## 4 Case Analysis
### Comprehensive Analysis
At the same time, the width of rock mass fracture cannot be accurately given. In the exploration of boreholes by using directional acoustic scanning technology, the karst caves through the boreholes can be effectively found and measured, the buried depth of the karst caves can be determined and the geometric shape of the karst caves can be measured. However, it is difficult to obtain the rock mass structure of the borehole wall and the surrounding rock mass structure of the borehole only by relying on the borehole acoustic scanning system. Therefore, by fusing the multi-source data of three kinds of boreholes, they can complement and improve each other, and improve the comprehensive interpretation accuracy. Through the method described in this paper, combined with the analysis of the crack extension range, the visualization results of the adverse geological bodies in the karst  
Figure 16: Comprehensive interpretation of borehole radar data. (**a**) Borehole ZK I. (**b**) Borehole ZK II. (**c**) Borehole ZK III. development area of the three boreholes are shown in Figure 17. Figure 17a is the unfilled vertical view, in which the cracks are represented by circular lines. Figure 17b shows the unfilled E-W orientation, in which the cracks are represented by disk lines. Figure 17c shows the unfilled N-S orientation, in which the cracks are represented by a disc filled with color. Figure 17d shows the filled Side view, in which the cracks are represented by colored disks. Figure 17e shows the filled E-W orientation, in which the cracks are represented by colored filled discs. Figure 17f shows the filled N-S orientation, in which the cracks are represented by colored filled disks. The \"Unfilled\" in Figure 17 refers to the use of circular curves to represent cracks. The \"Filled\" in Figure 17 refers to the disc surface filled with different colors to represent the cracks. It can be seen from Figure 17 that the visualization results of the adverse geological bodies in the karst development area of the three boreholes can not only present the texture characteristics of the borehole wall, but also realize the three-dimensional visualization of the structure of the adverse geological bodies between the three boreholes. This is mainly because the borehole optical imaging technology in the multi-source borehole data can clearly see the distribution characteristics of the structural plane of the borehole rock mass and the texture characteristics of the rock. At the same time, the geometric parameter information such as the occurrence, gap width and spacing of the structural plane can also be obtained. The borehole directional acoustic scanning technology in multi-source borehole data can effectively find and measure the karst cave through the borehole, and realize the judgment of the buried depth of the karst cave and the measurement of the geometric shape of the karst cave. At the same time, it can also effectively reflect the distribution characteristics of the near-field rock mass structure of the borehole-surrounding rock. The borehole radar technology in multi-source borehole data can effectively identify the possible abnormal rock mass structures around the borehole, such as karst caves and fractures. On the basis of multi-source borehole data, the comprehensive interpretation and  
Figure 17: Spatial visualization of adverse geological bodies. (**a**) Unfilled vertical view. (**b**) Unfilled E–W orientation. (**c**) Unfilled N–S orientation. (**d**) Filled side view. (**e**) Filled E–W orientation. (**f**) Filled N–S orientation. analysis method proposed in this paper can realize the effective fusion and interpretation of multi-source data, and realize the three-dimensional visualization of adverse geological bodies in karst development areas. Through comparison with other geophysical prospecting methods and geological data, it is found that the detection results are more accurate and the detection efficiency is higher.