摘要
如何识别不同微震信号,尤其是快速识别冲击危险信号,以便及时采取解危措施,是微震监测中亟待解决的问题.以三河尖矿9202采面过上覆煤柱高应力区为背景,通过微震信号的时-频分析技术,总结提炼了不同微震信号的重要波形特征.研究表明:不同微震信号在频率特征、信号持续时间、释放能量等多方面都存在区别,冲击矿压波形有震幅大、衰减快、尾波较发育、频带分布较窄等重要特征.通过对微震信号的特征分析,有助于深入揭示微震监测的震源机理,进一步推动冲击矿压的预测预报工作.
In an high stressed area, How to identify different micro-seismic monitoring signals, especially how to recognize those dangerous signals fleetly and take measures in time is an urgent problem to besolved. Based on the instance of No. 9202 working face across the upper remained coal pillar in Sanhejian Mine, the character of signals caused by different hypocenters had been summarized and abstracted by using the time-frequency analysis method. The results show that the signals are different in frequency, duration, released energy, and so on and the waveform of rock burst is characterized by big seismic amplitude, fast taperoff, developed tailwave and narrowly distributed bandwidth. This result is useful in promoting the forecast of rock burst.
出处
《采矿与安全工程学报》
EI
北大核心
2007年第2期146-149,154,共5页
Journal of Mining & Safety Engineering
基金
国家自然科学基金项目(50490273
50474068
50074030)
国家重点基础研究发展规划(973)项目(2005CB221504)
教育部博士点基金项目(20030290017)
关键词
冲击矿压
微震
预测预报
动力灾害
幅频特征
时-频分析
rock burst
microseism
forecast
dynamic catastrophe
amplitude-frequency character
time-frequency analysis
