摘要
微震信号能反映煤岩体损伤破坏程度,可作为冲击矿压监测及预警依据。基于快速傅立叶变换对微震信号进行时域与频域转换分析,揭示了不同能量级别微震信号及频谱特征差异。研究表明:不同能级下的微震信号波形和频谱特征存在较大差异,高能量矿震信号振幅较大,频率较低,且分布相对集中,震动持续时间长,衰减较慢。研究不同能量级别的微震信号频谱特征为深入揭示冲击矿压能量释放机理提供了参考。
As an important parameter of the damage in coal-rock mass, the microseismic signal can be applied in the early warning and forecasting of a rock burst. The microseismic signal is transformed from a speed-time mode into an amplitude-frequency mode based on the Fourier transform and the signal characteristics under different energy levels are investigated. Result shows that the microseismic waveform and frequency spectrum are different under different energy levels, the higher energy micro- seismic signal has a larger amplitude, lower frequency, more centralized spectrum and longer ＂vibrating period. Focusing on the frequency spectrum characteristics of microseismic signal with different energies, this study is expected to explain the rock burst mechanism.
作者
刘海顺
井广成
谢龙
侯龙
窦林名
吕长国
陈兴和
LIU Haishun1, JING Guangcheng1, XIE Long1, HOU Long1, DOU Linming1, LYU Changguo1, CHEN Xinghe2(1.School of Physical Science and Technology, State Key Laboratory of Coal Resources and Safe Mining China University of Mining ＆ Technology, Xuzhou, Jiangsu 221116, China; 2. PangzhuangMine, Xuzhou Coal Mining Group, Xuzhou, Jiangsu 221141, Chin)
出处
《采矿与安全工程学报》
EI
CSCD
北大核心
2018年第2期316-323,共8页
Journal of Mining & Safety Engineering
基金
国家重点基础研究发展计划(973)项目(2010CB226805)
中央高校基本科研业务费项目(2014ZDPY35)
关键词
冲击矿压
微震
傅立叶变换
能量
频谱分析
rock burst
microseismic~ Fourier transform~ energy~ spectral analysis
