煤岩样单轴加载过程中次声波变化特征实验研究

发布时间：2018-03-16 20:44

本文选题：灾害预测　切入点：次声波　出处：《地球物理学进展》2017年03期 　论文类型：期刊论文

【摘要】：进行煤样、岩样加载过程中的次声波变化特征研究,对进行煤矿井下地质灾害次声波监测具有重要意义.采用自主研发的煤岩蠕变-渗流试验系统和CASI-ISM-2013高精度电容式次声传感器进行煤岩样单轴加载过程次声波测试.通过FIR滤波器进行滤波、软阈值去噪,然后采用傅里叶变换对加载过程中次声波的频谱、时频特征进行对比、分析.分析结果显示:在煤、岩样发生峰值破坏之前都有次声波异常突变;与煤样相比,岩样产生的次声波事件具有更强的事件集中性和频率宽泛性.该研究成果证实了煤矿井下地质灾害次声波预测的可行性,并为该方法的进一步研究提供参考.
[Abstract]:To study the characteristics of infrasonic wave variation in the loading process of coal and rock samples, It is of great significance to monitor the geological hazard in coal mine. The creep-percolation test system of coal and rock developed by ourselves and CASI-ISM-2013 high precision capacitive infrasound sensor are used to measure the infrasonic wave during uniaxial loading of coal and rock samples. Filter through FIR filter, Soft threshold de-noising, then Fourier transform is used to compare and analyze the spectrum and time-frequency characteristics of infrasonic waves during loading. The results show that there are abnormal changes in infrasonic waves before the peak value of coal and rock samples are destroyed, and compared with coal samples, The infrasonic events produced by rock samples have stronger centralization and wide frequency. The research results confirm the feasibility of infrasound prediction of geological hazards in coal mines and provide a reference for the further study of this method.
【作者单位】：河南省瓦斯地质与瓦斯治理省部共建国家重点实验室培育基地;河南理工大学安全科学与工程学院;煤炭安全生产河南省协同创新中心;
【基金】：国家自然科学基金(51574112) 教育部“创新团队发展计划”(IRT_16R22)联合资助
【分类号】：P694;TD315

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