Study and application on foam-water mist integrated dust control technology in fully mechanized excavation face

Wang, Qing‐Guo; Wang, Biao; Han, Fangwei; Yang, Fan; Sheng, Yingxia

doi:10.1016/j.psep.2019.11.008

Cited by 29 publications

(10 citation statements)

References 13 publications

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“…A similar observation is made in studies that controlled respirable coal dust, such as Li et al ( 2019b ) with 97.8% efficiency and 2.14 mg/m 3 residual concentration. Another example is shown in Wang et al ( 2020 ) where an efficiency of 95.0% still exposed workers to 12.4 mg/m 3 of respirable coal dust. This result demonstrates that even when interventions significantly reduce dust levels, there is still a high risk of overexposure.…”

Section: Discussionmentioning

confidence: 94%

See 1 more Smart Citation

A systematic review of the effectiveness of dust control measures adopted to reduce workplace exposure

Anlimah

Gopaldasani

MacPhail

et al. 2023

Environ Sci Pollut Res

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The recent increase in silicosis cases in several countries casts doubt on dust control practices and their effectiveness in preventing respirable crystalline silica (RCS) exposure. Apart from silicosis, RCS may lead to other illnesses, health-related quality of life losses for workers and their families, and economic losses for companies. Thus, this systematic literature review examined the effectiveness of interventions employed to prevent exposure to RCS and increase the use of dust control measures. The review used keywords related to dust control interventions to search seven databases. Search results were screened and extracted for synthesis. The narrative synthesis showed the extent of research investment in China. In several designs and combinations, the interventions utilized water, surfactant, foam, and air currents to reduce dust exposure. These interventions offer varying degrees of dust control effectiveness against RCS and respirable dust. Although evidence indicates that interventions significantly decrease dust concentration levels, the control measures in place may not effectively prevent workplace overexposure to RCS. The review found that education and training interventions are employed to improve dust controls and respiratory protective equipment (RPE) use. Also, marketing strategies promote the use of RPE. These interventions can increase the frequency of use of RPE and the adoption of best practice dust control measures. Interventions increase knowledge, awareness, and attitudes about RPE usage and generate positive perceptions while reducing misconceptions. However, the benefits obtained from an intervention may diminish after its implementation, indicating that the interventions may not continually motivate workers to adopt control measures or use RPE.

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Section: Discussionmentioning

confidence: 94%

“…Several designs combine air and water misting to produce dust control interventions. Integrated interventions can be achieved by combining the foam-water misting study (Wang et al 2020 ) and surfactant magnetized water (Zhou et al 2017c , 2018b ).…”

Section: Discussionmentioning

confidence: 99%

A systematic review of the effectiveness of dust control measures adopted to reduce workplace exposure

Anlimah

Gopaldasani

MacPhail

et al. 2023

Environ Sci Pollut Res

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“…Coal is a type of energy used throughout the world, and it is widely used in the power, fuel, and oil industries [1][2][3][4]. However, with the continuous depletion of shallow coal reserves and the increasing demand for coal, coal mine disasters gradually increase with the increase of the mining depth [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Plastic Area of a Borehole Based on the Gas Extraction Effect and Its Engineering Application

Shi

Lü

et al. 2021

Geofluids

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Gas extraction is most commonly used to control gas disasters in coal mines. The distribution of the plastic zone around a borehole and the sealing quality are key factors affecting gas extraction. In this paper, the plastic zone was simulated by COMSOL, and a theoretical equation of the plastic zone radius was derived. In addition, an antispray hole equipment and the “two plugging and one injection” sealing technology were proposed. The results show that a larger borehole pore size corresponds to a larger plastic zone and larger range of pressure relief of the borehole. The error between the calculated and simulated plastic zone radii is within 1%, and the modified equation is applicable to Puxi mine. The loss and harm caused by borehole spraying are reduced by applying antispray hole equipment. By applying the “two plugging and one injection” sealing technology and phosphogypsum-based self-produced gas expansion paste material to block the borehole, the sealing quality is improved and an accurate gas mixing flow, pure flow, and concentration were obtained. As the plastic zone enlarges, the gas extraction flow gradually increases with, but the relative variation of flow first increases and subsequently decreases. Considering the safety and economy of construction, the optimal radius of the plastic zone is 64.9 mm.

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“…In the world, coal still plays an important role in the energy system. Coal spontaneous combustion is one of the main natural disasters affecting the safety of coal production. − Coal spontaneous combustion not only has caused huge casualties and economic losses but also has seriously damaged the natural environment. − Many technologies have been put forward to prevent coal spontaneous combustion, including grouting, − nitrogen injection, − inhibitor, and gels. − However, with the increase of mining depth, the control effect of these prevention technologies on the more complex coal spontaneous combustion problem was gradually reduced . On the basis of traditional technologies, due to the advantages of low density, high coverage, and good seepage performance, foam technology has been used to inhibit the coal spontaneous combustion …”

Section: Introductionmentioning

confidence: 99%

Colloidal Particle-Stabilized Foam To Control the Coal Spontaneous Combustion: Stability Mechanism Analysis and Extinguishing Properties

et al. 2020

Self Cite

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The stable gel suspensions (SGS) were prepared by using sodium alginate (SA) and fly ash (FA) to form a wide network structure in solution, and the suspension mechanism was analyzed. According to the mechanism of suspension, a large number of SA molecules gathered on the surface of FA particles due to chelation, which made FA particles evenly dispersed in the solution. Then the colloidal particle-stabilized foam (CPSF) was prepared by a certain amount of the SGS and aqueous foam. The effects of different foam-expansion ratios on the half-life time and viscosity of the CPSF were investigated. The foam stability showed that the half-life time of the CPSF changed significantly with the increase of the foam-expansion ratio. Considering a foam half-life time >20 h, the effective foam-expansion ratio range of CPSF was determined as 4.51−7.06. A higher foam-expansion ratio resulted in a poorer viscosity of the foaming solution. Meanwhile, the shear-thinning characteristics were more significant. The results of fireextinguishing experiments and accelerated oxidation experiments indicated that the CPSF could be well-attached to the surface of coal particles, effectively increase the CPT of coal samples, delay the appearance time of CO significantly, reduce the generation of CO rapidly, and show good inhibition performance.

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Study and application on foam-water mist integrated dust control technology in fully mechanized excavation face

Cited by 29 publications

References 13 publications

A systematic review of the effectiveness of dust control measures adopted to reduce workplace exposure

A systematic review of the effectiveness of dust control measures adopted to reduce workplace exposure

Optimization of the Plastic Area of a Borehole Based on the Gas Extraction Effect and Its Engineering Application

Colloidal Particle-Stabilized Foam To Control the Coal Spontaneous Combustion: Stability Mechanism Analysis and Extinguishing Properties

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