College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China.
State Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China.
Environ Sci Pollut Res Int. 2023 May;30(23):63491-63509. doi: 10.1007/s11356-023-26715-w. Epub 2023 Apr 13.
To better understand the dust dispersion and pollution laws in coal-oil shale fully mechanized mining faces, the airflow distribution and coal and oil shale mixed dust emission law was simulated, and the simulation results are analyzed and verified in combination with the field measured data. The research results showed that in the area 0-10 m on the leeward side of the front drum, most of the coal dust particles with a large particle size stay near the roof of the hydraulic support and the height of the breathing zone, while most of the oil shale dust particles with a large particle size stay in the area below the height of the breathing zone. In the height of the breathing belt, oil shale and coal dust particles seriously polluted the 0-6-m and 0-13-m areas on the leeward side of the front drum of the shearer, respectively. According to the different distribution of coal dust and oil shale dust, a wet dust collector and multi-nozzle atomization set are designed to remove dust. The field test results show that the dust removal rates of the two kinds of dust reach 83.4% and 87.5% respectively after the dust removal device is opened.
为了更好地了解煤油页岩综采工作面的粉尘扩散和污染规律，模拟了风流分布和煤与油页岩混合粉尘的排放规律，并结合现场实测数据对模拟结果进行了分析验证。研究结果表明，在进风侧距前滚筒 0-10m 区域内，粒径较大的煤尘颗粒大部分停留在液压支架顶梁和呼吸带高度附近，而粒径较大的油页岩尘颗粒大部分停留在呼吸带高度以下区域。在呼吸带高度内，油页岩和煤尘颗粒分别严重污染了采煤机进风侧前滚筒的 0-6m 和 0-13m 区域。根据煤尘和油页岩尘的不同分布，设计了湿式除尘器和多喷嘴雾化装置进行除尘。现场试验结果表明，除尘装置开启后，两种粉尘的除尘率分别达到 83.4%和 87.5%。
