Study on influence of self-discharging truck speed on dust spreading in open-pit

doi:10.16265/j.cnki.issn1003-3033.2017.04.027

Abstract

Abstract: In order to describe the dynamics three-dimensional flow field of dust raised by a mining truck in an open-pit mine, the distribution of airflow fields and that of dust fields were simulated for different speeds of the truck by the dynamic mesh method and the discrete phase particle tracking technology, and real measurement was made in No.2 coal mine in Shenglidong mining area. The result shows that the dust resource comes from the dust bunny on the road, and both the shear airflow and the induced airflow caused by turbulence diffusion are the reason of dust particles spreading, that as time goes on, many dust particles diffuse behind the self-dumping truck before sedimentation, and the dust concentration is 418-956 mg/m³, that there is a positive correlation between both the dust concentration and the height colud of dust and the truck speed, that the dust concentration in No.2 coal mine in Shenglidong mining area is 1 932.2 mg/m³, and that the relative error between measured values and simulation values for each testing section is less than 6.64%.

Key words: dynamic mesh technology, off-highway trucks, open-pit, traffic dust, numerical simulation

CLC Number:

X964

CHEN Xi, GE Shaocheng, DENG Cunbao, ZHANG Xinghua, WANG Shiyao. Study on influence of self-discharging truck speed on dust spreading in open-pit[J]. China Safety Science Journal, 2017, 27(4): 151-156.

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