岩石中诱发脉冲的声发射场的频谱分析及应用

本文用光弹性的方法记录岩石中诱发脉冲的自然振动场，并做频谱分析，这种方法可以测量波动的应力，用以显示在有限尺寸的非均匀固体或岩层结构中，由于破裂成核结构的形成而激发的声发射频谱。地声频谱方法的一个应用，是探测宏观破碎断裂面或不同岩性的断裂面。本文的结果，可导致对不同频率波的层析成像；可对矿山的岩体断层定位作出贡献，从而有助于预测矿井的灾害。在实验室中岩层破裂时声发射系列的频谱模式，可能转用于天然强震系列频谱作模拟类比。

Spectral Analysis of Pulse-induced Acoustic Field in Rocks and Its Applications

In this work,the frequency analysis of the natural vibrations of a solid of finite dimensionsregarded as the response to the pulse action has been carried out.The vibrations were registered by thephotoelasticity method allowing one to determine the mechanical stress in the wave.The obatainedinformation about the natural vibrational field was used for the interpretation of the acoustic emissionspectra excited during cracks uncleation in the in homogeneous rock formation.The main applications ofgeo-acoustic spectral methods is to detect massif discontinuities formed by macro-cracks or byboundaries of rocks of different lithology,ist is useful for localizing these discontinuities and is actual fordamage prediction in mines.This results may guide to get the imaging in rocks with various frequency,and getting some comparison with the seismic spectra for natural earthquakes.