中文摘要：

为了研究煤样破坏前兆次声波预测的可行性.采用理论分析与实验室测试相结合的方法.首先,对大量文献进行查阅、分析,从理论上证明了进行次声波预测的可行性.然后,采用自主研发的煤岩渗流装置进行了模拟测试,采用小波阈值去噪、巴特沃斯滤波器对测试结果进行了去噪、滤波处理.并采用时频分析、频谱分析等波形分析方法和分形维数等参数分析方法进行了分析.分析结果显示：在煤样发生峰值破坏前均有异于之前次声波频率的异常次声波产生;并且,随着加载进行,分形维数值呈整体波动性增加,在破坏前有一个相对的稳定期.利用这些特征可以进行破坏前兆的预测,并且具有较好的预测效果.说明了次声波预测方法进行煤样破坏预测的可行性,为煤矿地质灾害预测提供了一种新方法.

英文摘要：

In order to study the feasibility of damage prediction in coal sample.The method of theoretical analysis and laboratory testing were used for the analysis.First of all,a large number of literatures were consulted and analyzed,and the feasibility of the prediction of infrasound was proved theoretically.Then,the independent research and development of coal rock seepage device was used to carry out simulation test.Wavelet threshold and Butterworth filter were used to denoise and filter the test results.The waveform analysis method of time frequency analysis and frequency spectrum analysis,and the parameter analysis method of fractal dimension were used to analyze the results.The analyzed results showed that：there was abnormal infrasound,which was different from the previous infrasound in frequency before the coal samples were destroyed.At the same time,with the loading,the fractal dimension value increases with the increase of volatility,and there is a relatively stable period before destruction.This features can be used to predict the damage precursor of coal samples,and the forecast effect was very good.This showed the feasibility of prediction of geological hazards in coal mine by infrasound,which provides a new method for the prediction of the geological hazards in coal mine.