Dust Suppression Research Articles

Study on the influence of airflow disturbance on spray atomization

The droplet distribution characteristics are one of the key factors that determine the dust suppression effect of spray system. In order to study the droplet distribution characteristics under different working conditions, the influence mechanism of wind speed and spray angle on droplet distribution characteristics was studied based on Fluent software. The results show that the increase of wind speed and spray angle will increase the lateral momentum of droplets, resulting in the increase of longitudinal height and lateral length of spray belt. The change of spray angle causes the change of the distribution ratio of transverse momentum and longitudinal momentum of droplets. With the increase of spray angle, the transverse momentum of droplets increases and the longitudinal momentum decreases, resulting in the increase of the longitudinal height and length of spray belt. In engineering practice, attention should be paid to the coordinated control of nozzle height, spray angle and airflow speed.

Socioeconomic and Environmental Impacts of Quarrying in Nigeria: A Comprehensive Review of Sustainable Quarrying Practices and Innovative Technologies

The quarrying industry in Nigeria has far-reaching socioeconomic and environmental implications that demand careful consideration of sustainable practices and innovative technologies. This comprehensive review delves into the multifaceted impacts of quarrying on local communities and the environment, highlighting challenges such as habitat destruction, air, noise,water pollution, environmental degradation, and socioeconomic disparities. Furthermore, it accesses current sustainable quarrying practices and innovative technologies to mitigate these impacts and improve efficiency. To address these challenges, this paper also emphasizes the importance of implementing robust policies and regulations governing quarrying activities in Nigeria. Through analysis of real-world examples, case studies, and existing literature, this review uncovers promising solutions that can enhance quarrying operations’ sustainability and environmental performance in Nigeria and worldwide. This paper unveils that, while quarrying is an important industry in Nigeria, it is critical to ensure it is carried out sustainably and responsibly. This can be achieved through improved regulations, strengthening sustainable quarrying practices, conducting thorough environmental impact assessments, establishing buffer zones around quarries, enforcing stricter pollution control measures, stakeholder engagement, and adoption of new technologies such as advanced blasting techniques, dust suppression technologies, automation and robotics machinery, water recycling, and treatment systems, waste recycling management, and reforestation and restoration techniques.It is evident that there are gaps and inconsistencies in Nigeria’s policy and regulatory framework, and there is a lack of research on the effective implementation of sustainable practices and new technologies. Therefore, further research is recommended on areas such as the lasting impact of sustainable practices, the potential of new technologies, and the enhancement of policy and regulatory frameworks to improve the sustainability and efficiency of quarrying operations in Nigeria.

Ecological study of atmospheric air on the territory of the Trans-Baikal Territory “Charsky territorial mountain-metallurgical complex”

The article describes the impact on the atmospheric air, which are acute negative nature of mining enterprises and their infrastructure industries of the North of the Trans-Baikal Territory, which actualizes this problem in society. The object of the study is the territory of the advanced development of the Trans-Baikal region “Charsky territorial mountain-metallurgical complex”. The subject of the study is the current ecological state of atmospheric air. The aim of the study is to analyse the negative impacts of mining production, as well as the accompanying infrastructural factors that have a complex impact on the ecology of the atmospheric air in the northern territory. The research tasks are reduced to the identification of sources and types of atmospheric air pollution during the quarrying of ore, its enrichment, and the impact of the supporting industries of mining industrial production. The methodological basis of the study is integrated, structural, factological principles and approaches. The article uses general methods of research (analysis, synthesis, generalization), as well as private-scientific-factor analysis, which means the methodology of complex and system study of interaction of factors on the size of the effective indicators and others. The factor analysis of published and stock materials on title issues allowed to perform a complex analysis of the influence of the main factors of quarry production on the air of the adjacent territory. Features of atmospheric air pollution during the quarrying of sites, ore enrichment and work of service industries have been identified. Identified toxic pollutants cause the occurrence and exacerbation of various human diseases. The urgency of solving the issue of dust suppression during the quarry development of the deposits of the Udokan hearth of mineral resources, as well as the issue of transferring quarry vehicles to the consumption of replenished fuel, i.e. electricity - replacing diesel dump trucks with dump trucks powered by a contact network (trolleybuses, diesel trolleybuses, trolleynoac-cumulative). The urgency of solving the issue of dust transfer at the quarrying development of deposits of the Udokanskiy hotbed of mineral resources was substantiated, as well as the development of the question of the transfer of career vehicles for the consumption of renewable fuels, t. e. Electric power - replacement of diesel pit dump trucks with dump trucks powered by a contact network (trolley vehicles, diesel-trolley-vehicles, troll-batteries).

Reducing dust pollution in the production of mass explosions in quarries

A method was developed to improve the efficiency of dust suppression and increasing of efficiency of energy of explosives in bulk blasting at quarries by using at the top of the borehole sealed shell filled soapstock (waste oil and fat plant) and water in the ratio 50:50. The intensification of the process of deposition of dust over the site of the explosion allows to reduce pollution the quarry site, which has a positive effect on the ecological situation in the region production and mining operations. It is established that with the passage of explosive gases through the shell with soapstock and water in the upper part of the borehole convective heat transfer from the gas shell and the loss of a fraction, the partial pressure on the borehole wall at the location of the shell. Due to the heat loss of the dust and gas cloud loses some of its energy, which leads to a decrease in the height of its ascent and, thus, prevents the removal of it beyond the open pit area.

Experimental study on the synergistic dust reduction of MNBs and surfactants

Spray dust suppression is a primary technological method for controlling coal mine dust. To enhance the wetting and adhesion of droplets to dust particles and improve the efficiency of spray dust suppression, a method of synergistic dust reduction by micro-nano bubbles (MNBs) and surfactants is proposed. This research focuses on MNBs, three different types of surfactants, and low-wetting anthracite coal. Experimental analysis is conducted to investigate the interaction between surfactants and MNBs in solution. The wetting capability of dust particles by the mixed solution of MNBs and surfactants is studied. Additionally, a spray dust suppression experimental platform is employed to compare the dust reduction efficiency of different types of surfactants in synergy with MNBs. The experimental results indicate that surfactants facilitate the generation of nanoscale bubbles, reduce the average diameter of MNBs, and the charge carried by surfactant molecules affects the potential of MNBs. Anionic surfactants decrease the bubble potential, while cationic surfactants elevate it, with non-ionic surfactants having a minimal impact on bubble potential. The presence of MNBs can temporarily reduce the surface tension of a surfactant solution, bringing it to the surface tension at the critical micelle concentration (CMC) but cannot surpass the surface tension beyond the CMC. The addition of low-concentration surfactant solutions to bubbles decreases the contact angle between dust particles and coal dust, while high-concentration surfactant solutions have the opposite effect. In general, the combined use of MNBs and surfactants is beneficial for improving spray dust suppression efficiency. However, extremely high surfactant concentrations lead to an excessive absolute value of bubble potential, enhancing the stability between dust particles and reducing dust suppression efficiency.

Effectiveness of chemical road dust suppressants on paved roads of Pimpri Chinchwad

Introduction: Currently, reducing road dust emissions is a serious problem for safe and environment-protective transportation, leading to Particulate Matter (PM) limit violations and high population exposures to dust containing poisonous metals and mineral particles. Nowadays chemical road dust suppressants are being employed more frequently as a viable remedy to reduce roadside dust emissions.
 Materials and methods: Two seasons winter and summer were selected for the study and during which, typically 3 types of roads as per average traffic density and land-use category identified in the city of Pimpri-Chinchwad were sprayed. Dry samples were taken on day one from a 1 m2 area using a portable vacuum cleaner that was run for 8 to 10 min each. Similarly, samples were collected in the same area after 5-10 min after spraying with Calcium Chloride (CaCl ) and Magnesium Chloride (MgCl ). Also, the second set of 2 samples was collected after 24 h of chemical applied.
 Results: Maximum reduction in silt loading occurred i.e., 99.73% on the application of 30 g/m2 of CaCl . Reduction observed in emission factor of PM2.5 was 97.78% and in the case of PM10 it was 97.59%. While increase in average particle size was observed up to 27.88 µm.
 Conclusion: Both the suppressant efficient in suppressing the road dust but the day 1 result shows more dust suppression as compared to the day 2 dust suppression also as per the dust loading CaCl2 is a better dust suppressant than MgCl2.

Microscopic deposition-property relationships in microbial-induced consolidation of coal dusts

In recent years, the preparation of new microbial dust suppressants based on microbial induced carbonate precipitation (MICP) technology through enriched urease-producing microbial communities has become a new topic in the field of coal dust control. The deposition of CaCO3 was the key to suppress coal dust. However, deposition characteristics in the field is not sufficient and the relationship between deposition characteristics and erosion resistance is not clear, which hinders the development of engineering application of new microbial dust suppressant. Therefore, based on X-CT technology, this paper observed and quantified micro-deposition of bio-consolidated coal dust with different calcium sources. Furthermore, a conceptual framework for deposition was proposed and its correlation with erosion resistance was revealed. The results showed that CaCO3 induced by calcium chloride and calcium lactate was aggregate deposited. Aggregate deposited CaCO3 was small in volume, showed the distribution of aggregation in the central area and loose outside, and mosaiced pores. CaCO3 induced by calcium nitrate was surface deposition due to attached biomass. Surface deposition was mostly large volume CaCO3 expanding from the inside out, which could cover coal dust to a high degree and completely cemented pores. In addition, the threshold detachment velocity of coal dust cemented by surface deposition was increased by 17.6–19.1% compared to aggregate deposition. This depended on the abundance and strength of CaCO3 bonding between coal dust particles under different deposition. The two-factor model based on porosity and CaCO3 coverage can well express relationship between erosion resistance and depositional characteristics. Those results will help the engineering application of MICP technology in coal dust suppression.

Development of an eco-friendly dust suppressant based on modified pectin: experimental and theoretical investigations

This study aims to develop eco-friendly composite dust suppressants to mitigate the adverse impact of coal mine dust on worker health and the environment. An environmentally friendly dust suppressant with bonding and wetting effects was prepared by combining modified pectin as a binder and a non-toxic surfactant as a wetting agent. Optimal ratios of sodium carboxylate ethoxylate sulfate (LMES), isomeric alcohol ethoxylate (XL-70), and modified pectin were determined through experiments. The modified pectin exhibited stronger wetting properties on coal powder due to its increased hydrophilicity. Wetting performance tests confirmed its excellent performance. Film-forming and scanning electron microscope tests demonstrated the dust suppressant's ability to bond with coal dust, resulting in a smooth surface and closely connected particles. Environmental tests showed its non-toxicity and degradability. Spraying dust reduction tests revealed a significant average increase of 40.51 % in dust reduction rate compared to water spraying, effectively lowering dust concentration. These findings have practical implications for the development of eco-friendly composite dust suppressants and controlling underground dust in coal mines, benefiting worker health and environmental sustainability.

Chemical additive based on sodium oleate and linseed oil for preparation coal dust suppression composition

The mining, transportation, and processing of coal involve the formation and emission of significant amounts of particulate matter, which includes coal dust. The most commonly employed method for controlling coal dust in an air is water spray dust suppression (hydrodedusting). This method is founded on water’s capacity to moisten dust particles and bond them to both each other and the surfaces where the dust settles. One notable limitation of this method is the coal’s hydrophobic nature, which hinders water from wetting coal dust particles. In order to overcome this, surfactants are introduced into the water to increase the wettability of the hydrophobic coal particle surface. In this paper, we proposed a dust suppressant composition consisting of oleic acid, sodium hydroxide, and linseed oil in water. We examine its properties and evaluated its ability to enhance the wettability of coal dust. We have identified the most effective concentration, resulting in a working solution that improves the wettability of coal dust by 87 % compared to water, surpassing the wettability of most known reagents. The proposed composition contains 140 mg/L oleic acid, 100 mg/L sodium hydroxide, and 70 mg/L linseed oil in water. The simplicity of this composition, its minimal impact on the environment and human health, and its negligible influence on the further use of coal raw materials make this wetting agent composition highly promising for application in coal industry technologies of water spray dust suppression.

The influence of surfactants' ionicity on the performance of coal dust suppression

Coal dust is a significant health hazard for coal workers, as prolonged inhalation can lead to severe diseases such as Coal Workers' Pneumoconiosis. Water spray with surfactants is commonly used as a pre-control strategy to control coal dust in underground mines. The zeta potential test is a widely used static test to evaluate surfactants with different ionicities. However, there are still some arguments about the evaluation criteria of zeta potential on surfactant performance between different researchers. Moreover, whether zeta potential can be used as an index to evaluate the surfactant suppression performance is inconclusive. To address these problems, this study conducted the zeta potential test and the wind tunnel test (a dynamic test) using various surfactants with different ionicities. It was found that the zeta potential test and the wind tunnel test gave consistent results for the anionic surfactant. However, this trend was not achieved for the non-ionic and cationic surfactants. Therefore, the zeta potential is only suggested to be used as an index to evaluate the surfactant’s dust suppression efficiency, while dynamic tests are still recommended for these two types of surfactants to evaluate dust suppression efficiency.

Biotesting of Binding Reagents for Dust Suppression on Rare Metal Tailings Waste in the Arctic Zone of the Russian Federation

The paper presents the results of environment safety assessment of Russian and foreign binding reagents (Syntex-65, Lukoil DD 3000, Voltes PP-300 and Dustbind) used for remediation of objects of accumulated environmental damage in the Murmansk region. The paper shows that in the presence of anti-erosion and water-retentive phytocenosis on technosoil of loparite ore tailings, these reagents have a partial inhibitory effect on the first first seedlings of timothy grass (Phleum pratense L.) and red fescue (Festuca rubra L.) and statistically (p <0.005) affect its main quality indicators (plant height and biomass). Effective methods of applying reagents to the dusty surface of technosoil were identified. When using the Lukoil DD 3000 reagent as an analogue of Dustbin – continuous, for Voltes PP-300 – fragmentary, when using Syntex-65 – continuous in the mode of simulated hydroseeding.

Study on the cooperation mechanism of urea-hydrolysis bacteria and biosurfactant bacteria for dust suppression

To solve the problems of poor wettability and difficult penetration of microbial dust suppressants caused by the strong hydrophobicity of coal dust, a biosurfactant bacteria (previously screened in coal dust, strain P) and a urea-hydrolysis bacteria (also screened in coal dust, strain X) were co-cultured. In addition, the growth characteristics, mineralization, and emulsification performance of the compound bacteria under different inoculation sequences (P14X, X14P, PX, P24X, and X24P) were studied. Results showed that strain P may inhibit the diffusion of the strain X, but ultimately can synergistically grow and increase the urease activity of co-culture system. It also can be found that the compound bacteria P14X exhibited quite high mineralization and emulsification characteristics. The cooperation mechanism of these two bacteria was explored using the non-targeted gene metabolomics analysis, which found that strain X in co-culture systems can provide fatty acids for the production of biosurfactants and promote the synthesis of rhamnolipids. At the same time, strain P can provide an alkaline environment for the occurrence of mineralization in co-culture systems and promote the generation of CaCO3. The preparation of microbial dust suppressants based on compound bacteria can provide theoretical basis and data support for the application of microbial dust suppressants in the field of coal dust prevention and control.

Effect of alkyl glycoside surfactant on the explosion characteristics of bituminous coal: Experimental and theoretical discussion

To reduce the risk of secondary dust formation and explosions of coal dust captured by spray with surfactant in coal mine working faces, the influence of alkyl polyglucoside (APG) on the explosion characteristics of bituminous coal was studied. The thermokinetic behavior of the APG-coal compound system was analyzed, and the chemical structural evolutions that occurred in coal powder before and after APG treatment were determined. Finally, the mechanism of effect by which APG affects bituminous coal explosion was discussed. The results showed that the carbonyl structure content of samples increased after APG soaking treatment, and the oxidation process of coal powder changed. Coal dust soaked in APG solutions reached a maximum explosion pressure earlier than the raw coal, resulting in a decrease of the boundary concentration. The maximum explosion pressure slightly decreased and the explosion induction time was extended. Additionally, the thermal decomposition rate of the APG-coal mixture system decreased and the maximum heat flow increased. The mechanisms by which APG affects bituminous coal dust explosion were summarized to be a barrier effect and an equivalent combustion effect. The results of this research serve as a reference for coal dust explosions control and for the preparation of new coal dust suppressants were provided.

Study on the effect of electrolyte on surface tension of surfactant solution and wettability of coal dust

It is valuable to study the effect of electrolytes on the surface tension and wettability of surfactant solutions for industrial production. Surface tension test, coal dust sink test, and molecular dynamics simulation are employed to investigate the influence of four electrolytes (NaCl, NaAc, Na2CO3, MgCl2) on nonionic surfactant AEO-9 and anionic surfactant SDBS. The study showed that AEO-9 had a more extraordinary ability to reduce surface tension when the surfactant was applied alone. The surface tension achieved by SDBS solution was lower when compounded with electrolytes. The influence degree of electrolytes on the surface tension of SDBS solutions was shown as MgCl2>NaCl≈Na2CO3>NaAc. In contrast, the influence on the surface tension of AEO-9 solutions was insignificant. In addition, adding electrolytes to the low-concentration surfactant solution can markedly reduce the surface tension. When selecting the electrolytes compounded with anionic surfactants, the electrolyte cation is recommended to choose elements with a larger main groups number in the same periodic element from the periodic table and electrolyte anions that can form more hydrogen bonds with water molecules. The results of the coal dust sink test are different from the results of the surface tension measurement. Regardless of whether the electrolyte is added, the sink time of coal dust in the AEO-9 solution is shorter than that in the SDBS solution, and the wettability is better at the same concentration. The results of this study may guide the selection and design of dust suppression solutions.

Preparation, characterization, and synergistic soil moisture retention effects of a by-product-based dust suppressant for fugitive dust suppression

For the control of dust pollution, a novel dust suppressant was formulated using Resin alcohol C (RC) (by-product of a chemical alcohol preparation from corn) as the main ingredient. Through orthogonal and infiltration experiments, as well as a series of RC screening and optimization processes, an optimal formulation contained 0.3% methylcellulose, 0.1% polyvinyl alcohol, 0.1% cold-water-soluble starch, 0.2% alkyl polyglucosides, and 2.0% RC. The experimental performance results revealed that the by-product dust suppressant had superior water erosion resistance (water loss rate 8.2 %), wind erosion resistance (wind loss rate 7.7% at 20 m/s), durability (suppressed 90.47 % of dust after 50 d), and degradation resistance (mass loss rate of the dust suppressant firm reached ∼43% after 27 d). Fourier-transform infrared spectroscopy and scanning electron microscopy were employed to explore the dust suppression mechanism, which was found to encompass water retention, film-formation, and dust agglomeration. The findings of a pot experiment indicated a synergistic soil moisture retention effect attributed to the implementation of the dust suppressant. This innovative dust suppressant formulation with industrial by-product as the main ingredient offers an effective strategy for mitigating fugitive dust pollution and maintaining soil moisture.

The head-on collision between droplet and stationary particle under mesoscopic scale: Effect of sample size, velocity, viscosity, and wettability

Understanding the collision dynamics between a water mist droplet and a dust particle is crucial for uncovering the mechanisms of water mist dust suppression. However, studies involving mesoscopic-scaled samples have been rarely explored in the past. To address this gap, we performed numerical simulations and experiments to investigate collisions using realistic sizes of water mist and dust particles. Based on our findings, we proposed collision outcome regime maps to illustrate the different collision outcomes. These outcomes were categorized into four distinct regimes: rebounding, complete coalescence, ligament ripping, and skirt splashing. We have proposed both physical equations and fitting equations to describe the thresholds for rebounding, ripping, and splashing. Wettability was found to have a significant impact on the regime boundary equations, while the effects of sample size, collision velocity, and viscosity were minimal. Within the skirt splashing regime, we have proposed a power function to predict the residual liquid fraction of a collision based solely on the Reynolds number, and we have introduced a function combining the Weber number and the Ohnesorge number to predict the non-dimensional momentum transfer. By integrating the equations governing regime boundary, residual liquid fraction, and dimensionless momentum transfer, we can elucidate the dust suppression mechanism of water mist and offer optimized parameters for its effective use in mitigating dust. Interestingly, the study suggests that increasing droplet viscosity holds promise for enhancing dust suppression, rather than solely focusing on improving wettability. This introduces a new perspective to the development of additives for dust suppression.

Research and Industrial Test of Anti-Freezing and Dust Suppression Agent for Truck Roads in Open-Pit Mines in Inner Mongolia, China

To effectively resolve the inherent conflict between dust control and ice prevention on truck roads during North Surface Coal Mine winters, initially, via monomer preference experiments, the optimal monomers for wetting, moisturizing, and condensing functions were identified as sodium dodecylbenzene sulfonate (B), glycerol (N), and polyacrylamide (R). In parallel, through compound synergistic experiments, the constituent elements of an anti-freezing agent were determined, referred to as F. Subsequently, a four-factor three-level orthogonal test was conducted employing the monomers B, N, R, and the anti-freezing agent F. This evaluation focused on four principal control parameters: penetration rate, evaporation resistance, viscosity, and freezing point. The results led to the identification of the optimal antifreeze and dust suppressant formulation, designated as B2N3R1F3. Within the North Open-Pit Coal Mine, the self-developed dust suppressant was applied to the field test section. Multiple parameters were examined for 6 consecutive days, encompassing the water content of the pavement geotechnical soil, the concentrations of total dust and exhaled dust, and the particle size distribution of dust within this road section. The field test results show that: the average water content of the road surface within the dust suppressant test section measured at 12%; the dust reduction efficiency of total dust and exhaled dust is 93% and 91%; the proportion of dust particles with a size exceeding 500 μm increased by 54.6%. These comprehensive findings provide a empirical framework for the effective resolution of the practical challenge of simultaneously managing dust control and frost protection on truck roads within surface coal mines.

Optimization of dust suppression processes during underground mining based on full-scale experimentation and ANSYS Fluent simulation

Optimization of dust suppression processes during underground mining based on full-scale experimentation and ANSYS Fluent simulation

Synergistic dopa-reinforced fluid hydrosol as highly efficient coal dust suppressant

A highly efficient coal dust suppressant with low initial viscosity and high adhesion-solidification properties was fabricated by reinforcing a polyacrylic acid hydrosol with dopa and glutathione (DG) redox system. The synthesis mechanism and dust suppression properties of the dust suppressant were investigated by ultraviolet–visible spectroscopy, high-performance liquid chromatography, and nuclear magnetic resonance spectroscopy experiments combined with density functional theory calculations. The polyacrylic acid hydrosol was synthesized by free radical polymerization with an optimal concentration ratio of 0.36 % ammonium persulfate to 9 % acrylic acid; the DG redox system presented a catechol-quinone dynamic equilibrium, and the dopa polymer reinforcing adhesion was synthesized by the reverse dismutation and polymerization of dopa and dopaquinone. Results revealed that the dust suppressant system formed a multiple hydrogen bonding cross-linking network, dominated by strong double hydrogen bonding interaction formed between the carboxyl groups of dopa polymer and polyacrylic acid, and synergized by hydrogen bonds between the carboxyl groups of glutathione and PAA, and between the hydroxyl and carboxyl groups of dopa and dopaquinone. Moreover, the − OH and − COOH groups in the dust suppressant system were more tightly bonded after dehydration and can form a mesh film to effectively adhere and solidify coal dust, and the coal crust film did not raise dust at 20.526 ± 0.083 m/s wind speed.

Molecular dynamics study on the effect of inorganic salts on the wettability of surfactants on bituminous coal: Sodium dodecyl sulfate and sodium chloride as representatives

To further enhance the wetting ability of surfactants to coal, the mechanism of improving the wetting performance of SDS to bituminous coal by the addition of inorganic salt NaCl was studied through a combination of molecular dynamics (MD) simulation with experimental measurements. In the experiment part, the surface tensions of the mixed NaCl-SDS solutions and the contact angles on the bituminous coal surface were measured. Furthermore, MD simulations were conducted to investigate the adsorption characteristics and wetting mechanism of a mixed NaCl-SDS solution on the coal surface at the atomic scale. In this process, the static potentials of the H2O molecule, coal molecule and SDS molecule were calculated, and the number of hydrogen bonds (H-bonds) formed throughout the whole simulation process, the average H-bond length, the relative concentration distribution (RCD) curve and the mean square displacement (MSD) curve were obtained. The experimental results showed that the surface tension and contact angle were both decreased by the addition of sodium chloride in mixed solutions. When 0.6 mol/L NaCl was added, the surface tension and contact angle reached the minima of 30.45 mN/m and 13.01°, respectively. The MD simulation results showed that, after the addition of NaCl, diffusion and migration of H2O molecules were limited, the number of H-bonds increases, the average bond length decreased, the sorption between H2O molecules and coal molecules was enhanced, and the hydrophilicity of coal surface was improved, which meant that the wetting ability of SDS solution to bituminous coal was enhanced by adding NaCl. The effect of the added NaCl in improving the wettability of SDS on coal was explored from two perspectives with macroscopic experiments and microcosmic simulations, and the added NaCl improved the effects of dust suppressants, and played a key role in preventing dust hazards in coal mines.