Abstract:
To address the challenge of low precision in coalfield seismic exploration caused by intense surface incision and severe seismic wave attenuation in the Loess Tableland area, this study conducts a synchronous comparative experiment involving 60 Hz moving-coil geophones, 10 Hz SmartSolo nodal geophones, and DSU-1 fully digital geophones. Under unified acquisition parameters, multidimensional quantitative evaluations based on shot records, spectral characteristics, and signal-to-noise ratios (SNR) demonstrate that: the 60 Hz geophone suffers from severe low-frequency attenuation and fails to meet deep exploration requirements; the 10 Hz SmartSolo nodal geophone provides abundant low-frequency energy but lacks high-frequency details; leveraging advantages such as a 5–100 Hz wide frequency bandwidth, zero-phase response, and a high dynamic range exceeding 140 dB, the DSU-1 fully digital geophone achieves optimal wavefield fidelity, with an average SNR of 8.5 dB. Furthermore, it yields imaging profiles characterized by continuous event tracking and high resolution, significantly enhancing the characterization of coal seams and concealed structures. This research establishes a geophone applicability evaluation system and proposes a geophone selection scheme for high-precision coalfield seismic exploration in the Loess Tableland, providing robust technical support for exploration in similar complex regions.