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在500MPa的压力范围内测定了红河断裂带断层泥的密度、纵波速度和横波速度随压力的变化。实验表明:在100MPa以上,上述力学量随压力增长很快,在100MPa以上,上述力学量随压力稳定增长,其增长率比岩石相应的值高一个数量级。断层泥密度与纵波和横波速度的关系均满足Birch定律,并由此得到了红河断裂带断层泥的Birch系数。由波速资料得出了断层泥的动态杨氏模量与动态剪切模量,表明动态杨氏模量比过去得到的静态杨氏模量高一个数量级以上。
The density, longitudinal wave velocity and shear wave velocity of the fault mud in Honghe fault zone were measured with the pressure in the pressure range of 500MPa. Experiments show that above 100MPa, the mechanical strength increases rapidly with the pressure above 100MPa. The above mechanics increases steadily with pressure, and its growth rate is one order of magnitude higher than that of the rock. The relationship between fault density and longitudinal and shear wave velocities satisfies Birch ’s law, and the Birch coefficient of fault mud in Honghe fault zone is obtained. The dynamic Young’s modulus and dynamic shear modulus of fault mud are obtained from the wave velocity data, indicating that the dynamic Young’s modulus is more than one order of magnitude higher than the static Young’s modulus obtained in the past.