## 3 Results and Discussion
### Analysis of Water Retention of Non-Ionic Fluorinated Dust Suppressants
#### 3.2.2 Analysis of Segmental Weight Loss Rate Variation of Non-Ionic Fluorinated Solutions  
The results presented in Figure 6 indicate that the water loss of the FS-30 solution at varying concentrations is not uniform across different time periods. However, the overall water loss at 60 h does not exhibit a significant change with an increase in concentration. The solution with the lowest concentration of 0.05% demonstrates the least total water loss (approximately 10.4070 g), with an average water loss rate of 0.17345 g/h. The 0.2%-concentration solution has the second-lowest total water loss (approximately 10.4306 g) and an average water loss rate of 0.17384 g/h. These observations suggest that the presence of specific molecular functional groups in the solutions may favorably interact with water molecules, leading to lower water loss. The analysis of water loss in different time periods also reveals that the periods 0-12 h and 24-36 h have higher water loss than 48-60 h. The specific concentrations associated with the lowest water loss in each time period (0-12 h, 12-24 h, 24-36 h, 36-48 h, and 48-60 h) highlight the potential influence of specific molecular functional groups on water retention at different stages. The interactions between these functional groups and water molecules, such as hydrogen bonding or hydrophilic interactions, can affect the stability and evaporation rate of the solution. Based  
Figure 5: Weight variation of coal dust at different concentrations and times in the presence of anionic fluorinated solutions. on a comprehensive analysis, the optimal concentration of the FS-30 solution for water retention is found to be 0.2%. Figure 6: Water loss of FS-30, FS-31, FS-34, FS-50 solution at different concentrations and different time periods. As shown in Figure 6b, the water loss of the FS-31 solution at different concentrations varies at different time periods, and the overall water loss at 60 h does not change significantly with increasing concentration. In terms of total water loss, the solution with the lowest total water loss concentration is 0.1%, with a total water loss of about 9.5284 g and an average water loss rate of 0.15881 g/h. The solution with 0.3% concentration is the next lowest, with a total water loss of about 10.1604 g and an average water loss rate of 0.16934 g/h. Through comparative analysis of water loss in each time period, it can be seen that 12-24 h is the time period with the least water loss in the solution. The solution concentration with the least water loss from 0 to 12 h is 0.07%, the solution concentration with the least water loss from 24 to 36 h is 0.3%, the solution concentration with the least water loss from 24 to 36 h is 0.3%, the solution concentration with the least water loss from 36 to 48 h is 0.1%, and the solution concentration with the least water loss from 48 to 60 h is 0.07%. The concentration of the FS-31 solution with the best water retention is 0.3%. Moreover, the water retention time can be controlled within 24 h to ensure better water retention performance. Based on the available data, the observed phenomena suggest that certain molecular functional groups in the FS-31 solution interact favorably with water molecules, leading to better water retention at specific concentrations and time periods. Figure 6c demonstrates that the water loss of the FS-34 solution at varying concentrations fluctuates during distinct time periods and the total water loss at 60 h does not exhibit a significant change with increasing concentration. The solution with the lowest concentration, 0.03%, has a total water loss of approximately 10.0909 g and an average water loss rate of 0.16818 g/h. In contrast, the solution with a concentration of 0.08% has the next-highest total water loss, approximately 10.3259 g, and an average water loss rate of 0.17210 g/h. These concentrations may contain molecular functional groups that interact favorably with water molecules and thus promote water retention.