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首页> 外文期刊>Rock Mechanics and Rock Engineering >True Triaxial Experimental Study of Rockbursts Induced By Ramp and Cyclic Dynamic Disturbances
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True Triaxial Experimental Study of Rockbursts Induced By Ramp and Cyclic Dynamic Disturbances

机译：斜坡和循环动态扰动突发的真实三轴试验研究

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摘要

A modified rockburst testing system was utilized to reproduce rockbursts induced by ramp and cyclic dynamic disturbances with a low-intermediate strain rate of 2 x 10(-3)-5 x 10(-3) s(-1) in the laboratory. The experimental results show that both the ramp and cyclic dynamic disturbances play a significant role in inducing rockbursts. In the tests of rockbursts induced by a ramp dynamic disturbance, as the static stress before the dynamic disturbance increases, both the strength of specimens and the kinetic energy of the ejected fragments first increase and then decrease. In the tests of rockbursts induced by a cyclic dynamic disturbance, there exists a rockburst threshold of the static stress and the dynamic disturbance amplitude, and the kinetic energy of the ejected fragments first increases and then decreases as the cyclic dynamic disturbance frequency increases. The main differences between rockbursts induced by ramp dynamic disturbances and those induced by cyclic dynamic disturbances are as follows: the rockburst development process of the former is characterized by an impact failure feature, while that of the latter is characterized by a fatigue failure feature; the damage evolution curve of the specimen of the former has a leap-developing form with a significant catastrophic feature, while that of the latter has an inverted S-shape with a remarkable fatigue damage characteristic; the energy mechanism of the former involves the ramp dynamic disturbance giving extra elastic strain energy to rocks, while that of the latter involves the cyclic dynamic disturbance decreasing the ultimate energy storage capacity of rocks.
机译：用于在实验室中使用斜坡和循环动态扰动造成的岩浆和循环动态扰动的岩浆及其在实验室中的低中间应变率。实验结果表明，斜坡和循环动态障碍都在诱导岩虫中发挥着重要作用。在通过斜坡动态扰动引起的摇滚乐系的测试中，随着动态扰动之前的静态应力增加，样本的强度和喷射片段的动能首先增加然后减少。在通过循环动态扰动引起的摇滚乐系的测试中，存在静态应力和动态扰动幅度的摇滚骨阈值，并且喷射片段的动能首先增加，然后随着循环动态扰动频率的增加而降低。由斜坡动态扰动和循环动态扰动引起的摇滚症之间的主要差异如下：前者的摇滚爆发开发过程的特点是影响失败特征，而后者的特点是疲劳失效特征;前者标本的损伤演化曲线具有具有显着灾难性特征的跨越式形式，而后者的抗体具有倒置的S形，具有显着的疲劳损坏特性;前者的能量机制涉及斜坡动态扰动，使额外的弹性应变能量达到岩石，而后者的动态扰动涉及循环动态扰动降低岩石的最终能量储存能力。

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  • 作者

    Su Guoshao; Hu Lihua; Feng Xiating; Yan Liubin; Zhang Gangliang; Yan Sizhou; Zhao Bin; Yan Zhaofu;

  • 作者单位

    Guangxi Univ Sch Civil &

    Architecture Engn Key Lab Disaster Prevent &

    Struct Safety Minist Educ 100 Daxue Ave Nanning 530004 Guangxi Provinc Peoples R China;

    Guangxi Univ Sch Civil &

    Architecture Engn Key Lab Disaster Prevent &

    Struct Safety Minist Educ 100 Daxue Ave Nanning 530004 Guangxi Provinc Peoples R China;

    Chinese Acad Sci Inst Rock &

    Soil Mech State Key Lab Geomech &

    Geotech Engn Wuhan 430071 Hubei Peoples R China;

    Guangxi Univ Sch Civil &

    Architecture Engn Key Lab Disaster Prevent &

    Struct Safety Minist Educ 100 Daxue Ave Nanning 530004 Guangxi Provinc Peoples R China;

    Guangxi Univ Sch Civil &

    Architecture Engn Key Lab Disaster Prevent &

    Struct Safety Minist Educ 100 Daxue Ave Nanning 530004 Guangxi Provinc Peoples R China;

    Guangxi Univ Sch Civil &

    Architecture Engn Key Lab Disaster Prevent &

    Struct Safety Minist Educ 100 Daxue Ave Nanning 530004 Guangxi Provinc Peoples R China;

    Guangxi Univ Sch Civil &

    Architecture Engn Key Lab Disaster Prevent &

    Struct Safety Minist Educ 100 Daxue Ave Nanning 530004 Guangxi Provinc Peoples R China;

    Guangxi Univ Sch Civil &

    Architecture Engn Key Lab Disaster Prevent &

    Struct Safety Minist Educ 100 Daxue Ave Nanning 530004 Guangxi Provinc Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 岩石（岩体）力学及岩石测试;
  • 关键词

    Rockburst; Dynamic disturbance; True triaxial test; Damage evolution; Experimental test;

    机译：摇滚乐;动态干扰;真正的三轴试验;损伤进化;实验测试;

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