Accuracy analysis of media heterogeneity characteristics and signal master frequency on image reconstruction

Abstract:
The accurate positioning of dielectric anomalies plays an important role in aerospace, mineral extraction and engineering construction. In this paper, we mainly use the laminar imaging method to locate the dielectric anomalies. We use the cross-hole seismic laminar imaging method to establish an observation system, take the source frequency and dielectric anomalies as the research object, and use numerical simulation as the research method to analyze the laminar imaging of high-speed anomalies and low-velocity anomalies at frequencies of 400Hz, 600Hz and 800Hz. The numerical simulation results show that the spatial distribution of the anomalies is more accurate when the frequency is 800Hz; for the high-speed anomalies, the boundary convergence of the anomalies is higher as the frequency increases, and the inversion accuracy is higher when the frequency is 800Hz; for the low-velocity anomalies, the longitudinal resolution and transverse resolution increase as the frequency increases, and the longitudinal resolution is smaller than the transverse resolution; at the same frequency, the high-speed The imaging effect of high-speed anomalies is better than that of low-velocity anomalies at the same frequency, indicating that high-speed anomalies are easier to locate in geological exploration.