通过对烘干和饱水状态下的大理岩进行纵波波速测试 ,发现饱水后的大理岩波速将发生变化并表现出明显的分散性 ,波速的各向异性也被弱化 ,长期浸泡后 ,大理岩的波速还可能会降低。引入绕射系数 k,对 Wyllie公式加以完善 ,从理论上较好地给予了解释 Through the longitudinal and longitudinal wave velocity tests on the marble under the condition of drying and saturated water, it is found that the marble wave velocity after saturated water will change and show obvious dispersibility, and the anisotropy of wave velocity is also weakened. After long-term immersion, Rock velocity may also decrease. By introducing the diffraction coefficient k, the Wyllie formula is improved and the theory is better explained