Research Article

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

Table 2

Rock mass quality classification according to the fractal box dimension D of the hole wall image

D<2.05262.0526∼2.07232.0723∼2.1052.105∼2.1378>2.1378

Rock qualityVery goodGoodGeneralPoorVery poor