## 3 On-Site Blasting In Situ Experiment and Testing Analysis
### Analysis of Test Results  
The test results for every measuring point used during the blasting process were acquired by performing the aforementioned on-site blasting tests. Table 2 displays the vibration speed statistics obtained during the test. On a horizontal plane, the X direction denotes the direction toward the explosion source, the Y direction, the direction perpendicular to the X direction, and the Z direction, the direction against the horizontal plane. Note that the instrument has not been triggered if there is no response in Table 2. One possible explanation for this could be that the measuring point's instrument is not sensitive enough, which prevents it from triggering at low vibration speeds. The vibration velocity plots in the X, Y, and Z directions for measurement point V3 are shown in Figure 6.  
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \begin{tabular}{c} **Test** \\ **Sequence** \\ \end{tabular} & **Numbering** & \begin{tabular}{c} **High** \\ **Displacement/m** \\ \end{tabular} & \begin{tabular}{c} **Y-Direction** \\ \end{tabular} & \begin{tabular}{c} **PPV/cm\(\cdot\)s\({}^{-1}\)** \\ **Y-Direction** \\ \end{tabular} & \
\begin{tabular}{c} **Blasting** \\ **Z-Direction** \\ \end{tabular} &
\begin{tabular}{c} **Charge/kg** \\ **Distance/m** \\ \end{tabular} \\ \hline \multirow{7}{*}{I} & \multirow{7}{*}{V1} & \multirow{7}{*}{20.13} & 37.72 & 16.38 & 35.20 & 12.80 & 48 \\  & & 36.92 & 16.42 & 34.56 & 8.23 & 42 \\  & & 36.37 & 32.77 & 33.22 & 4.39 & 36 \\  & & 1.26 & & & 43.10 & 48 \\  & & 20.13 & 0.86 & & & 39.80 & 42 \\  & & 1.02 & & & 36.20 & 36 \\  & & 0.57 & 1.15 & 1.25 & 81.20 & 48 \\  & V3 & 50.50 & 0.35 & 0.63 & 0.66 & 78.90 & 42 \\  & & 0.38 & 0.74 & 0.71 & 75.10 & 36 \\ \hline \multirow{7}{*}{II} & \multirow{7}{*}{V5} & \multirow{7}{*}{14.01} & 6.85 & 12.70 & 34.41 & 14.20 & 48 \\  & & 9.55 & 13.53 & 28.73 & 10.10 & 42 \\  & & 15.29 & 27.91 & 37.36 & 6.30 & 36 \\  & & 2.36 & 1.50 & 2.83 & 36.00 & 48 \\  & & 14.01 & 0.16 & 0.50 & 1.32 & 32.30 & 42 \\  & & 2.30 & 0.72 & 2.70 & 28.80 & 36 \\  & & 0.68 & 0.61 & & 67.40 & 48 \\  & V6 & 33.65 & 0.50 & 0.48 & & 63.40 & 42 \\  & & 0.46 & 0.45 & & 60.60 & 36 \\ \hline \multirow{7}{*}{III} & \multirow{7}{*}{V8} & \multirow{7}{*}{9.40} & 12.24 & 16.40 & 35.20 & 13.40 & 48 \\  & & 13.40 & 16.84 & 34.12 & 9.90 & 42 \\  & & 18.36 & 22.63 & 38.54 & 6.10 & 36 \\  & & 7.04 & 6.14 & 10.07 & 23.30 & 48 \\  & & 4.09 & 4.06 & 3.93 & 19.60 & 42 \\  & & 7.54 & 9.45 & 10.2 & 16.30 & 36 \\  & &Table 2 makes clear that all of the other measuring points' primary vibration directions are in the Z direction, except the V1 measuring point's X direction. Every measurement point essentially satisfies the law that states that the peak vibration speed decreases with increasing blast center distance. The peak vibration velocity in the Z direction can exceed 30 cm\(\cdot\)s\({}^{-1}\) at measuring locations that are closer to the explosion source. The measuring point's peak vibration speed steadily drops as the blast center distance rises. The maximum vibration velocity at each measuring point is essentially less than 1 cm\(\cdot\)s\({}^{-1}\) when the blast center distance is greater than 60 m. Figure 6 displays the vibration velocity of the V3 measuring point. The figure makes it clear that the blasting vibration velocity peak resulted from the three blast holes detonating in succession. Wavebands of vibration occur once every second, are independent of one another, and the delay time is reasonable.