应力波入射充填节理的透射性能研究

Study on Transmission Performance of Filled Joints with Stress Waves

为了研究充填节理对不同频率应力波透射性能的影响,根据充填节理特性设计了不同厚度和强度的节理模型,并对不同频率应力波正入射岩体节理的现象开展模拟,研究了应力波在不同强度和宽度充填节理条件下的反射和透射规律。结果表明:对于不同强度和厚度的充填节理,随着应力波频率的增加,其透射系数均逐渐降低,充填节理起到“滤波”作用;随着频率的增加,透射系数衰减速率先快后慢,并逐渐趋于稳定,且充填节理强度越低、宽度越大,该现象越明显。

In order to study the effect of filled joints on the transmission performances of stress waves at different frequencies,the joint models with the different thicknesses and strengthes are designed according to the characteristics of the filled joint.And the phenomenon of stress wave with different frequency normally incident on rock joint is simulated to study the law of reflection and transmission of stress wave under the different strength and width filling joints.The results show that for the filled joints with different strengths and thicknesses,its transmission coefficient decreases gradually with the increase of the frequency of the stress wave,and the filled joints serve to the "filtering" effect.With the increase of frequency,the attenuation rate of transmission coefficient is first fast and then slow,and gradually comes to stability.And the lower the strength of filled joint and the larger the width,the phenomenon is more obvious.