Numerical Study of the Dust Distribution Laws in Airflow of Fully-mechanized Mining Faces

The fully-mechanized mining face constitutes the most important source of coal mine dust. In order to effectively control the fully mechanized coal dust,the dust movement laws in the workface were studied with the numerical simulation method. The results showed that under the same particle size of dust particles,the ventilation velocity was larger,the ventilation dustfall rate was lower. According to the analysis of the movement regularities of dust,this paper firstly proposed that,the dust generated from mechanized mining face formed three dust moving zone behind dust producing points,such as dust rapidly diffusing zone,respirable dust pervading zone,and stably suspended dust zone. Among them,the dust control of fully mechanized mining face should be considered as fast diffusion zone as the key area of dust source control.