岩石受力状态对弹性波传播速度影响的初步研究

岩石所受的三向应力状态对其弹性波传播性质有一定的影响，此认识为所做的以泥质砂岩、泥岩和硅质胶结的坚硬砂岩为试样的实验所证实。为保证岩石中存在微隙，对部分试样还作了高温预热处理。实验结果表明，泥质砂岩和泥岩的Ｖ＿ｐ／Ｖ＿ｓ值几乎保持不变，但坚硬砂岩的Ｖ＿ｐ／Ｖ＿ｓ值曲线却在应力达破坏荷载的９０％左右时出现下凹现象，经热处理的硬砂岩的这一下凹现象则更突出。

Experiment on Influence of Stress States on Elastic Waves Velocity

The influence of triaxiale stress states on the elastic waves velocities of clayey sandstone,claystone and hard siliceous sandstone has been determined by experiments.Some samples are previ-ously treated with heat to intendify crack prodution.Claystone and clayey sandstone show hardly anychanges in the V_p/V_s ratio.For siliceous sandstone there is a minimum in the ratio of the wave veloci-ties at sbout 90%of the failure stress.This minimum especially present in thesiliceous santone previ-ously treated with heat.