| 差应力条件下岩石Q值测定方法的改进 |
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| 引用本文： | 许昭永,徐东强,包一峰,韩明.差应力条件下岩石Q值测定方法的改进[J].地震研究,1992(4). |
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| 作者姓名： | 许昭永 徐东强 包一峰 韩明 |
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| 作者单位： | 云南省地震局
(许昭永,包一峰),唐山工程技术学院采矿系
(徐东强),云南省地震局(韩明) |
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| 摘 要： | 本文指出了脉冲传播和谱振幅比法测定岩石破裂孕育过程中Q值变化矛盾的原因,提出用能量法测定Q值,并以大理岩,大姚铜矿砂岩为例给出了真三轴压缩时岩石破裂孕育过程中P波总能量的变化及不同方法所测Q值的变化特征。其中能量法所测Q值与P波总能量变化特征一致,即主断裂前它们都出现了“下降—回升”变化及变化的各向异性。
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| 关 键 词： | Q 值测量谱振幅比法 能量法 P 波总能量 |
THE IMPROVED DETERMINATION METHOD OF Q-VALUES IN ROCKS UNDER DIFFERENTIAL STRESS |
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| Xu Zhaoyong Sao Yifeng Han Ming.THE IMPROVED DETERMINATION METHOD OF Q-VALUES IN ROCKS UNDER DIFFERENTIAL STRESS[J].Journal of Seismological Research,1992(4). |
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| Authors: | Xu Zhaoyong Sao Yifeng Han Ming |
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| Abstract: | In this paper, reasons of contradictory Q value variations in the process of rock fracture preparation determined by both the pulse propagation method and spectrum-amplitude ratio method have been pointed out, and the method that uses energy to determine the Q value has been presented. With the granite and sandstone specimens the total P wave energy variation in the process of rock fracture preparation under real triaxial compressions and the characteristic Q value variations by different methods are presented. The Q value by energy method is coincided with the total P wave energy variation, i. e. before the main fracture there all existed a "downfall-rise" variation and variation anisotropy. |
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| Keywords: | Q value determination Spectrum-amplitude ratio method Energy Method Total P wave energy |
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