标题：Dust removal technology of eject spraying between hydraulic supports on fully mechanized mining face
作者：Nie, Wen ;Liu, Yanghao ;Cheng, Weimin ;Zhou, Gang ;Ma, Xiao
作者机构：[Nie, Wen ;Liu, Yanghao ;Cheng, Weimin ;Zhou, Gang ;Ma, Xiao ] State Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong P 更多
来源：Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology)
摘要：In order to effectively solve the problem that it is difficult to control the dusts in the progress of cutting coal by shearer and the shift of hydraulic supports on fully mechanized mining face, the dust removal technology of eject spraying between hydraulic supports on fully mechanized mining face was researched based on the mechanism of dust removal of eject spraying, shearer, structure of hydraulic and characteristics of dust producing. In the 12 kinds of nozzles of hollow and solid conical nozzle spray field, the optimum nozzles which have the best atomization performance (including atomization angle, effectively range and particle diameter) were selected in this experiment. The results show that 8 MPa is the best spray pressure, and under this pressure, the spray fields which formed by dust removal technology of eject spraying between hydraulic supports can cover the space area from the coal wall to the frames of the hydraulic supports. The total volume is 22.03 m3/min, which can inhale effectively the dusty airflow in footway. Compared with the original dust removal methods, the average dust removal rates of total dusts and respirable dusts on fully mechanized mining face increase by 26.2% and 27.3%, respectively, and the average dust removal rates of total dusts and respirable dusts at the position of the move frame workers increase by 30.6% and 31.9%, respectively.
© 2015, Central South University of Technology. All right reserved.