Numerical Simulation of Dust Pollution of Working Place Near Coal Dump

Abstract

The problem of estimating the level of air pollution in the working areas near the coal pile is considered. The task is to develop a CFD model that allows to predict the level of air dust pollution, taking into account the process of wetting the surface of the coal pile. To model the process of coal dust transfer in the air, a twodimensional mass transfer equation is used, which takes into account coal dust transfer due to convection and diffusion. The Navier-Stokes equations are used to calculate the air flow field near the coal pile. Finite-difference schemes of splitting are used for numerical integration of modeling equations.
 Computer code is developed on the basis of created CFD model. The developed code can be used to analyze the effectiveness of the coal surface wetting to reduce dust pollution of work areas near coal piles. The results of a computational experiment are presented.

Numerical modeling of the wind regime on the beaches of the wash of the artificial storage facilities for mineral processing waste

“…Berland [3]. This made it possible to calculate the value of the wind speed at an arbitrary height by the value of the speed of the incoming air flow at a control height above the earth's surface according to the power law [4][5][6][7]:…”

“…Mining companies play an important role in the country's export potential, as well as in the sustainable development of the regions where they are located [1][2][3][4][5]. However, each such enterprise is accompanied by waste storage facilities for mineral processing waste, which are mostly artificial formations on the earth's surface.…”

“…However, each such enterprise is accompanied by waste storage facilities for mineral processing waste, which are mostly artificial formations on the earth's surface. Most of the artificial storage facilities for mineral processing waste (MPW) are characterized by significant geodetic heights, are long-term and intensive sources of dust pollution in the atmosphere [3][4][5][6][7]. When designing such MPW, the regulatory documents stipulated that the particulate matter fractions capable of dust formation would be under the water layer, and those remaining on the beach surface would not be transported by air, given the height of the beach and the likely value of wind speed.…”

Numerical analysis of aerodynamic regime near tailings storage facility

“…It is this drift that forms the dust cloud near the tailings repository. To determine the speed of detachment of dust particles from the surface, experimental research methods are used [2]. This rate is related to the nature of the dust (e.g., dust from various tailings), dust moisture, dust particle size, material density, etc.…”

Prediction of atmospheric air pollution near a coal stack in adverse weather conditions

“…= ; dimensions of the calculation area 1800 m × 1000 m × 250 m. The emission rate of finely dispersed dust from the surface of the stack is calculated on the basis of empirical dependence[6]; it is assumed that the rate of gravitational settling of dust particles0.0001 s w = m/s. The predicted zone of dust pollution of the industrial site with a south-westerly wind direction is shown on the level 1.8 z = m (figure 2).…”