# Proposal of a Transport Planning Model for the Removal of Quarry Stone Using a Simulation
## 3 Results and Discussion
### Simulation Experiment for the Removal of Quarry Stone from Two Loading Points  
Many experiments were performed on the created simulation model with a simulation time of 480 min. Some of the results are presented below, showing the results of the experiments performed for one combination of Variant 1 and Variant 2 and for a combination that does not meet the conditions below.  
\begin{table}
\begin{tabular}{c c} \hline \hline
**Block** & **Functions** \\ \hline \hline \multirow{4}{*}{
\begin{tabular}{c} **B.** \\ **B.** \\ **C.  
Experiment 6: Verification of the combination of points L2-L5 for Variant 1. During the simulation time, 110 dumpers were unloaded. The 63 dumpers were removed and the quarry stone was unloaded into the crusher in 245 min from the L2 loading point. The remaining 47 dumpers from loading point L5 were moved in 235 min. The results are summarized in Table 8.  
Experiment 7: Verification of the combination of points L3-L4 for Variant 2: A1. During the simulation time, 109 dumpers were unloaded. The 65 dumpers from the first loading point, L3, moved and unloaded the quarry stone into the crusher in 273 min. The remaining 44 dumpers from loading point L4 were moved in 207 min. The results are summarized in Table 9.  
Experiment 8 was carried out for Variant 2: A1, a combination of loading points L3-L5, as shown in Table 6. This combination of loading points turned out to be unsuitable. This experiment was carried out for the current state (Experiment 8A) and for changed input conditions (Experiment 8B and Experiment 8C), the task of which was to find out under what conditions it would be possible to reach the value of 109 unloaded dumpers.  
Experiment 8A: The task of this experiment was to confirm that it is impossible to fulfill the given requirements by combining quarry stone removal from points L3-L5 for Variant 2. Only 106 dumpers were unloaded during the simulation time, as shown in Table 7. The 65 dumpers from the L3 loading point were unloaded in 275 min, two minutes more than in Experiment 7. Only 41 dumpers out of 44 were taken and unloaded from the loading point L5, as shown in Figure 7.  
Experiment 8B: In this case, the simulation time was adjusted from 480 to 500 min. In this experiment, 109 dumpers were unloaded in 493 min. Based on this finding, this alternative is also applicable in operation, as there is a minimum extension of working time, in this case, 13 min. Several simulations of this experiment confirmed that the extension of working time was 8-14 min. For comparison, 65 dumpers from the L3 loading point were unloaded in 271 min.  
Experiment 8C: The task of this experiment was to find out the number of unloaded dumpers during the removal of quarry stone when changing an input parameter--the number of dumpers--from 3 to 4. A total of 134 dumpers were unloaded in a simulation time of 480 min, as shown in Figure 7; 65 dumpers moved the quarry stone from the L3 loading point to the crusher and unloaded it in 220 min. When we compare this time with the time from Experiment 8A, the time is reduced by 50 min, or by 18%. A total of 109 dumpers were unloaded in 383 min, and 69 dumpers were unloaded from point L5.  
Figure 7 shows the course of the number of unloaded dumpers for Experiment 8A and Experiment 8C. Figure 8 compares the results of Experiments 8A and 8C.