煤田地质与勘探
煤田地質與勘探
매전지질여감탐
COAL GEOLOGY & EXPLORATION
2014年
1期
72-75
,共4页
微地震%初至拾取%滤波%AIC%Hankel矩阵
微地震%初至拾取%濾波%AIC%Hankel矩陣
미지진%초지습취%려파%AIC%Hankel구진
microseismic%picking of first arrival time%filtering%Akaike information criterion%Hankel matrix
针对微地震信号能量弱、信噪比偏低的问题，将基于Hankel矩阵的滤波算法引入微地震信号处理中，用于衰减微地震信号中的随机噪音，提高微地震事件波至时间的拾取精度；采用Akaike信息准则(AIC)自动选取信号特征值，能适用于微地震事件的实时自动处理。与常规滤波方法相比，该方法在压制噪音的同时保护了微地震信号，其有效性和实用性在模型数据和实际微地震数据测试中得到了验证。
針對微地震信號能量弱、信譟比偏低的問題，將基于Hankel矩陣的濾波算法引入微地震信號處理中，用于衰減微地震信號中的隨機譟音，提高微地震事件波至時間的拾取精度；採用Akaike信息準則(AIC)自動選取信號特徵值，能適用于微地震事件的實時自動處理。與常規濾波方法相比，該方法在壓製譟音的同時保護瞭微地震信號，其有效性和實用性在模型數據和實際微地震數據測試中得到瞭驗證。
침대미지진신호능량약、신조비편저적문제，장기우Hankel구진적려파산법인입미지진신호처리중，용우쇠감미지진신호중적수궤조음，제고미지진사건파지시간적습취정도；채용Akaike신식준칙(AIC)자동선취신호특정치，능괄용우미지진사건적실시자동처리。여상규려파방법상비，해방법재압제조음적동시보호료미지진신호，기유효성화실용성재모형수거화실제미지진수거측시중득도료험증。
Aiming at the problems of weak enengy of microseismic signals and low SNR a filtering algorithm based on Hankel matrix is introduced into microseismic data processing, it can attenuate random noise in microseismic data, and improve the picking accuracy of arrival of microseismic events;characteristic values of signals are automatically selected by using Akaike information criterion (AIC), so it can be applied to real time auto-processing of microseismic monitoring. The filtering method has better fidelity of the signal while attenuating the random noise, compared with the traditional methods. Synthetic data and real field data verify the validity and practicability of the method.
