is a good tool to study the failure course of fragile material. They use acoustic wave or earthquake theory to detect the precursory characteristics of rock cracking before rock-burst, then evaluate and warn the potential rock-burst. Fujian section of North Wuyi Mountain tunnel has a total length of 1150...学位:工学硕士院系专业:建筑与土木工程学院_岩土工程学号:2532012115171

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