Influence of temperature on the strainburst characteristics of granite under true triaxial loading conditions
Influence of temperature on the strainburst characteristics of granite under true triaxial loading conditions
复制标题
真三轴加载条件下温度对花岗岩应变爆发特性的影响
DOI：
10.1016/j.enggeo.2017.03.021
复制
发表时间：
2017-05
影响因子：
7.4
通讯作者：
Chen ZY
中科院分区：
文献类型：
--
作者：
Su Guoshao;Chen Zhiyong;Ju J. Woody;Jiang Jianqing;Ju J. Woody;Chen ZY
采用新型真三轴岩爆试验系统对不同高温处理花岗岩的应变爆裂进行了试验研究。测试过程中，给出了一条加载路径，保留一个自由面，然后在其他五个面上加载。利用应力应变曲线、高速摄像系统和声发射技术，对应变爆发过程、失效模式、峰值应力、声发射信号特征、破片特征以及弹射破片的动能进行了分析。实验结果表明，温度对应变爆发有显着影响。这些样本的临界温度为 300 °C。随着温度从30°C升高到300°C，峰值应力、峰值应变和AE过程表现出轻微的变化，而喷射碎片的动能迅速增加。当温度从300℃升高到700℃时，峰值应力和动能明显下降，但峰值应变迅速上升。 AE安静期和碎片的时间随着温度的升高而增加。与30℃试件相比，100℃～500℃处理的试件岩爆强度更大，而600℃～700℃处理的试件喷出破片的动能较小。
The experimental study of the strainburst on granite treated with different high temperatures was conducted using a novel true-triaxial rockburst test system. During the test process, a loading path was given by keeping one free face and then loading on other five faces. The strainburst process, the failure patterns, the peak stress, the acoustic emission (AE) signal characteristics, the fragment characteristics and the kinetic energy of the ejected fragments were analyzed by employing the stress-strain curves, the high speed camera system and the AE technology. The experimental results show that temperature has significant influences on the strainburst. The critical temperature of these specimens is 300 °C. With the temperature increasing from 30 °C to 300 °C, the peak stress, the peak strain and the AE process exhibit a slight variation, while the kinetic energy of the ejected fragments rapidly increases. When the temperature increases from 300 °C to 700 °C, the peak stress and the kinetic energy apparently decrease, but the peak strain swiftly rises. The time of the AE quiet period and the fragmentation increase with rising temperature. Compared with the specimens at 30 °C, the specimens treated with temperatures from 100 °C to 500 °C have more intense rockburst, while the specimens treated with temperatures from 600 °C to 700 °C have a lesser kinetic energy of the ejected fragments.
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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
影响因子：
--
作者：
J. Simo;J. Ju
通讯作者：
J. Simo;J. Ju
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
DOI：
10.1007/s11431-009-0063-y
发表时间：
2009-02
期刊：
Science in China Series E: Technological Sciences
影响因子：
--
作者：
Lian-ying Zhang;X. Mao;A. Lu
通讯作者：
Lian-ying Zhang;X. Mao;A. Lu
影响因子：
6.2
作者：
Liang, W. G.;Xu, S. G.;Zhao, Y. S.
通讯作者：
Zhao, Y. S.