Rockburst characteristics of several hard brittle rocks: A true triaxial experimental study
Rockburst characteristics of several hard brittle rocks: A true triaxial experimental study
复制标题
几种硬脆岩石的岩爆特征：真三轴试验研究
DOI：
10.1016/j.jrmge.2019.07.013
复制
发表时间：
2020-04
影响因子：
7.3
通讯作者：
Yan Liubin
中科院分区：
文献类型：
--
作者：
Zhai Shaobin;Su Guoshao;Yin Shunde;Zhao Bin;Yan Liubin
岩爆是一种典型的岩石破坏形式，在高应力地下工程开挖过程中，经常威胁到人员和施工设备的安全。岩石岩性是岩爆发生的控制因素。本文对花岗闪长岩、花岗岩、大理岩、玄武岩、砂岩和灰岩等六种完整硬脆岩石的矩形棱柱体试件进行了单自由面真三轴加载条件下的岩爆试验。利用高速摄影、声发射（AE）系统和扫描电镜（SEM）对不同岩石的岩爆进行了研究。结果表明，花岗闪长岩、花岗岩和大理岩的应变爆发伴随着自由面附近的拉伸劈裂，因而相对较强，有大量的破片弹射和动能释放。对于玄武岩、砂岩和灰岩，破坏主要以剪切破裂为主。玄武岩和砂岩的应变破裂相对较小，碎片喷射和动能释放较小;而石灰岩由于峰值强度相对较低，未发生破裂破坏。不同岩石的强度、破裂破碎特性和破坏模式对岩爆倾向性和强度有显著影响。声发射演化与扫描电镜分析相结合的结果表明，不同岩石的内在微观结构和加载条件下的断裂演化差异是导致不同类型岩爆的主要因素。
Rockburst is a typical rock failure which frequently threatens both human life and construction equipment during highly stressed underground excavation. Rock lithology is a control factor of rockburst. In this paper, rockburst tests were conducted on rectangular prismatic specimens of six types of intact hard brittle rocks, i.e. granodiorite, granite, marble, basalt, sandstone and limestone, under one-free-face true triaxial loading conditions. With the use of high-speed cameras, an acoustic emission(AE) system and a scanning electron microscope(SEM), rockburst of different rocks was investigated. The results show that the strainbursts of granodiorite, granite and marble were accompanied by tensile splitting near the free face, and consequently were relatively strong with a large amount of fragment ejection and kinetic energy release. For basalt, sandstone and limestone, failure was primarily dominated by shear rupture. The strainbursts of basalt and sandstone were relatively small with minor fragment ejection and kinetic energy release; while no burst failure occurred on limestone due to its relatively low peak strength. Rock strength, fracturing and fragmentation characteristics, and failure modes of different rocks can significantly affect rockburst proneness and magnitude. The AE evolution coupled with SEM analysis reveals that the differences in the inherent microstructures and fracture evolution under loading are the primary factors accounting for different rockbursts in various rock types.
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DOI：
10.1016/0148-9062(96)00021-6
发表时间：
1996-10-01
期刊：
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES & GEOMECHANICS ABSTRACTS
影响因子：
--
作者：
Linkov, AM
通讯作者：
Linkov, AM
DOI：
10.1016/j.ijrmms.2005.01.002
发表时间：
2005-04
影响因子：
7.2
作者：
Chandong Chang;B. Haimson
通讯作者：
Chandong Chang;B. Haimson
锦屏二级水电站深埋隧道两次特大岩爆后岩体破坏发展
DOI：
10.1007/s10064-013-0470-y
发表时间：
2013-03
影响因子：
4.2
作者：
Zhang, Chuanqing;Feng, Xia-Ting;Zhou, Hui;Qiu, Shili;Wu, Wenping
通讯作者：
Wu, Wenping
真三轴加载条件下温度对花岗岩应变爆发特性的影响
影响因子：
7.4
作者：
Su Guoshao;Chen Zhiyong;Ju J. Woody;Jiang Jianqing;Ju J. Woody;Chen ZY
通讯作者：
Chen ZY
隧道岩爆发展过程动态预警的微震方法
影响因子：
6.2
作者：
Feng, Guang-Liang;Feng, Xia-Ting;Yu, Yang
通讯作者：
Yu, Yang