Design of a water curtain to reduce accumulations of float coal dust in longwall returns

Seaman, Clara; Bugarski, Aleksandar D.; Beck, T.W.; Mischler, Steven E.

doi:10.1016/j.ijmst.2020.05.001

Cited by 26 publications

(7 citation statements)

References 16 publications

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“…Relevant scholars have also used CFD (computational fluid dynamics) numerical calculation methods to study the law of dust migration in fully mechanized mining faces. Seaman et al [16] used the LES large eddy method to simulate the gas motion process and used the Euler-Lagrange method to numerically simulated the spatial distribution of dust particles. Wang et al [17] used CFD methods to calculate and simulate the airflow and dust flow characteristics in the mine and, based on the results, proposed two possible dust control schemes (Figures 2 and 3).…”

Section: Coal Dust Pollution At Fully Mechanized Mining Facementioning

confidence: 99%

Analysis on the Development Status of Coal Mine Dust Disaster Prevention Technology in China

Zhang

Han

et al. 2021

Journal of Healthcare Engineering

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In recent years, with the increasing level of mechanization, automation, and intelligence in mine mining, dust pollution in the working environment of coal mines has become increasingly serious. Coal mine dust prevention is an important work related to the life, health, and production safety of miners, and it is also one of the technical problems of mine safety in production. With the continuous revision and improvement of China′s Occupational Disease Prevention and Control Law, coal mining enterprises have generally strengthened the publicity, prevention, and control of occupational diseases among employees, and the control of coal mine dust has been used as a means for enterprises to improve the production environment and strengthen the occupational health of employees. Key work-based studies have shown that China’s coal mines have formed a theoretical system and technology system of dust prevention and control. In the future, China’s coal mines will start from intelligent dust prevention, achieve high-precision dust sensing-transmission-assessment and early warning, and develop a combined dust collector that integrates the functions of atomization dust removal, miniaturization, dry and wet mixing, and large air suction capacity. The combined dust collector realizes the efficient ventilation control and dust removal of the fine dust in wide-area complex spaces such as fully mechanized mining face and fully mechanized mining face. At the same time, breakthroughs have been achieved in low-permeability coal seams, such as strong hydraulic permeability-enhancing technology, intelligent dust-proof robots, and chemical dust suppression. This article introduces the basic concepts, generation, distribution, and hazards of coal mine dust and analyzes the characteristics, applicable conditions, and use effects of various dust control measures such as ventilation dust removal and wet dust removal. Moreover, this article also proposes specific prevention and control measures for related occupational diseases and discusses the development trend of dust prevention and control technology in the hope of providing guidance and reference for coal mine dust prevention and control.

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Section: Coal Dust Pollution At Fully Mechanized Mining Facementioning

confidence: 99%

Analysis on the Development Status of Coal Mine Dust Disaster Prevention Technology in China

Zhang

Han

et al. 2021

Journal of Healthcare Engineering

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“…[8] The addition of inert materials can significantly reduce the explosive properties of the mixture, until it burns out. This is achieved, for example, by a water curtain, which removes dust from the air stream, thereby reducing its accumulation in the ventilation networks of mines [9]. Another way to reduce the explosiveness of gas-and-dust mixtures is to add a sufficient amount of non-combustible components, such as shale powder [10].…”

Section: Substantiation Of Design Parameters Of Coal Dust Explosion Containment Systemmentioning

confidence: 99%

Substantiation of Design Parameters of Coal Dust Explosion Containment System

Kostenko¹,

Zavialova²,

Pozdieiev³

et al. 2021

News of NAN RK. SGTS

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The aim of the paper is to identify the qualitative and quantitative parameters of seismic waves and accelerations on the mine working contour after an explosion of the gas-and-dust mixture. Information about the formation of seismic waves in the rock mass accommodating the mine working was received using modelling in order to improve the means of containment of explosion of further developed dust-air mixture. The parameters of seismic waves, such as propagation velocity and acceleration, amplitude, and frequency of oscillations of mine working walls, were established for the conditions of the experimental structure, which allows to scientifically substantiating the design parameters of the systems protecting the miners against explosion. The energy of the explosion propagates in the rock mass in the form of a series of peak-like pulses and oscillations with smaller amplitude. Modulus of acceleration is an informational indicator, which suits the most for registration by seismic sensors responding, specifically, to the most powerful peak pulses formed by seismic waves. By revealing the qualitative and quantitative indicators of seismic wave propagation on the mine working contour and in the rock mass, the parameters of seismic sensors of the systems protecting the miners against explosion can be substantiated.

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“…However, the data in Table 6.1 shows that an average of over 50 mg/m 3 of float dust was present just upwind of the return entry. In an effort to reduce the amount of float coal dust entering and depositing in the return, NIOSH investigated the potential dust reduction obtained with a water curtain designed for use on a longwall face [Seaman and Beck 2020]. Testing was conducted in the NIOSH full-scale longwall dust gallery to evaluate single and dual water curtains with different spray nozzle spacing to quantify reductions in float dust levels.…”

Section: Water Curtain On Longwallmentioning

confidence: 99%

Best practices for dust control in coal mining, second edition.

2021

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This document is in the public domain and may be freely copied or reprinted. DisclaimerMention of any company or product does not constitute endorsement by the National Institute for Occupational Safety and Health (NIOSH). In addition, citations to websites external to NIOSH do not constitute NIOSH endorsement of the sponsoring organizations or their programs or products. Furthermore, NIOSH is not responsible for the content of these websites. All web addresses referenced in this document were accessible as of the publication date.

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Design of a water curtain to reduce accumulations of float coal dust in longwall returns

Cited by 26 publications

References 16 publications

Analysis on the Development Status of Coal Mine Dust Disaster Prevention Technology in China

Analysis on the Development Status of Coal Mine Dust Disaster Prevention Technology in China

Substantiation of Design Parameters of Coal Dust Explosion Containment System

Best practices for dust control in coal mining, second edition.

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