Research and Application of Anchor Hole Detection Technology Based on Acoustic Synthetic Aperture Imaging

An anchor hole imaging method based on acoustic synthetic aperture technology was proposed to address the issue of insufficient resolution in traditional acoustic borehole imaging techniques, aiming to improve the resolution of internal borehole detection. High-resolution synthetic aperture imaging technology was employed to comprehensively process a large number of cross-sectional scan echo signals, enhancing effective reflection signals while suppressing interference signals, thereby making the echoes from characteristic areas of the rock wall more prominent. Based on this, the acoustic amplitude and acoustic time parameters of the scanned cross-sectional echo signals were extracted. By integrating the characteristics of acoustic amplitude and acoustic velocity, a correlation-based reconstruction criterion for ultrasonic borehole images was proposed. Suitable imaging data points were selected, and by superimposing detection data from different depths, a reconstructed borehole image with more distinct regional features was generated. Practical engineering application results demonstrated that the proposed method exhibits good feasibility and accuracy.