Enhancement of ventilation efficiency in blind roadways of potash mines by dust criterion

The dynamics of methane–air mixtures in a dead-end drift of a potash mine are investigated in this study. Methane release is associated with the destruction of potash ore during mining operations. The studied dead-end drift is ventilated using an exhaust ventilation system in which fresh air is supplied through the drift, and polluted air is removed through a ventilation duct equipped with a fan. The regularities of the stationary distribution of methane in the drift are described using a 3D multiparametric numerical simulation. The size and shape of the methane cloud at the roof of the dead-end drift were analyzed depending on the ratio of the main mass transfer mechanisms in the system: forced convection due to the action of the fan, free convection due to the differing densities of the methane–air mixture, and turbulent diffusion. A criterion linking the Reynolds number, the gas Grashof number, and the length of the accumulated methane cloud is determined. Overall, the results of this study have important implications for developing new effective auxiliary mine ventilation systems that can improve the safety of mining operations.

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Analysis of Methane–Air Mixture Dynamics in a Dead-End Drift Ventilated Using an Exhaust System

Семин

Isaevich

2022

Computation

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Study on the Dust Content in Dead-End Drifts in the Potash Mines for Various Ventilation Modes

et al. 2022

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This article deals with the reduction of dust content in the working areas of potash mines in the conditions of operating combines. This problem is topical, since the high dust concentrations in the atmosphere of dead-end drifts lead to the development of occupational diseases among miners, and traditional methods of dust control are often unsuitable for potash salts conditions. We describe the results of experimental studies carried out for the potash mine of the Verkhnekamskoye potassium-magnesium salt deposit. Next, a mathematical model of the dust–air mixture dynamics is formulated and parametrized. The Euler–Euler approach and the model of a homogeneous multicomponent medium are used. The results of a simulation for two ventilation systems (forced and exhaust) are presented. Several options for air flow rates are considered. A conclusion is reached about the most effective parameters of ventilation systems, which allows for minimizing the concentration of dust in the zone of the combine driver.

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Enhancement of ventilation efficiency in blind roadways of potash mines by dust criterion

Cited by 2 publications

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Analysis of Methane–Air Mixture Dynamics in a Dead-End Drift Ventilated Using an Exhaust System

Analysis of Methane–Air Mixture Dynamics in a Dead-End Drift Ventilated Using an Exhaust System

Study on the Dust Content in Dead-End Drifts in the Potash Mines for Various Ventilation Modes

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