1. College of Mining and Safety Engineering,Shandong University of Science and Technology,Qingdao　 266590,China; 2. 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

为了提高综采移架产尘喷雾降尘效率,利用CFD(计算流体力学)理论,对七五煤矿213综采工作面的风流-粉尘场、风流-雾滴场进行了数值模拟,揭示了粉尘及雾滴颗粒随风流的运移分布规律。通过现场应用与数值模拟相结合,对比单向喷嘴和双向喷嘴的降尘效果,结果显示,每5架液压支架,在顶梁上沿工作面倾向方向均匀放置3个喷嘴,在前探梁上沿煤壁法线方向均匀布置4个喷嘴的喷嘴组布置方式能覆盖综采工作面移架工序产生的大部分粉尘,并且降尘率达到85. 47%,相比较传统单向喷雾提高了31. 65%。对架间喷雾技术的改进,将有效提高我国综采工作面移架产尘粉尘防治效果,保障矿井的生产安全和工人的职业健康安全。

In order to enhance the spraying dedusting efficiency during the support movement process in a fully-mecha- nized mining face,this study employed computational fluid dynamics (CFD) for conducting a numerical simulation on the airflow-dust field and airflow-droplet field in the No. 213 fully-mechanized mining face of the Qiwu Coal Mine,Chi- na. The aim of simulation was to ascertain the migration and distribution rules of dust particles and droplets under air flow. Accordingly,the dust suppression performances of unidirectional and bidirectional nozzles were compared by com- bining field measurement results and numerical simulation data. The results show that a uniform arrangement of three nozzles on the front canopy along the inclination direction of the mining face,and a uniform arrangement of four nozzles on the top beam along the normal direction of the coal wall for each of five hydraulic supports,can generally cover most of the dust particles that are produced during the support movement in this fully-mechanized mining face,with a dust suppression rate of up to 85． 47% . Compared with the results using traditional unidirectional spraying,the dust sup- pression rate using the proposed combined spraying method can be enhanced by 31. 65% . This improvement to the spraying technique can enhance dust prevention and control performances during support movement in a fully-mecha- nized mining faces,and has a major influence in ensuring the safe production in mines and the occupational health and safety of miners.

ZHOU Gang,YIN Wenjing,Feng Bo. Numerical simulation on the distribution characteristics of dust-droplet field dur- ing support movement in a fully-mechanized mining face and related engi-neering applications[ J]. Journal of China Coal Society,2018,43(12):3425-3435.