Comparison study of three-component polarization analysis methods for seismic advanced detection in the roadway
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GMGDA 2019
Comparison study of three-component polarization analysis methods for seismic advanced detection in the roadway Lanying Huang 1 & Shengcheng Wang 1 & Xuejuan Song 1 Received: 18 September 2020 / Accepted: 13 November 2020 # Saudi Society for Geosciences 2020
Abstract Multicomponent seismic exploration makes up for the shortcomings of multiple solutions in conventional single-component seismic exploration for lithological identification and geological structure interpretation. Polarization analysis methods play a key role in the processing of multicomponent seismic data. However, when multiple types of waves are very close to each other, it is very difficult to characterize the polarization distribution of different waveforms using conventional time domain or timefrequency domain polarization analysis. In this paper, a time-frequency domain instantaneous polarization analysis method based on a time-frequency method of generalized S-transform is introduced. The instantaneous polarization parameters (polarization axis, polarizability, and planarization vector) can be calculated based on a time-frequency spectrum and instantaneous phase of multicomponent signal. The numerical simulation of three-component seismic advanced detection in the threedimensional space shows the following results: the diffracted P-wave from a fault breakpoint has the characteristics of narrow wave train and fast speed, which make it easy to be identified. Besides, it is an effective wave for polarization analysis due to its distinct polarization characteristics. Combining the advantages of the time-frequency domain analysis method, this method is more accurate in waveform identification and more reliable in fault identification. Besides, this method provides better results than the conventional time-domain polarization analysis method. Keywords Multicomponent seismic . Time-frequency analysis . Generalized S-transform . Polarization analysis
Introduction Due to the complex mining environment, working faces located in the deep ground with complex geological conditions exist widely in China’s coal mines. During the excavation of the mining roadway, hazard-prone zones that may lead to various mining accidents greatly affect the safety of coal mine production (Wang et al. 2019a). At present, there are many geophysical advanced detection techniques, including seismic, magnetic, and electrical methods (Xiong et al. 2018; Wang et al.
This article is part of the Topical Collection on Geological Modeling and Geospatial Data Analysis * Lanying Huang [email protected] * Shengcheng Wang [email protected] 1
School of Civil Engineering, Xuzhou University of Technology, Xuzhou 221018, China
2019b). Among them, the seismic wave method is less affected by disturbances, and it is the most suitable mean to predict structural anomalies, such as faults, in front of the roadway (Li et al. 2017). Compared with conventional singlecomponent seismic exploration, multicomponent seismic exploration makes up for the shortcomings of multiple solutions in conve
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