| Autor: |
Kolesnyk, Valeriy, Pavlychenko, Artem, Borysovs’ka, Olena, Buchavyy, Yuriy |
| Zdroj: |
Diffusion and Defect Data Part B: Solid State Phenomena; June 2018, Vol. 277 Issue: 1 p178-187, 10p |
| Abstrakt: |
During operation of coal mines, polluted air is emitted from the ventilation shafts, it contains large amount of carbon and rock dust with various physical and mechanical composition. Dust contains freshly formed silicon dioxide and other components of the mineral product that are hazardous to human health, which are scattered in the surface layer of the atmosphere. Mainly fine dust comes from the mine workings, and the release of the total dust mass by 80 – 96 % is due to the operation of the loading and unloading complex. It is established that the level of dustiness decreases mainly due to the settling in the mine workings of the coarsely dispersed dust fraction. The environment receives mainly fine dust with a high content of fine particles, which can be intensively dispersed outside the sanitary protection zone of the mine. A mathematical model is obtained in the form of a differential equation of mass transfer, which takes into account the physic and mechanical composition of the dust emission from the ventilation shaft of the coal mine as a factor of ecological hazard. The obtained results determine the directions of effective struggle against dust emissions of coal mines. |
| Databáze: |
Supplemental Index |
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