摘要
通过对跃进煤矿ARAMIS微震监测系统监测到的微震波形信号进行处理分析,得到冲击矿压发生前后的功率谱演变特征,结果表明:冲击前、后微震信号功率谱值较低,功率谱大值对应频率主要为50～150 Hz,单位频率段上功率谱变化量较大;冲击时功率谱在各频率段的分布较均匀,功率谱值增高,低频和高频段对应的功率谱值增幅较大,单位频率段上功率谱变化量较小。
Through processing and analyzing of microseism signal monitored by ARAMIS microseism monitoring system in Yuejin Coal Mine, the paper obtains development laws of power spectrum before and after rock burst. The results present that the power spectrum value of microseism signal is lower before and after rock burst with the corresponding big value distributed at the frequency range of 50 to 150 Hz, while the value variation at a same frequency range length is higher;when rock burst happens, the power spectrum is evenly distributed at different frequency ranges and the value, especially the corresponding with higher and lower frequency, increases while the value variation at the same frequency range length decreases.
出处
《煤矿安全》
CAS
北大核心
2013年第11期50-52,共3页
Safety in Coal Mines
