Automated microseismic event arrival picking and multichannel recognition and location

A new study about automatically picking microseismic event first arrival and high precision location was launched to process continuously microseismic data in a coal mine of Henan province.The study has two parts to introduce how to achieve the goal;①under the premise of the EMD method de-nosing,filtering waves,an improved energywindow method was put forward to future improve the precision of first arrival picking up;②to study the propagation characteristics about coal mine microseismic wave,explained the phenomenon about remote point reached first and arrival time disorder,obtained the empirical formula in different mediums by optimizing the verification blast design.To the end,through establish ' Amplitude-Time' method and ' Distance-Time' to reasonable and optimization location model to achieve the goal about precision location of the source.The result shows that the above method can effectively and quickly pick up the first arrival of microseismic wave,and reduce the error caused by artificially picking up and weaken the errors about waves propagating with different media,and the accuracy of source location was be improved.