Coal dust monitoring and computational simulations of dust dispersion in continuous miner development heading through auxiliary ventilation systems

Sahu, Aashish; Mishra, Devi Prasad

doi:10.18520/cs/v122/i4/419-428

Cited by 6 publications

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“…Sahu and Mishra [21] provided insights into the dispersion behavior of coal dust in the development heading with various auxiliary ventilation systems, focusing on optimizing the line brattice system for dust dispersion. It should be noted that this scheme may not be very applicable when using borer miners and shuttle cars.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Combined Ventilation System for Dust Reduction in Blind Headings of Potash Mines

Sukhanov,

Maltsev,

Semin

et al. 2024

MMEP

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Ensuring safe and comfortable working conditions for miners in potash mines is an urgent and unresolved problem, primarily due to the high intensity of dust emissions. This is especially true for poorly studied situations when the main dust source is the area of ore transfer from the borer miner to the shuttle car. In this paper, we explore the possibilities of reducing dustiness in the atmosphere of a blind heading with an operating borer miner through the implementation of a combined ventilation system. This system integrates both exhaust and forcing ventilation ducts extending to the mouth of the blind heading. A significant innovation of this system is the prioritization of the exhaust fan over the blower fan. The efficacy of the proposed system has been evaluated both theoretically and experimentally. The theoretical analysis involved conducting 3D numerical simulations of dust-air distribution in a blind heading. The stationary turbulent flow of the air-dust mixture in the mine was calculated, taking into account the operating borer miner. The model's validity was confirmed against data from a full-scale experiment. A noticeable reduction in dust concentration was observed in the work areas of the borer miner and shuttle car when using the combined ventilation system compared to forcing ventilation. Based on these model findings, pilot tests of the effectiveness of the combined ventilation system were carried out in a real heading of a potash mine. They showed a reduction in dust concentration by 40-52% compared to the original version of the forcing ventilation system.

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Section: Introductionmentioning

confidence: 99%

Optimization of the Combined Ventilation System for Dust Reduction in Blind Headings of Potash Mines

Sukhanov,

Maltsev,

Semin

et al. 2024

MMEP

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Effects of intrinsic properties, particle size, bulk density, and specific gravity on thermal properties of coal dusts

Sahu

Mishra

2023

Environ Sci Pollut Res

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Thermal properties of pulverized coal govern the heat transfer and greatly in uence the coal dust explosion and spontaneous combustion processes. This study measures the thermal properties of ve coal samples at six distinct particle sizes using an advanced Thermal Property Analyzer. The thermophysical properties of coal dust positively correlated with particle size. Thermal conductivity, diffusivity and speci c heat capacity increased with increase in the ash percentage, bulk density, and speci c gravity of coal dust, whereas they negatively correlated with xed carbon and volatiles content of coal.Empirical relations between the thermo-physical properties were developed. The thermal conductivity, diffusivity, and speci c heat capacity of coal dusts varied in the ranges of 0.091-0.147 W/mK, 0.125-0.164 mm²/s, and 0.715-0.945 MJ/m³K, respectively. With increase in particle size from < 38 to 500-1000 µm, thermal conductivity, thermal diffusivity and speci c heat capacity increased in the range of 25.60-32.89%, 9.76-22.11%, and 9.57-20.80%, respectively for different coal samples.

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Prevention and suppression of coal dust explosion in underground coal mines: Role of rock dust type, particle size, proportion, concentration, and thermal properties

Sahu,

Prasad Mishra

2024

Advanced Powder Technology

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Coal dust monitoring and computational simulations of dust dispersion in continuous miner development heading through auxiliary ventilation systems

Cited by 6 publications

References 0 publications

Optimization of the Combined Ventilation System for Dust Reduction in Blind Headings of Potash Mines

Optimization of the Combined Ventilation System for Dust Reduction in Blind Headings of Potash Mines

Effects of intrinsic properties, particle size, bulk density, and specific gravity on thermal properties of coal dusts

Prevention and suppression of coal dust explosion in underground coal mines: Role of rock dust type, particle size, proportion, concentration, and thermal properties

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