Research on Rapid Evaluation of Rock Mass Quality Based on Ultrasonic Borehole Imaging Technology and Fractal Method

<div>Images of drill core and hole wall (−1472.36 m to −1476.96 m).</div>

Advances in Materials Science and Engineering

Figure 2: Research on Rapid Evaluation of Rock Mass Quality Based on Ultrasonic Borehole Imaging Technology and Fractal Method 