| 岩石声速与其损伤及声发射关系研究 |
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| 引用本文： | 赵奎,金解放,王晓军,赵康.岩石声速与其损伤及声发射关系研究[J].岩土力学,2007,28(10):2105-2109. |
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| 作者姓名： | 赵奎 金解放 王晓军 赵康 |
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| 作者单位： | 江西理工大学,环境与建筑工程学院,赣州,341000 |
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| 基金项目： | 国家自然科学基金;江西省教育厅科研项目 |
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| 摘 要： | 首先,建立了单轴压缩过程岩石损伤参量、应变与声速之间的定量关系式,分析了不同均质度对单轴压缩过程岩石声速的影响,结果表明,随着均匀度的增加,单轴压缩过程中声速由平缓变化到急剧变化,这与已有的岩石声发射数值模拟分析结果是一致的;其次,根据建立的声速与应变的关系公式,通过单轴压缩过程岩石声速与应变实测结果的回归分析,得到了具有较高精度的回归方程,从而通过试验验证了所建立的关系式的正确性;最后,从损伤的角度讨论了单轴压缩过程岩石声速与声发射的关系,得出了Kaiser点应位于声速初始下降点附近的结论,为岩石声发射测量地应力试验中Kaiser点的确定提供了新的方法。
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| 关 键 词： | 单轴压缩 岩石损伤 声速 均质度 声发射 |
| 文章编号： | 1000-7598-（2007）10-2105-06 |
| 收稿时间： | 2006-03-29 |
| 修稿时间： | 2006-03-29 |
Study on rock damage and acoustic emission based on ultrasonic velocity test of rock specimen under uniaxial compression |
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| ZHAO Kui,JIN Jie-fang,WANG Xiao-jun,ZHAO Kang.Study on rock damage and acoustic emission based on ultrasonic velocity test of rock specimen under uniaxial compression[J].Rock and Soil Mechanics,2007,28(10):2105-2109. |
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| Authors: | ZHAO Kui JIN Jie-fang WANG Xiao-jun ZHAO Kang |
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| Institution: | School of Environmental and Architectural Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China |
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| Abstract: | A new formula to estimate rock specimen damage parameter and its strain is established by means of ultrasonic velocity test under uniaxial compression.According to the formula ultrasonic velocity characterization with different homogeneity indices under uniaxial compression is analyzed.As the homogeneity index increases,the ultrasonic velocity decline rate increases.This conclusion coincides with numerical test of rock acoustic emission(AE).Regression analysis between rock ultrasonic velocity and strain is carried out based on the test results of rock under uniaxial compression.From the above point of view,the regression equation between rock ultrasonic velocity and strain which is of comparatively high accuracy,is obtained.And it reveals that the established formula is reliable.Kaiser effect of AE will appears when ultrasonic velocity declines obviously according to the discussion of the relationship between ultrasonic velocity and AE during the deformation of rock under uniaxial compression.So the result is helpful to research in-situ stress measurement using Kaiser effect of AE under uniaxial compression. |
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| Keywords: | uniaxial compression rock damage ultrasonic velocity homogeneity index acoustic emission |
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