The substantial microseismic monitoring data bring many difficulties to the long distance wireless real-time transmission of data and,what is more,take up a lot of disk space.In this paper,using adaptive threshold STA/LTA algorithm,the authors select appropriate characteristic function and automatically,quickly and accurately identify effective micro-seismic signal from the large quantities of monitoring data.Then,the method on the paper accurately determines the start and end time of the effective micro-seismic signal complete waveform,and removes large quantities of redundant data by completely intercepting valid signal,so that the original data are reduced to 20%.Finally,the monitoring data compression ratio attains 10:1 by using STEIM2 algorithm compress data intercepted.
[1] 王喜珍.小波变换在地震数据压缩和震相到时拾取中的应用研究[D]. 北京:中国地震局地球物理研究所,2004:29-31.[2] Zhang H J,Thruber C,Rowe C.Automatic P-wave arrival detection and picking with multiscale wavelet analysis for single-component recording[J].Bulletin of the Seimological Society of America,2003,95(5):1904-1912.[3] Chen Z,Stewart R R.A multiwindow algorithm for real-time automatic detection and picking of P-phases of microseismic events[C]//Houston:SEG 2005 Annual Meeting:1288-1291.[4] Aminzadeh F,Maity D,Tafti T A,et al.Artifiicial neural network based autopicker for micro-earthquake data[C]//San Antonio:SEG 2011 Annual Meeting:1623-1626.[5] Massa M,Ferretti G,Spallarossa D,et al.Improving automatic location procedure by waveform similarity analysis:An application in the South Western Alps (Italy)[J].Phys Earth Planet Interiors,2006,154:18-29.[6] Akram J,Eaton D.Adaptive microseismic event detection and automatic time picking[J]. GeoConvention,2012:1-5.[7] 陈运泰,吴忠良,王培德,等.数字地震学[M].北京:地震出版社,2000.[8] Tselentis G A,Martakis N,Paraskevopo-ulos P,et al.A method for microseismic event detection and P-phase picking[C]//San Antonio:SEG 2011 Annual Meeting:1638-1642.[9] Stevenson R.Microearthquakes at Flathead Lake,Montana:A study using automatic earthquake processing[J]. Bull.Seism.Soc.Am.,1976,66:61-79.[10] Allen R.Automatic earthquake recognition and timing from single trace[J]. Bull.Seism.Soc.Am.,1978,68:1521-1532.[11] 刘超,唐春安,薛俊华,等.煤岩体微震事件属性识别与标定综合分析方法[J]. 采矿与安全工程学报,2011,28(1):62-65.
