Research on mine earthquake location method based on wavelet soft threshold filtering

In relation to the problems of time variability and the complexity of mine earthquake signal while blasting mining, a kind of wavelet soft threshold filter method is proposed. In this paper, the signal before mine earthquake wave arrival time is considered as noise, and is used to determine the wavelet threshold. Then Db4 wavelet is chosen as the wavelet basis function for the wavelet soft threshold filtering. The experimental results show that the noise can be filtered out effectively, and this ensures that the mine earthquake signals at the arrival time is smooth and monotonous, which improves the accuracy of the positioning algorithm.