## 3 Results and Discussion
### Comparison of Impact Using MSIS-2017  
For the assessment of seismic impacts of mining tremors, which are sporadic events, the Mining Seismic Intensity Scales (MSIS) are applied. The empirical-measurement-based MSIS-2017 is used to monitor and evaluate the effects of mining-induced events on surface structures and the perception of vibrations by people. According to this scale, the effects of events are distinguished, taking into account the type of building and its technical condition. It also includes an assessment of the dynamic resistance of buildings, which allows determining the level of ground vibrations that is safe for structures, guaranteeing the absence of damage. It should be noted that any vibration measurements should be performed on the ground or in buildings where the transition function from the subsoil to the building foundation is close to unity, for the frequency range from 1 Hz to 10 Hz. Typically, these are small single-family buildings. In the case of installations in buildings, it is permissible to install vibration receivers directly above the foundation to the load-bearing wall, in a rigid joint of the structure. The parameters used to assess the intensity of vibrations in the MSIS-2017 are as follows [11; 45; 47; 53]:  
Maximum amplitude of horizontal vibration velocity (PGV\({}_{\rm Hmax}\)), determined as the resultant of the horizontal maximum length vector. \[{\rm PGV}_{\rm Hmax}={\rm max}_{\rm t}\Big{(}\sqrt{{\rm v}_{\rm x}^{2}({\rm t })+{\rm v}_{\rm y}^{2}({\rm t})}\,\Big{)}, \tag{1}\]  
\({\rm v}_{\rm x}({\rm t})\)--seismogram of the horizontal \({\rm x}\) component of vibration velocity;  
\({\rm v}_{\rm y}({\rm t})\)--seismogram of the horizontal \({\rm y}\) component of vibration velocity. Arias intensity:  
\[{\rm I}_{\rm v}({\rm t}_{\rm k})=\int_{0}^{{\rm t}_{\rm k}}\big{(}{\rm v}_{\rm x }^{2}({\rm t})+{\rm v}_{\rm y}^{2}({\rm t})\big{)}{\rm dt}, \tag{2}\]  
\({\rm t}_{\rm k}\)--a variable describing the dependence of intensity on time. \begin{table}
\begin{tabular}{c c c c} \hline \hline \multirow{2}{*}{**Central Frequency of**} & \multicolumn{3}{c}{**Value of the VPIB Indicator**} \\ \cline{2-3}  & **Line A of the** & **Blasting Works** & **Mining Tremors in the** \\  & **SWD-I Scale** & **in Open-Pit Mine** & **Underground Mine** \\ \hline
3.16 & 1.00 & 0.02 & 0.19 \\ \hline
3.98 & 1.00 & 0.06 & 0.72 \\ \hline
5.01 & 1.00 & 0.44 & 1.48 \\ \hline
6.31 & 1.00 & 0.90 & 2.10 \\ \hline
7.94 & 1.00 & **1.09** & 1.95 \\ \hline
10.00 & 1.00 & 0.18 & **3.59** \\ \hline
12.59 & 1.00 &Duration of the horizontal vibration velocity component (\(\rm{t_{HV}}\)), which represents the time interval between those time moments when the Arias intensity reaches 5% and 95% of its value:  
\[\rm{t_{HV}=t_{2}-t_{1}} \tag{3}\]  
\(\rm{t_{1}}\)--time after which (2) reaches 5% of the value of this integral, calculated for the entire recorded vibration record;  
\(\rm{t_{2}}\)--time after which (2) reaches 95% of the value of this integral, calculated for the entire recorded vibration record. The variability of the horizontal vibration vector over time and the calculation of the vibration duration (\(t_{HV}\)) for the analyzed events are presented in Figures 18 and 19. A comparison of vibration parameters for blasting and mining tremors, calculated for the assessment of their impact using the MSIS, is presented in Table 4.  
From Figures 18 and 19 and the data in Table 4, it can be observed that vibrations induced during blasting works have over ten times lower Arias intensity, shorter duration, and a significantly smaller horizontal vibration velocity vector. The results of the analysis (based on data from Table 4) are plotted on the MSIS-2017 (Figure 20).