陈冠,李启月,刘小雄,吴正宇,马举

• 1:中南大学资源与安全工程学院

摘要(Abstract)：

针对液态CO_2相变破岩,设计振动信号监测试验,基于小波包变换分析振动信号能量分布规律。结果表明:液态CO2相变破岩振动信号主振频带与振动信号方向及传播距离相关性较小,基本位于0~4 Hz子频带,但主振频率对应能量分布百分比随着传播距离增加逐渐降低。随传播距离的增加,垂向振动信号高频段能量百分比逐渐增加,低频段能量百分比逐渐降低,且在中高频附近出现与主振频带对应能量百分比逐渐接近的"子中心"频带。同一测点不同方向频率能量分布百分比在0~100 Hz频带存在一定差异,但在其他频域内基本一致。

关键词(KeyWords)： 液态CO2;相变破岩;振动;能量分布;小波包分析

Abstract:

Keywords:

基金项目(Foundation): 中南大学中央高校基本科研业务费专项资金资助(502211739);; 国家自然科学基金(51374243、41372278)

作者(Author): 陈冠,李启月,刘小雄,吴正宇,马举

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