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岩石材料可视为声波的天然低通滤波器 ,声波在不同力学性质岩石材料中传播时 ,由于岩石对声波吸收程度不等因而高频声波滤除状况也不同。接收波中频率丰富程度与岩石的力学性质密切相关 ,岩石力学强度愈高 ,声谱中高频成分就愈丰富。反之 ,声谱中主要为低频 ,高频分量因衰减而缺失。实验采用全数字化DB4型多波参数分析仪和计算机 ,对波形数据进行FFT分析 ,通过接收谱和频率响应的特征来研究岩石的力学性质。声衰减研究可为岩石、岩体强度和综合评价提供更多、更可靠的信息 ,是解决工程地质风化岩问题研究的一种可行方法
Rock material can be regarded as a natural low-pass filter of sound waves. When sound waves propagate in rock materials with different mechanical properties, the situation of high-frequency sound wave filtering is also different due to rock’s absorption of sound waves. The abundance of frequency in the receiving wave is closely related to the mechanical properties of the rock. The higher the mechanical strength of the rock, the more abundant the high-frequency components of the sound spectrum. Conversely, the main low frequency sound spectrum, high frequency components due to attenuation and missing. The experiment uses the all-digital DB4 multi-wave parameter analyzer and computer to analyze the waveform data by FFT, and study the mechanical properties of rock by the characteristics of receiving spectrum and frequency response. Sound attenuation research can provide more and more reliable information for rock, rock mass strength and comprehensive evaluation, and is a feasible method to solve the problem of engineering geological weathering rock