Through the comparison of seismic wave attenuation and plastic strain, except for geometrical attenuation, the plastic deformation of coal and rocks is also contributing to energy consumption.

通过地震波的衰减规律与塑性应变变化的比较可见，能量的消耗除了几何扩展衰减外，煤岩体的塑性变形方面也起了一定的作用。

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Assuming a trilinear geometrical spreading model, we obtained the attenuation function in Guangdong region.

采用三段几何衰减模型拟合，得到了广东地区的几何衰减函数。

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Aiming at the attenuation of stress wave traveling through the rock joints, the influences of joint geometrical shape and stiffness on the stress wave transmission coefficient are analyzed.

针对应力波穿过节理面产生的衰减现象，研究节理面的几何形状、法向刚度对应力波的透射性影响。

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