不同岩性的裂隙岩石破裂热–声敏感性分析

doi:10.13722/j.cnki.jrme.2021.1161

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摘要岩石破裂过程存在热红外和声发射信号变化，因此研究含裂隙岩石破裂过程热–声信号具有重要意义。为研究不同岩性裂隙岩石破坏过程的热–声敏感强度，对花岗岩、玄武岩、红砂岩、灰岩及大理岩试样开展了单轴压缩试验，对试样加载过程临空面温度和内部声学信号进行了监测，提出了热–声敏感性联合分析指标。研究结果表明：热–声联合指标时序敏感性依次为：红砂岩、灰岩、大理岩、花岗岩、玄武岩；热–声联合指标峰值敏感性依次为：玄武岩、花岗岩、大理岩、灰岩、红砂岩；热红外温度信号早于声发射信号；联合指标能够避免声发射信号的滞后性和热红外的空间局限性；各岩性岩石破裂过程中热–声信号和应力有很好的对应关系。相关研究可为岩石突发性失稳破坏的分析和防治提供有益参考。

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	陈国庆1
	李阳1
	陈亚烽1
	马金根2
	吴章雷2

关键词 ：岩石力学, 裂隙岩石, 不同岩性, 声发射, 热红外, 敏感性

Abstract：There are thermal infrared and acoustic emission signal changes in the rock fracture process. Therefore，it is of great significance to study the thermo-acoustic signal in the fracture process of fractured rock. In order to study the thermal-acoustic sensitivity of the failure process of different lithological fractures，uniaxial compression tests on samples of granite，basalt，red sandstone，limestone and marble were carried out，and the temperature of the free surface and the internal acoustic signal of the samples during loading process were monitored. A joint analysis index of thermal-acoustic sensitivity is proposed. The results indicate that the time series sensitivity of the combined thermal-acoustic index is as follows：red sandstone，limestone，marble，granite and basalt，but the peak sensitivity of the combined thermal-acoustic index is as follows：basalt，granite，marble，limestone and red sandstone. Thermal infrared temperature signal is earlier than acoustic emission signal. The joint index can avoid the lag of acoustic emission signal and the spatial limitation of thermal infrared. The thermo-acoustic signal and the stress have a good corresponding relationship in the fracture process of each lithological rock. The research can provide a useful reference for the analysis and prevention of sudden rock failure.

Key words： rock mechanics fractured rock different lithologies AE thermal infrared sensitivity

引用本文:

陈国庆1，李阳1，陈亚烽1，马金根2，吴章雷2. 不同岩性的裂隙岩石破裂热–声敏感性分析[J]. 岩石力学与工程学报, 2022, 41(10): 1945-1957.
CHEN Guoqing1，LI Yang1，CHEN Yafeng1，MA Jingen2，WU Zhanglei2. Thermal-acoustic sensitivity analysis of fractured rock with different lithologies. , 2022, 41(10): 1945-1957.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2021.1161 或 http://rockmech.whrsm.ac.cn/CN/Y2022/V41/I10/1945

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