## 4 Experimental Validation and Project Examples
Figure 7: Structural plane and borehole arrangement diagram. actual structural plane occurrence has some deviation from the preset value. Therefore, the practical parameters of the structural plane used for comparison are subject to the measured data after the sample removal. Figure 8 is the sample obtained from the actual pouring, from which the actual structural plane occurrence can be measured. The actual measured structural plane parameters are shown in Table 1.  
Six boreholes with different parameters were arranged in each sample, and the parameters of the boreholes are shown in Table 2. Let the angle between the borehole axis and the positive \(x\)-axis be \(\alpha_{i}\), and the angle between the positive \(z\)-axis be \(\beta_{i}\) (\(i\) is the borehole number, numbered 1, 2, 3, 4, 5, and 6, respectively). \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Structural Plane Actual Parameters** & **Move towards** & **Dip Direction** & **Inclination** \\ \hline \multirow{3}{*}{Sample 1} & Structural plane & East–west & & \\  & I & direction & \(100^{\circ}\) & \(16^{\circ}\) \\  & Structural plane & North–South & \(188^{\circ}\) & \(20^{\circ}\) \\  & II & direction & & \\ \hline \multirow{3}{*}{Sample 2} & Structural plane & East–west & & \\  & I & direction & \(91^{\circ}\) & \(12^{\circ}\) \\ \cline{1-1}  & Structural plane & North–South & \(178^{\circ}\) & \(24^{\circ}\) \\ \cline{1-1}  & II & direction & & \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Actual measured structural plane parameters. Figure 8: Structural plane layout in sample 1. (**a**) Main view of the sample. (**b**) Top view of the sample. (**c**) Front view of the sample. (**d**) Right view of the sample. Before the beginning of the digital panoramic borehole camera, use the compass to adjust the orientation. Until the \(x\)-axis of the sample points to the due north, we recorded the orientation. Finally, the borehole inner wall image was acquired with the borehole camera (Figure 9). Due to the roughness and undulation angle of the structural plane, it is not absolutely in the form of a sine curve in the borehole image expansion diagram after the structural plane cuts the borehole wall (Figure 10). In the analysis of borehole images, the sine curve is usually obtained by three-point fitting, and the yield information obtained after processing may deviate from the actual value. In addition, the three-point fitting process is intensely subjective, and the results are not conducive to subsequent analysis. Therefore, when processing the borehole images, the image processing tool is used to filter and detect the images' edges, then extract the structural plane information from the generated borehole images. Fit them with MATLAB to obtain the sinusoidal curves, and convert them into yield information. The process is shown in Figure 11. The results obtained in this way avoid the artificial point taking in the fitting process, and the results are more objective than before. The two samples were arranged with six boreholes in the experiment, in which the structural plane I was both penetrated by six boreholes and four boreholes penetrated the structural plane II, so each sample corresponded to 10 coordinate points. The results of the coordinate points obtained by processing are shown in Tables 3 and 4 below.