Study on noise attenuation of seismic while mining

In view of the closure of the environments and the high requirements of safe production of underground coal mine, the explosive source has many limitations in the operation of seismic exploration of coal mine, and the coal shearer as the source can avoid many inherent shortcomings of the source of explosives, has the advantage of real-time detection of the internal structure and the stress of the working face without affecting the normal operation of the mining face. However, as the energy generated by the shearer is much smaller than that of the explosive source, the quality of the collected signal is usually affected by the environmental noise. Through the analysis of a large number of field data, it is found that most energy in the noise are single-frequency noise and random noise, which seriously affects the detection accuracy. In order to improve the signal-to-noise ratio of seismic data while mining, a method of simultaneous attenuation of single frequency noise and random noise was proposed. Firstly, based on the cross-correlation technology, the single frequency noise was attenuated while the conventional shot gathers records were constructed, and then the random and residual single frequency noise were attenuated by wavelet transform. Simulation data and field data verified that the proposed method can enhance to a great extent SNR of signals.