The Research on Diffusion Characteristics of Heavy Mine Particles in Low-surface Layer
Based on Lagrangian stochastic model, the spread conditions are analyzed with particle groups. The results show that: (1) From the view of local wind turbulence on the particle diffusion characteristics, the concentration distribution of the heavy particles has evident suspending feature along the ventricle direction. The air speed and turbulence intensity have obvious influence on the particle diffusion characteristics. (2)Through analyses on movement trail of particle group, the most of mine particles are heavy big-size ones, they move along the trail of themselves and move downwards the ground after slipping in the air for a short and crash with the particles on the ground. Those particles cause saltation and creepage phenomena. The percent of the mass migration caused by the saltation movement is above 70％ to the total mass migration. So, the heavy particles are only cause local air pollution and the maximum contributor to ground concentration near the particle source.
Heavy Particle Particle Stochastic Trajectory Model Diffusion Characteristics
X.C.Cong X.Chen
The Civil Engineering and Architecture College, Shandong university of science and technology, Qingd The Civil Engineering and Architecture College, Shandong university of science and technology, Qingd
国际会议
西安
英文
587-591
2009-07-11（万方平台首次上网日期，不代表论文的发表时间）