STUDY ON THE TEMPORAL AND SPATIAL EVOLUTION LAW OF DUST FUGITIVE IN OPEN-PIT COAL MINE DUMP IN THE YELLOW RIVER BASIN
In order to study the temporal and spatial evolution of dust dispersion in the open-pit coal mine dumpsite in the Yellow River Basin,this paper uses the Hequ open-pit mine dumping site as the research background,and uses COMSOL Multiphysics numerical simulation software to simulate the influence of different surface natural wind velocity and wind speed on dust escape and dust dispersion characteristics of the dumping site,and concludes that with the increase of the natural wind velocity on the surface,the high pressure area formed by the natural wind pressure causes a pressure difference between the windward slope,the bottom of the pit and the leeward slope on the east side of the dumping site during the transfer process.Under the action of the pressure difference,a circulation area is formed,and the transfer process of the circulation area carries the dust particles in the dump out of the pit.
万方数据
维普
