Numerical Simulation of Dust Dispersion and Pollution in Breathing Zone of Fully Mechanized Mining Face

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Cheng, Weijia^1 ; Yang, Xudong^1 ; Wang, Xin^1 ; Chen, Jun^1

School of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao, China^1

关键词: Breathing zones;    Contaminated areas;    Fully mechanized coal faces;    Fully mechanized mining face;    Geometric modeling;    High concentration dust;    Hydraulic support;    Transverse movement;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/3/032109/pdf
DOI  :  10.1088/1755-1315/300/3/032109

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In order to more accurately analyze the law of dust escape in the position of breathing zone of fully mechanized coal face, a geometric model of fully mechanized coal face is established in 1205 fully mechanized coal face of Xinan Coal Mine. The movement law of dust with the wind field in the fully mechanized coal face is simulated by FLUENT software, and the dust in the area of breathing zone at different positions is also simulated. The situation is analyzed in detail. The simulation results show that the overall movement law of air flow in the whole working face is from small to large and then to small. When the air flow passes through the area near the shearer, the local space becomes smaller, the wind speed increases and transverse movement occurs. The dust produced by the shearer cutter diffuses into the space of the shearer and its downwind side roadway accompanied by the air flow. A high concentration dust belt is formed in the area near the shearer. The dust contaminated area in front of the Hydraulic support and the space breathing belt of the sidewalk increases gradually with the prolongation of dust production time and covers the height of the whole breathing belt after 80 s of dust production.