## 1 Introduction
The new spraying process and the latest equipment currently applied to dust control in mines were systematically introduced, and future research directions were established for the prevention of pneumoconiosis and the development of dust control measures. [PERSON] et al. [8] obtained a modified solid waste compound by modifying four industrial solid waste materials to improve their porosity and enhance their material loading capacity. Through the combination of modified solid waste and a variety of active powder materials, a new explosion suppressant using composite powder materials was developed via solvent crystallization and dry-ball milling. A discussion of the effect of explosion suppression and the cost feasibility of industrialization followed. It was found that this new suppressant has good efficacy on coal powder, mainly because active powder materials play a pyrolytic cooling role in the explosion, and the small particles resulting from the explosion of the modified solid waste contribute to extinguishing the flame. Although the laboratory cost of this device is relatively high, large-scale industrial applications can greatly reduce its cost. Thus, recent research on new explosion suppressants using composite powder materials provides new possibilities for the utilization of industrial solid waste. [PERSON] et al. [9] proposed a slag-based composite-powder anti-knock agent by modifying the waste incinerator slag and using NaHCO\({}_{3}\) as a carrier, via solvent-crystallization wet coating (WSCS). They conducted several experiments to verify its effect on the suppression of oil shale dust explosion, and an explosion suppressant using MSA-NaHCO\({}_{3}\) composite  
Figure 2: Schematic of the foam generator proposed by [PERSON] et al. [6]. powder was proposed to investigate the suppression mechanism (Figure 3). During the explosion process, the MSA-NaHCO\({}_{3}\) composite powder inhibits oil shale explosion by being wrapped with oil shale particles, thus acting as a coating layer, as well as by competing with oxygen for space to form a gas inert effect, reducing the temperature of the explosion environment for a cooling effect, etc. The inhibition in this new system also occurs in homogeneous and heterogeneous combustion through the explosive reaction of free radicals in multiple reactions to achieve chemical explosion suppression. This research demonstrated a new scheme for the recycling of waste incineration slag. [PERSON] et al. developed a mathematical model for the prediction of the average diameter of ultrasonic atomization nozzles for liquid media by designing a new system that can be applied to engineering sites [10]. Several orthogonal experiments were established using a spraying experimental platform to analyze the effects of air pressure, water pressure, and outlet diameter on nozzle atomization parameters, and a multivariate nonlinear analysis method was used to build the mathematical model. The experimental platform is illustrated in Figure 4. In order to verify the validity of the model, the error rate, defined as the difference between the predicted and experimental values of a nozzle at different air and water pressure rates, was evaluated. The experimental results were compared with the SMD values of the nozzle predicted by the mathematical model, and the average error rate was only 5%. Thus, their proposed mathematical model can calculate the droplet size of the nozzle for the application of ultrasonic atomization nozzles in engineering sites. Figure 3: Schematics showing the inhibition of oil shale dust explosion using the MSA-NaHCO\({}_{3}\) composite powder as an explosion inhibitor [9]. [PERSON] et al. [11] developed an eco-friendly road dust suppressant, which can control the dust escape rate by changing the water content, evaporation rate, and particle size ratio of road dust. Through the design of a series of monomer experiments, orthogonal experiments, and optimization experiments, the best ratio for the eco-friendly road dust suppressant was obtained.